1
|
Khunda D, Li S, Cherkasov N, Rishard MZM, Chaffee AL, Rebrov EV. Effect of temperature on the CO 2 splitting rate in a DBD microreactor. REACT CHEM ENG 2023; 8:2223-2233. [PMID: 38014416 PMCID: PMC10443439 DOI: 10.1039/d3re00113j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 05/09/2023] [Indexed: 11/29/2023]
Abstract
A novel plate-to-plate dielectric barrier discharge microreactor (micro DBD) has been demonstrated in CO2 splitting. In this design, the ground electrode has a cooling microchannel to maintain the electrode temperature in the 263-298 K range during plasma operation. A small gap size between the electrodes of 0.50 mm allowed efficient heat transfer from the surrounding plasma to the ground electrode surface to compensate for heat released in the reaction zone and maintain a constant temperature. The effect of temperature on CO2 conversion and energy efficiency was studied at a voltage of 6-9 kV, a frequency of 60 kHz and a constant CO2 flow rate of 20 ml min-1. The CO2 decomposition rate first increased and then decreased as the electrode temperature decreased from 298 to 263 K with a maximum rate observed at 273 K. Operation at lower temperatures enhanced the vibrational dissociation of the CO2 molecule as opposed to electronic excitation which is the main mechanism at room temperature in conventional DBD reactors, however it also reduced the rate of elementary reaction steps. The counterplay between these two effects leads to a maximum in the reaction rate. The power consumption monotonously increased as the temperature decreased. The effective capacitance of the reactor increased by 1.5 times at 263 K as compared to that at 298 K changing the electric field distribution inside the plasma zone.
Collapse
Affiliation(s)
- Deema Khunda
- School of Engineering, University of Warwick Coventry CV4 7AL UK
| | - Sirui Li
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology Eindhoven The Netherlands
| | | | | | - Alan L Chaffee
- School of Chemistry, Monash University Melbourne Victoria Australia
| | - Evgeny V Rebrov
- School of Engineering, University of Warwick Coventry CV4 7AL UK
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology Eindhoven The Netherlands
| |
Collapse
|
2
|
Gregory JW, Gong Y, Han Y, Huband S, Walton RI, Hessel V, Rebrov EV. Au/TiO2 coatings for photocatalytic reduction of 4-nitrophenol to 4-aminophenol with green light. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.114145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
|
3
|
De Felice G, Li S, Gallucci F, Pourali N, Rebrov EV. On design of plasma jet reactor for non-oxidative methane conversion. REACT CHEM ENG 2023; 8:1125-1133. [PMID: 37152402 PMCID: PMC10153470 DOI: 10.1039/d2re00536k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 02/17/2023] [Indexed: 02/23/2023]
Abstract
Non-oxidative methane coupling in a coaxial atmospheric pressure plasma jet reactor with an internal diameter of 3.0 mm has been studied. The jet reactor consisted of a quartz tube surrounded...
Collapse
|
4
|
Zheng HB, Wang YL, Xie JW, Gao PZ, Li DY, Rebrov EV, Qin H, Liu XP, Xiao HN. Correction to "Enhanced Alkaline Oxygen Evolution Using Spin Polarization and Magnetic Heating Effect under AC Magnetic Field". ACS Appl Mater Interfaces 2022; 14:56427. [PMID: 36484625 DOI: 10.1021/acsami.2c21282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Affiliation(s)
- Hang-Bo Zheng
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Yuan-Li Wang
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Jia-Wei Xie
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Peng-Zhao Gao
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Dong-Yun Li
- College of Materials Science and Engineering, China Jiliang University, Hangzhou 310016, China
| | - Evgeny V Rebrov
- School of Engineering, University of Warwick, Coventry CV4 7AL, U.K
| | - Hang Qin
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Xiao-Pan Liu
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Han-Ning Xiao
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| |
Collapse
|
5
|
Zheng HB, Wang YL, Xie JW, Gao PZ, Li DY, Rebrov EV, Qin H, Liu XP, Xiao HN. Enhanced Alkaline Oxygen Evolution Using Spin Polarization and Magnetic Heating Effects under an AC Magnetic Field. ACS Appl Mater Interfaces 2022; 14:34627-34636. [PMID: 35862430 DOI: 10.1021/acsami.2c05977] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Renewable electricity from splitting water to produce hydrogen is a favorable technology to achieve carbon neutrality, but slow anodic oxygen evolution reaction (OER) kinetics limits its large-scale commercialization. Electron spin polarization and increasing the reaction temperature are considered as potential ways to promote alkaline OER. Here, it is reported that in the alkaline OER process under an AC magnetic field, a ferromagnetic ordered electrocatalyst can simultaneously act as a heater and a spin polarizer to achieve significant OER enhancement at a low current density. Moreover, its effect obviously precedes antiferromagnetic, ferrimagnetic, and diamagnetic electrocatalysts. In particular, the noncorrected overpotential of the ferromagnetic electrocatalyst Co at 10 mA cm-2 is reduced by a maximum of 36.6% to 243 mV at 4.320 mT. It is found that the magnetic heating effect is immediate, and more importantly, it is localized and hardly affects the temperature of the entire electrolytic cell. In addition, the spin pinning effect established on the ferromagnetic/paramagnetic interface generated during the reconstruction of the ferromagnetic electrocatalyst expands the ferromagnetic order of the paramagnetic layer. Also, the introduction of an external magnetic field further increases the orderly arrangement of spins, thereby promoting OER. This work provides a reference for the design of high-performance OER electrocatalysts under a magnetic field.
Collapse
Affiliation(s)
- Hang-Bo Zheng
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Yuan-Li Wang
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Jia-Wei Xie
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Peng-Zhao Gao
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Dong-Yun Li
- College of Materials Science and Engineering, China Jiliang University, Hangzhou 310016, China
| | - Evgeny V Rebrov
- School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast BT9 5AG, U.K
| | - Hang Qin
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Xiao-Pan Liu
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Han-Ning Xiao
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| |
Collapse
|
6
|
Zheng HB, Chen HH, Wang YL, Gao PZ, Liu XP, Rebrov EV. Fabrication of Magnetic Superstructure NiFe 2O 4@MOF-74 and Its Derivative for Electrocatalytic Hydrogen Evolution with AC Magnetic Field. ACS Appl Mater Interfaces 2020; 12:45987-45996. [PMID: 32946212 DOI: 10.1021/acsami.0c11816] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
As an ideal hydrogen production route, electrolyzed water still faces the challenges of high cost of noble-metal electrocatalysts and low performance of non-noble-metal catalysts in scalable applications. Recently, introduction of external fields (such as magnetic fields, light fields, etc.) to improve the electrocatalytic water splitting performance of non-noble-metal catalysts has attracted great attention due to their simplicity. Here, a simple method for preparing magnetic superstructure (NiFe2O4@MOF-74) is described, and the hydrogen evolution reaction (HER) behavior of its carbonized derivative, a ferromagnetic superstructure, is revealed in a wide range of applied voltage under an AC magnetic field. The overpotential (@10 mA cm-2) required for the HER of the obtained ferromagnetic superstructure in 1 M KOH was reduced by 31 mV (7.7%) when a much small AC magnetic field (only 2.3 mT) is applied. Surprisingly, the promotion effect of the AC magnetic field is not monotonically increasing with the increase of the applied voltage or the strength of AC magnetic field, but increasing first, then weakening. This unusual behavior is believed to be mainly caused by the enhanced induced electromotive force and the additional energy by the applied AC magnetic field. This discovery provides a new idea for adjusting the performance of electrocatalytic reactions.
Collapse
Affiliation(s)
- Hang-Bo Zheng
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Hui-Hui Chen
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Yuan-Li Wang
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
| | - Peng-Zhao Gao
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
- Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha, Hunan 410082, China
- Hunan Province Key Laboratory for Spray Deposition Technology and Application, Hunan University, Changsha, Hunan 410082, China
| | - Xiao-Pan Liu
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
- Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha, Hunan 410082, China
- Hunan Province Key Laboratory for Spray Deposition Technology and Application, Hunan University, Changsha, Hunan 410082, China
| | - Evgeny V Rebrov
- School of Engineering, University of Warwick, Coventry CV4 7AL, U.K
| |
Collapse
|
7
|
Bangjang T, Cherkasov N, Denissenko P, Jaree A, Rebrov EV. Enhanced Droplet Size Control in Liquid‐Liquid Emulsions Obtained in a Wire‐Guided X‐Mixer. Chem Eng Technol 2019. [DOI: 10.1002/ceat.201800440] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Thapanee Bangjang
- Kasetsart University, Faculty of EngineeringDepartment of Chemical Engineering 50 Paholyotin Rd. 10900 Bangkok Thailand
- University of WarwickSchool of Engineering Library Road CV4 7AL Coventry United Kingdom
| | - Nikolay Cherkasov
- University of WarwickSchool of Engineering Library Road CV4 7AL Coventry United Kingdom
| | - Petr Denissenko
- University of WarwickSchool of Engineering Library Road CV4 7AL Coventry United Kingdom
| | - Attasak Jaree
- Kasetsart University, Faculty of EngineeringDepartment of Chemical Engineering 50 Paholyotin Rd. 10900 Bangkok Thailand
- Kasetsart UniversityFaculty of Engineering, Center for Advanced Studies in Industrial Technology 50 Ngamwongwan Rd. Chatuchak 10900 Bangkok Thailand
| | - Evgeny V. Rebrov
- University of WarwickSchool of Engineering Library Road CV4 7AL Coventry United Kingdom
- Tver State Technical UniversityDepartment of Biotechnology and Chemistry Nab. A. Nikitina 22 170026 Tver Russia
| |
Collapse
|
8
|
Exposito AJ, Bai Y, Tchabanenko K, Rebrov EV, Cherkasov N. Process Intensification of Continuous-Flow Imine Hydrogenation in Catalyst-Coated Tube Reactors. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b06058] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Antonio J. Exposito
- Stoli Catalysts Ltd., Coventry CV3 4DS, United Kingdom
- School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Yang Bai
- Stoli Catalysts Ltd., Coventry CV3 4DS, United Kingdom
- School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Kirill Tchabanenko
- School of Chemistry and Chemical Engineering, Queen’s University, Belfast BT9 5AG, United Kingdom
| | - Evgeny V. Rebrov
- Stoli Catalysts Ltd., Coventry CV3 4DS, United Kingdom
- School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom
- Department of Biotechnology and Chemistry, Tver State Technical University, Naberezhnaya Afanasiya Nikitina 22, Tver 170026, Russia
| | - Nikolay Cherkasov
- Stoli Catalysts Ltd., Coventry CV3 4DS, United Kingdom
- School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom
| |
Collapse
|
9
|
Cherkasov N, Expósito AJ, Bai Y, Rebrov EV. Counting bubbles: precision process control of gas–liquid reactions in flow with an optical inline sensor. REACT CHEM ENG 2019. [DOI: 10.1039/c8re00186c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A 10$ optical liquid sensor allows precise control of reaction conversion in gas-consuming reactions for high selectivity and catalyst utilization.
Collapse
Affiliation(s)
- Nikolay Cherkasov
- School of Engineering
- University of Warwick
- Coventry CV4 7AL
- UK
- Stoli Catalysts Ltd
| | | | - Yang Bai
- School of Engineering
- University of Warwick
- Coventry CV4 7AL
- UK
| | - Evgeny V. Rebrov
- School of Engineering
- University of Warwick
- Coventry CV4 7AL
- UK
- Stoli Catalysts Ltd
| |
Collapse
|
10
|
Cherkasov N, Bai Y, Expósito AJ, Rebrov EV. OpenFlowChem – a platform for quick, robust and flexible automation and self-optimisation of flow chemistry. REACT CHEM ENG 2018. [DOI: 10.1039/c8re00046h] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
OpenFlowChem – an open-access platform for automation of process control and monitoring optimised for flexibility.
Collapse
Affiliation(s)
- Nikolay Cherkasov
- School of Engineering
- University of Warwick
- Coventry CV4 7AL
- UK
- Stoli Catalysts Ltd
| | - Yang Bai
- Stoli Catalysts Ltd
- Coventry CV3 4DS
- UK
| | | | - Evgeny V. Rebrov
- School of Engineering
- University of Warwick
- Coventry CV4 7AL
- UK
- Stoli Catalysts Ltd
| |
Collapse
|
11
|
Chatterjee S, Houlding TK, Doluda VY, Molchanov VP, Matveeva VG, Rebrov EV. Thermal Behavior of a Catalytic Packed-Bed Milli-reactor Operated under Radio Frequency Heating. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b01723] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sourav Chatterjee
- School of Chemistry & Chemical Engineering, Queen’s University Belfast, Stranmillis Road, BT9 5AG Belfast, United Kingdom
| | - Thomas K. Houlding
- School of Chemistry & Chemical Engineering, Queen’s University Belfast, Stranmillis Road, BT9 5AG Belfast, United Kingdom
| | - Valentin Yu. Doluda
- Department
of Biotechnology and Chemistry, Tver State Technical University, Tver 170026, Russia
| | - Vladimir P. Molchanov
- Department
of Biotechnology and Chemistry, Tver State Technical University, Tver 170026, Russia
| | - Valentina G. Matveeva
- Department
of Biotechnology and Chemistry, Tver State Technical University, Tver 170026, Russia
| | - Evgeny V. Rebrov
- Department
of Biotechnology and Chemistry, Tver State Technical University, Tver 170026, Russia
- School
of Engineering, University of Warwick, CV4 7AL Coventry, United Kingdom
| |
Collapse
|
12
|
Liu Y, Cherkasov N, Gao P, Fernández J, Lees MR, Rebrov EV. The enhancement of direct amide synthesis reaction rate over TiO 2 @SiO 2 @NiFe 2 O 4 magnetic catalysts in the continuous flow under radiofrequency heating. J Catal 2017. [DOI: 10.1016/j.jcat.2017.09.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
13
|
García-Aguilar J, Fernández-García J, Rebrov EV, Lees MR, Gao P, Cazorla-Amorós D, Berenguer-Murcia Á. Magnetic zeolites: novel nanoreactors through radiofrequency heating. Chem Commun (Camb) 2017; 53:4262-4265. [DOI: 10.1039/c7cc01138e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel ferrite@zeolites have been synthesized and applied in citronellal isomerization under radiofrequency heating for enhanced microreactor development.
Collapse
Affiliation(s)
- Jaime García-Aguilar
- Inorganic Chemistry Department and Materials Science Institute
- Alicante University
- E-03080 Alicante
- Spain
| | | | - Evgeny V. Rebrov
- University of Warwick
- Coventry
- UK
- Department of Biotechnology and Chemistry
- Tver State Technical University
| | | | - Pengzhao Gao
- College of Materials Science and Engineering
- Hunan University
- Changsha
- China
| | - Diego Cazorla-Amorós
- Inorganic Chemistry Department and Materials Science Institute
- Alicante University
- E-03080 Alicante
- Spain
| | - Ángel Berenguer-Murcia
- Inorganic Chemistry Department and Materials Science Institute
- Alicante University
- E-03080 Alicante
- Spain
| |
Collapse
|
14
|
Cherkasov N, Al-Rawashdeh M’, Ibhadon AO, Rebrov EV. Scale up study of capillary microreactors in solvent-free semihydrogenation of 2‐methyl‐3‐butyn‐2‐ol. Catal Today 2016. [DOI: 10.1016/j.cattod.2016.03.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
15
|
|
16
|
Mann J, Doluda VY, Leonard C, Losovyj YB, Morgan DG, Bukalov SS, Shifrina Z, Stein BD, Cherkasov N, Rebrov EV, Harms ZD, Pink M, Sulman EM, Bronstein L. Metal oxide–zeolite composites in transformation of methanol to hydrocarbons: do iron oxide and nickel oxide matter? RSC Adv 2016. [DOI: 10.1039/c6ra19471k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel, hierarchical zeolites modified with both Fe3O4 and NixOy nanoparticles have been developed and studied in the methanol-to-hydrocarbon process.
Collapse
Affiliation(s)
- Joshua Mann
- Indiana University
- Department of Chemistry
- Bloomington
- USA
| | - Valentin Yu Doluda
- Tver State Technical University
- Department of Biotechnology and Chemistry
- Tver
- Russia
| | - Clara Leonard
- Indiana University
- Department of Chemistry
- Bloomington
- USA
| | | | | | - Sergey S. Bukalov
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
| | - Zinaida Shifrina
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
| | | | | | - Evgeny V. Rebrov
- Tver State Technical University
- Department of Biotechnology and Chemistry
- Tver
- Russia
- School of Engineering
| | | | - Maren Pink
- Indiana University
- Department of Chemistry
- Bloomington
- USA
| | - Esther M. Sulman
- Tver State Technical University
- Department of Biotechnology and Chemistry
- Tver
- Russia
| | - Lyudmila Bronstein
- Indiana University
- Department of Chemistry
- Bloomington
- USA
- A.N. Nesmeyanov Institute of Organoelement Compounds
| |
Collapse
|
17
|
Liu Y, Gao P, Cherkasov N, Rebrov EV. Direct amide synthesis over core–shell TiO2@NiFe2O4 catalysts in a continuous flow radiofrequency-heated reactor. RSC Adv 2016. [DOI: 10.1039/c6ra22659k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A core–shell TiO2@NiFe2O4 catalyst showed high activity and stability in direct amide synthesis with easy regeneration from coke by a treatment with a 30 wt% hydrogen peroxide solution.
Collapse
Affiliation(s)
- Yawen Liu
- School of Engineering
- University of Warwick
- Coventry CV4 7AL
- UK
| | - Pengzhao Gao
- College of Materials Science and Engineering
- Hunan University
- Changsha 410082
- China
| | | | - Evgeny V. Rebrov
- School of Engineering
- University of Warwick
- Coventry CV4 7AL
- UK
- Department of Biotechnology and Chemistry
| |
Collapse
|
18
|
Cherkasov N, Ibhadon AO, Rebrov EV. Novel synthesis of thick wall coatings of titania supported Bi poisoned Pd catalysts and application in selective hydrogenation of acetylene alcohols in capillary microreactors. Lab Chip 2015; 15:1952-1960. [PMID: 25749619 DOI: 10.1039/c4lc01066c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Catalysis in microreactors allows reactions to be performed in a very small volume, reducing the environmental problems and greatly intensifying the processes through easy pressure control and the elimination of heat- and mass-transfer limitations. In this study, we report a novel method for the controlled synthesis of micrometre-thick mesoporous TiO2 catalytic coatings on the walls of long channels (>1 m) of capillary microreactors in a single deposition step. The method uses elevated temperature and introduces a convenient control parameter of the deposition rate (displacement speed controlled by a stepper motor), which allows deposition from concentrated and viscous sols without channel clogging. A capillary microreactor wall-coated with titania supported Bi-poisoned Pd catalyst was obtained using the method and used for the semihydrogenation of 2-methyl-3-butyn-2-ol providing 93 ± 1.5% alkene yield for 100 h without deactivation. Although the coating method was applied only for TiO2 deposition, it is nonetheless suitable for the deposition of volatile sols.
Collapse
Affiliation(s)
- Nikolay Cherkasov
- Catalysis and Reactor Engineering Research Group, Department of Chemistry and School of Biological, Biomedical and Environmental Sciences, University of Hull, Cottingham Road, Hull, HU6 7RX, UK.
| | | | | |
Collapse
|
19
|
Patil NG, Benaskar F, Rebrov EV, Meuldijk J, Hulshof† LA, Hessel V, Schouten JC. Microwave Setup Design for Continuous Fine-Chemicals Synthesis. Chem Eng Technol 2014. [DOI: 10.1002/ceat.201400118] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
20
|
Patil NG, Benaskar F, Rebrov EV, Meuldijk J, Hulshof LA, Hessel V, Schouten JC. Scale-up of Microwave Assisted Flow Synthesis by Transient Processing through Monomode Cavities in Series. Org Process Res Dev 2014. [DOI: 10.1021/op500064k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Narendra G. Patil
- Laboratory
of Chemical Reactor Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Faysal Benaskar
- Laboratory
of Chemical Reactor Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Evgeny V. Rebrov
- School
of Chemistry and Chemical Engineering, Queen’s University Belfast, Stranmillis
Road, Belfast, BT9 5AG, United Kingdom
| | - Jan Meuldijk
- Laboratory
of Chemical Reactor Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Lubertus A. Hulshof
- Laboratory
of Chemical Reactor Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Volker Hessel
- Laboratory
of Chemical Reactor Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jaap C. Schouten
- Laboratory
of Chemical Reactor Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| |
Collapse
|
21
|
Patil NG, Benaskar F, Meuldijk J, Hulshof LA, Hessel V, Schouten JC, Esveld EDC, Rebrov EV. Microwave assisted flow synthesis: Coupling of electromagnetic and hydrodynamic phenomena. AIChE J 2014. [DOI: 10.1002/aic.14552] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Narendra G. Patil
- Laboratory of Chemical Reactor Engineering; Eindhoven University of Technology; P.O. Box 513, 5600 MB Eindhoven The Netherlands
| | - Faysal Benaskar
- Laboratory of Chemical Reactor Engineering; Eindhoven University of Technology; P.O. Box 513, 5600 MB Eindhoven The Netherlands
| | - Jan Meuldijk
- Laboratory of Chemical Reactor Engineering; Eindhoven University of Technology; P.O. Box 513, 5600 MB Eindhoven The Netherlands
| | - Lumbertus A. Hulshof
- Laboratory of Chemical Reactor Engineering; Eindhoven University of Technology; P.O. Box 513, 5600 MB Eindhoven The Netherlands
| | - Volker Hessel
- Laboratory of Chemical Reactor Engineering; Eindhoven University of Technology; P.O. Box 513, 5600 MB Eindhoven The Netherlands
| | - Jaap C. Schouten
- Laboratory of Chemical Reactor Engineering; Eindhoven University of Technology; P.O. Box 513, 5600 MB Eindhoven The Netherlands
| | - Erik D. C. Esveld
- Food and Biobased Research; Wageningen University; P.O. Box 17 6700 AA Wageningen The Netherlands
| | - Evgeny V. Rebrov
- School of Chemistry and Chemical Engineering; Queen's University Belfast; Stranmillis Road Belfast BT9 5AG United Kingdom
| |
Collapse
|
22
|
Yue J, Rebrov EV, Schouten JC. Gas-liquid-liquid three-phase flow pattern and pressure drop in a microfluidic chip: similarities with gas-liquid/liquid-liquid flows. Lab Chip 2014; 14:1632-1649. [PMID: 24651271 DOI: 10.1039/c3lc51307f] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report a three-phase slug flow and a parallel-slug flow as two major flow patterns found under the nitrogen-decane-water flow through a glass microfluidic chip which features a long microchannel with a hydraulic diameter of 98 μm connected to a cross-flow mixer. The three-phase slug flow pattern is characterized by a flow of decane droplets containing single elongated nitrogen bubbles, which are separated by water slugs. This flow pattern was observed at a superficial velocity of decane (in the range of about 0.6 to 10 mm s(-1)) typically lower than that of water for a given superficial gas velocity in the range of 30 to 91 mm s(-1). The parallel-slug flow pattern is characterized by a continuous water flow in one part of the channel cross section and a parallel flow of decane with dispersed nitrogen bubbles in the adjacent part of the channel cross section, which was observed at a superficial velocity of decane (in the range of about 2.5 to 40 mm s(-1)) typically higher than that of water for each given superficial gas velocity. The three-phase slug flow can be seen as a superimposition of both decane-water and nitrogen-decane slug flows observed in the chip when the flow of the third phase (viz. nitrogen or water, respectively) was set at zero. The parallel-slug flow can be seen as a superimposition of the decane-water parallel flow and the nitrogen-decane slug flow observed in the chip under the corresponding two-phase flow conditions. In case of small capillary numbers (Ca ≪ 0.1) and Weber numbers (We ≪ 1), the developed two-phase pressure drop model under a slug flow has been extended to obtain a three-phase slug flow model in which the 'nitrogen-in-decane' droplet is assumed as a pseudo-homogeneous droplet with an effective viscosity. The parallel flow and slug flow pressure drop models have been combined to obtain a parallel-slug flow model. The obtained models describe the experimental pressure drop with standard deviations of 8% and 12% for the three-phase slug flow and parallel-slug flow, respectively. An example is given to illustrate the model uses in designing bifurcated microchannels that split the three-phase slug flow for high-throughput processing.
Collapse
Affiliation(s)
- Jun Yue
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
| | | | | |
Collapse
|
23
|
Al-Rawashdeh M, Yue F, Patil NG, Nijhuis TA, Hessel V, Schouten JC, Rebrov EV. Designing flow and temperature uniformities in parallel microchannels reactor. AIChE J 2014. [DOI: 10.1002/aic.14443] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ma'moun Al-Rawashdeh
- Dept. of Chemical Engineering and Chemistry, Laboratory of Chemical Reactor Engineering; Eindhoven University of Technology; Eindhoven 5600 MB The Netherlands
| | - Fangyuan Yue
- Dept. of Chemical Engineering and Chemistry, Laboratory of Chemical Reactor Engineering; Eindhoven University of Technology; Eindhoven 5600 MB The Netherlands
| | - Narendra G. Patil
- Dept. of Chemical Engineering and Chemistry, Laboratory of Chemical Reactor Engineering; Eindhoven University of Technology; Eindhoven 5600 MB The Netherlands
| | - T. A. Nijhuis
- Dept. of Chemical Engineering and Chemistry, Laboratory of Chemical Reactor Engineering; Eindhoven University of Technology; Eindhoven 5600 MB The Netherlands
| | - Volker Hessel
- Dept. of Chemical Engineering and Chemistry, Laboratory of Chemical Reactor Engineering; Eindhoven University of Technology; Eindhoven 5600 MB The Netherlands
| | - Jaap C. Schouten
- Dept. of Chemical Engineering and Chemistry, Laboratory of Chemical Reactor Engineering; Eindhoven University of Technology; Eindhoven 5600 MB The Netherlands
| | - Evgeny V. Rebrov
- Reactor and Process Engineering; School of Chemistry and Chemical Engineering, Queen's University Belfast; Belfast BT9 5AG U.K
| |
Collapse
|
24
|
Abstract
We present a simple method for direct and solvent-free formation of amides from carboxylic acids and amines using radiofrequency heating. The direct energy coupling of the AC magnetic field via nickel ferrite magnetic nanoparticles enables fast and controllable heating, as well as enabling facile work-up via magnetic separation.
Collapse
Affiliation(s)
- Thomas K Houlding
- School of Chemistry & Chemical Engineering, Queens University Belfast, Stranmillis Road, Belfast, BT9 5AG, UK
| | | | | | | |
Collapse
|
25
|
Benaskar F, Engels V, Patil NG, Rebrov EV, Meuldijk J, Hessel V, Hulshof LA, Wheatley AEH, Schouten JC. A Kinetic Study on the Cu(0)-Catalyzed Ullmann-Type Nucleophilic Aromatic Substitution C–O Coupling of Potassium Phenolate and 4-Chloropyridine. Ind Eng Chem Res 2013. [DOI: 10.1021/ie402956n] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Faysal Benaskar
- Department
of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Volker Engels
- The University Chemical Laboratories, Cambridge University, Cambridge, U.K
| | - Narendra G. Patil
- Department
of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Evgeny V. Rebrov
- School
of Chemistry and Chemical Engineering, Queen’s University Belfast Belfast, U.K
| | - Jan Meuldijk
- Department
of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Volker Hessel
- Department
of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Lumbertus A. Hulshof
- School
of Chemistry and Chemical Engineering, Queen’s University Belfast Belfast, U.K
| | | | - Jaap. C. Schouten
- Department
of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
| |
Collapse
|
26
|
Rooze J, Rebrov EV, Schouten JC, Keurentjes JTF. Dissolved gas and ultrasonic cavitation--a review. Ultrason Sonochem 2013; 20:1-11. [PMID: 22705074 DOI: 10.1016/j.ultsonch.2012.04.013] [Citation(s) in RCA: 135] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Revised: 04/23/2012] [Accepted: 04/28/2012] [Indexed: 05/20/2023]
Abstract
The physics and chemistry of nonlinearly oscillating acoustic cavitation bubbles are strongly influenced by the dissolved gas in the surrounding liquid. Changing the gas alters among others the luminescence spectrum, and the radical production of the collapsing bubbles. An overview of experiments with various gas types and concentration described in literature is given and is compared to mechanisms that lead to the observed changes in luminescence spectra and radical production. The dissolved gas type changes the bubble adiabatic ratio, thermal conductivity, and the liquid surface tension, and consequently the hot spot temperature. The gas can also participate in chemical reactions, which can enhance radical production or luminescence of a cavitation bubble. With this knowledge, the gas content in cavitation can be tailored to obtain the desired output.
Collapse
Affiliation(s)
- Joost Rooze
- Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | | | | | | |
Collapse
|
27
|
Patil NG, Benaskar F, Rebrov EV, Meuldijk J, Hulshof LA, Hessel V, Schouten JC. Continuous Multitubular Millireactor with a Cu Thin Film for Microwave-Assisted Fine-Chemical Synthesis. Ind Eng Chem Res 2012. [DOI: 10.1021/ie300754z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Narendra G. Patil
- Laboratory of Chemical Reactor
Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Faysal Benaskar
- Laboratory of Chemical Reactor
Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Evgeny V. Rebrov
- School of Chemistry and Chemical
Engineering, Queen’s University Belfast, Stranmillis Road, Belfast, BT9 5AG, United Kingdom
| | - Jan Meuldijk
- Laboratory of Chemical Reactor
Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Lumbertus A. Hulshof
- Laboratory of Chemical Reactor
Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Volker Hessel
- Laboratory of Chemical Reactor
Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jaap C. Schouten
- Laboratory of Chemical Reactor
Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| |
Collapse
|
28
|
Rebrov EV, Duisters T, Löb P, Meuldijk J, Hessel V. Enhancement of the Liquid-Side Mass Transfer in a Falling Film Catalytic Microreactor by In-Channel Mixing Structures. Ind Eng Chem Res 2012. [DOI: 10.1021/ie301058h] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Evgeny V. Rebrov
- Queen’s University Belfast, Stranmillis Road, BT9 5AG Belfast,
United Kingdom
| | - Thijs Duisters
- Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The
Netherlands
| | - Patrick Löb
- Institut für Mikrotechnik Mainz GmbH, Carl-Zeiss-Str. 18-20, 55129
Mainz, Germany
| | - Jan Meuldijk
- Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The
Netherlands
| | - Volker Hessel
- Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The
Netherlands
| |
Collapse
|
29
|
|
30
|
Wang Q, Rebrov EV, Hessel V. Droplet size control with methanol-repellent surface in a sampling device for continuous annular electrochromatography. J Sep Sci 2012; 35:445-51. [DOI: 10.1002/jssc.201100622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 10/27/2011] [Accepted: 10/27/2011] [Indexed: 11/11/2022]
|
31
|
Benaskar F, Engels V, Rebrov EV, Patil NG, Meuldijk J, Thüne PC, Magusin PCMM, Mezari B, Hessel V, Hulshof LA, Hensen EJM, Wheatley AEH, Schouten JC. New Cu-Based Catalysts Supported on TiO2 Films for Ullmann SNAr-Type CO Coupling Reactions. Chemistry 2012; 18:1800-10. [DOI: 10.1002/chem.201102151] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Indexed: 11/07/2022]
|
32
|
Patil NG, Rebrov EV, Eränen K, Benaskar F, Meuldijk J, Mikkola JP, Hessel V, Hulshof LA, Murzin DY, Schouten JC. Effect of the load size on the efficiency of microwave heating under stop flow and continuous flow conditions. J Microw Power Electromagn Energy 2012; 46:83-92. [PMID: 24427859 DOI: 10.1080/08327823.2012.11689827] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A novel heating efficiency analysis of the microwave heated stop-flow (i.e. stagnant liquid) and continuous-flow reactors has been presented. The thermal losses to the surrounding air by natural convection have been taken into account for heating efficiency calculation of the microwave heating process. The effect of the load diameter in the range of 4-29 mm on the heating efficiency of ethylene glycol was studied in a single mode microwave cavity under continuous flow and stop-flow conditions. The variation of the microwave absorbing properties of the load with temperature was estimated. Under stop-flow conditions, the heating efficiency depends on the load diameter. The highest heating efficiency has been observed at the load diameter close to the half wavelength of the electromagnetic field in the corresponding medium. Under continuous-flow conditions, the heating efficiency increased linearly. However, microwave leakage above the propagation diameter restricted further experimentation at higher load diameters. Contrary to the stop-flow conditions, the load temperature did not raise monotonously from the inlet to outlet under continuous-flow conditions. This was due to the combined effect of lagging convective heat fluxes in comparison to volumetric heating. This severely disturbs the uniformity of the electromagnetic field in the axial direction and creates areas of high and low field intensity along the load Length decreasing the heating efficiency as compared to stop-flow conditions.
Collapse
Affiliation(s)
- Narendra G Patil
- Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, P.O.Box 513, 5600 MB Eindhoven, The Netherlands
| | - Evgeny V Rebrov
- School of Chemistry and Chemical Engineering, Queen's University Belfast, Stranmillis Road, Belfast BT9 5AG, United Kingdom
| | - Kari Eränen
- Laboratory of Industrial Chemistry and Reaction Engineering, Process Chemistry Centre, Abo Akademi University, Biskopsgatan 8, FIN-20500 Turku/Abo, Finland
| | - Faysal Benaskar
- Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, P.O.Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jan Meuldijk
- Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, P.O.Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jyri-Pekka Mikkola
- Laboratory of Industrial Chemistry and Reaction Engineering, Process Chemistry Centre, Abo Akademi University, Biskopsgatan 8, FIN-20500 Turku/Abo, Finland
| | - Volker Hessel
- Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, P.O.Box 513, 5600 MB Eindhoven, The Netherlands
| | - Lumbertus A Hulshof
- Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, P.O.Box 513, 5600 MB Eindhoven, The Netherlands
| | - Dmitry Yu Murzin
- Laboratory of Industrial Chemistry and Reaction Engineering, Process Chemistry Centre, Abo Akademi University, Biskopsgatan 8, FIN-20500 Turku/Abo, Finland
| | - Jaap C Schouten
- Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, P.O.Box 513, 5600 MB Eindhoven, The Netherlands
| |
Collapse
|
33
|
Jovanović J, Rebrov EV, Nijhuis TA(X, Kreutzer MT, Hessel V, Schouten JC. Liquid–Liquid Flow in a Capillary Microreactor: Hydrodynamic Flow Patterns and Extraction Performance. Ind Eng Chem Res 2011. [DOI: 10.1021/ie200715m] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jovan Jovanović
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Evgeny V. Rebrov
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - T. A. (Xander) Nijhuis
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - M. T. Kreutzer
- Department of Chemical Engineering, Delft University of Technology, 2628 BL Delft, The Netherlands
| | - Volker Hessel
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jaap C. Schouten
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| |
Collapse
|
34
|
Rooze J, Groote R, Jakobs RTM, Sijbesma RP, van Iersel MM, Rebrov EV, Schouten JC, Keurentjes JTF. Mechanism of Ultrasound Scission of a Silver–Carbene Coordination Polymer. J Phys Chem B 2011; 115:11038-43. [DOI: 10.1021/jp203780a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | - Maikel M. van Iersel
- AkzoNobel Industrial Chemicals, P.O. Box 247, 3800 AE Amersfoort, The Netherlands
| | - Evgeny V. Rebrov
- School of Chemistry and Chemical Engineering, Queen’s University Belfast, BT9 5AG, Belfast, United Kingdom
| | | | - Jos T. F. Keurentjes
- AkzoNobel Industrial Chemicals, P.O. Box 247, 3800 AE Amersfoort, The Netherlands
| |
Collapse
|
35
|
Rooze J, Rebrov EV, Schouten JC, Keurentjes JTF. Effect of resonance frequency, power input, and saturation gas type on the oxidation efficiency of an ultrasound horn. Ultrason Sonochem 2011; 18:209-15. [PMID: 20573535 DOI: 10.1016/j.ultsonch.2010.05.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2010] [Revised: 05/11/2010] [Accepted: 05/17/2010] [Indexed: 05/14/2023]
Abstract
The sonochemical oxidation efficiency (η(ox)) of a commercial titanium alloy ultrasound horn has been measured using potassium iodide as a dosimeter at its main resonance frequency (20 kHz) and two higher resonance frequencies (41 and 62 kHz). Narrow power and frequency ranges have been chosen to minimise secondary effects such as changing bubble stability, and time available for radical diffusion from the bubble to the liquid. The oxidation efficiency, η(ox), is proportional to the frequency and to the power transmitted to the liquid (275 mL) in the applied power range (1-6 W) under argon. Luminol radical visualisation measurements show that the radical generation rate increases and a redistribution of radical producing zones is achieved at increasing frequency. Argon, helium, air, nitrogen, oxygen, and carbon dioxide have been used as saturation gases in potassium iodide oxidation experiments. The highest η(ox) has been observed at 5 W under air at 62 kHz. The presence of carbon dioxide in air gives enhanced nucleation at 41 and 62 kHz and has a strong influence on η(ox). This is supported by the luminol images, the measured dependence of η(ox) on input power, and bubble images recorded under carbon dioxide. The results give insight into the interplay between saturation gas and frequency, nucleation, and their effect on η(ox).
Collapse
Affiliation(s)
- Joost Rooze
- Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | | | | | | |
Collapse
|
36
|
Benaskar F, Engels V, Patil N, Rebrov EV, Meuldijk J, Hessel V, Hulshof LA, Jefferson DA, Schouten JC, Wheatley AE. Corrigendum to “Copper(0) in the Ullmann heterocycle-aryl ether synthesis of 4-phenoxypyridine using multimode microwave heating” [Tetrahedron Lett. 51 (2010) 248]. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
37
|
Engels V, Benaskar F, Patil N, Rebrov EV, Hessel V, Hulshof LA, Jefferson DA, Vekemans JAJM, Karwal S, Schouten JC, Wheatley AEH. Cu-Based Nanoalloys in the Base-Free Ullmann Heterocyle-Aryl Ether Synthesis. Org Process Res Dev 2010. [DOI: 10.1021/op9003423] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
38
|
Protasova LN, Rebrov EV, Glazneva TS, Berenguer-Murcia A, Ismagilov ZR, Schouten JC. Control of the thickness of mesoporous titania films for application in multiphase catalytic microreactors. J Catal 2010. [DOI: 10.1016/j.jcat.2009.07.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
39
|
Jovanović J, Rebrov EV, Nijhuis TA(X, Hessel V, Schouten JC. Phase-Transfer Catalysis in Segmented Flow in a Microchannel: Fluidic Control of Selectivity and Productivity. Ind Eng Chem Res 2010. [DOI: 10.1021/ie9017918] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jovan Jovanović
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Evgeny V. Rebrov
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - T. A. (Xander) Nijhuis
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Volker Hessel
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jaap C. Schouten
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| |
Collapse
|
40
|
Benaskar F, Engels V, Patil N, Rebrov EV, Meuldijk J, Hessel V, Hulshof LA, Jefferson DA, Schouten JC, Wheatley AE. Copper(0) in the Ullmann heterocycle-aryl ether synthesis of 4-phenoxypyridine using multimode microwave heating. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2009.10.126] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
41
|
Berenguer-Murcia A, Rebrov EV, Cabaj M, Wheatley AEH, Johnson BFG, Robertson J, Schouten JC. Confined palladium colloids in mesoporous frameworks for carbon nanotube growth. J Mater Sci 2009; 44:6563-6570. [PMID: 33897041 PMCID: PMC8023227 DOI: 10.1007/s10853-009-3629-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2008] [Accepted: 05/19/2009] [Indexed: 06/06/2023]
Abstract
Palladium colloidal nanoparticles with an average size of approximately 2.4 nm have been incorporated into mesoporous inorganic thin films following a multistep approach. This involves the deposition of mesoporous titania thin films with a thickness of 200 nm by spin-coating on titanium plates with a superhydrophilic titania outer layer and activation by calcination in a vacuum furnace at 573 K. Nanoparticles have been confined within the porous titania network by dip-coating noble metal suspensions onto these mesoporous thin films. Finally, the resulting nanoconfined systems were used as substrates for the growth of oriented carbon nanotubes (CNTs) using plasma-enhanced chemical vapour deposition at 923 K in order to enhance their surface area. These CNTs were tested in the hydrogenation of phenylacetylene by hydrogen in a batch reactor. The initial reaction rate observed on a CNT/TiO2 structured catalyst was considerably higher than that on 1 wt% Pd/TiO2 thin films.
Collapse
Affiliation(s)
| | - Evgeny V. Rebrov
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - Maciej Cabaj
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, UK
| | - Andrew E. H. Wheatley
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, UK
| | - Brian F. G. Johnson
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, UK
| | - John Robertson
- Department of Engineering, University of Cambridge, CB2 1PZ Cambridge, UK
| | - Jaap C. Schouten
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| |
Collapse
|
42
|
Dubrovskiy AR, Rebrov EV, Kuznetsov SA, Schouten JC. A microstructured reactor/heat-exchanger for the water–gas shift reaction operated in the 533–673K range. Catal Today 2009. [DOI: 10.1016/j.cattod.2009.07.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
43
|
Rebrov EV, Klinger EA, Berenguer-Murcia A, Sulman EM, Schouten JC. Selective Hydrogenation of 2-Methyl-3-butyne-2-ol in a Wall-Coated Capillary Microreactor with a Pd25Zn75/TiO2 Catalyst. Org Process Res Dev 2009. [DOI: 10.1021/op900085b] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Evgeny V. Rebrov
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Department of Chemistry, Cambridge University, Lensfield Road, CB2 1EW Cambridge, U.K., and Tver Technical University, A. Nikitin Street, 22, Tver 170026, Russia
| | - Ekaterina A. Klinger
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Department of Chemistry, Cambridge University, Lensfield Road, CB2 1EW Cambridge, U.K., and Tver Technical University, A. Nikitin Street, 22, Tver 170026, Russia
| | - Angel Berenguer-Murcia
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Department of Chemistry, Cambridge University, Lensfield Road, CB2 1EW Cambridge, U.K., and Tver Technical University, A. Nikitin Street, 22, Tver 170026, Russia
| | - Esther M. Sulman
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Department of Chemistry, Cambridge University, Lensfield Road, CB2 1EW Cambridge, U.K., and Tver Technical University, A. Nikitin Street, 22, Tver 170026, Russia
| | - Jaap C. Schouten
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Department of Chemistry, Cambridge University, Lensfield Road, CB2 1EW Cambridge, U.K., and Tver Technical University, A. Nikitin Street, 22, Tver 170026, Russia
| |
Collapse
|
44
|
Rebrov EV, Berenguer-Murcia A, Skelton HE, Johnson BFG, Wheatley AEH, Schouten JC. Capillary microreactors wall-coated with mesoporous titania thin film catalyst supports. Lab Chip 2009; 9:503-6. [PMID: 19190784 DOI: 10.1039/b815716b] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A new method for catalyst deposition on the inner walls of capillary microreactors is proposed which allows exact control of the coating thickness, pore size of the support, metal particle size, and metal loading. The wall-coated microreactors have been tested in a selective hydrogenation reaction. Activity and selectivity reach values close to those obtained with a homogeneous Pd catalyst. The catalyst activity was stable for a period of 1000 h time-on-stream.
Collapse
Affiliation(s)
- Evgeny V Rebrov
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | | | | | | | | | | |
Collapse
|
45
|
Rebrov EV, Berenguer-Murcia A, Johnson BF, Schouten JC. Gold supported on mesoporous titania thin films for application in microstructured reactors in low-temperature water-gas shift reaction. Catal Today 2008. [DOI: 10.1016/j.cattod.2008.06.029] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
46
|
|
47
|
Schouten JC, Rebrov EV, de Croon MH. Miniaturization of Heterogeneous Catalytic Reactors: Prospects for New Developments in Catalysis and Process Engineering. Chimia (Aarau) 2002. [DOI: 10.2533/000942902777680054] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
|