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Maqbool M, Parveen N, Jaffar S, Hassan SU, Mahmood A, Al-Masry W, Kim T, Han SK, Park CH, Razzaque S, Akhter T. CO 2-Free Ethylene Oxide Production via Liquid-Phase Epoxidation with Fe 2O 3/MSM Catalyst. Chem Asian J 2024; 19:e202400002. [PMID: 38525873 DOI: 10.1002/asia.202400002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 03/24/2024] [Accepted: 03/25/2024] [Indexed: 03/26/2024]
Abstract
In this study, we present an approach for ethylene oxide (EO) production that addresses environmental concerns by eliminating greenhouse gas emissions. Our catalyst, Fe2O3/MSM, was synthesized using a hydrothermal method, incorporating Fe2O3 nanoparticles into a well-structured mesoporous silica matrix (MSM). We selected peracetic acid as the oxidant, enabling CO2-free EO production while yielding valuable by-products such as acetic acid, monoethylene glycol, and diethylene glycol. X-ray diffraction (XRD), X- ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) analyses confirmed the heteroatom structure of the catalysts and porosity, while Transmission electron microscopy (TEM) analysis provided insights into its morphology. Then, the synthesized catalyst was used in the liquid-phase epoxidation of ethylene for EO production. Our systematic experiments involved varying critical parameters such as temperature, ethylene to oxidant ratio, catalyst dosage, and solvent to optimize EO selectivity and ethylene conversion. The results of this study demonstrated an 80.2 % ethylene conversion to EO with an EO selectivity of 87.6 %. The production process yielded valuable by-products without CO2 emissions, highlighting its environmental friendliness.
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Affiliation(s)
- Muhammad Maqbool
- Department of Chemistry, University of Management and Technology C-II, Johar Town, 54770, Lahore, Pakistan
| | - Nazia Parveen
- Department of Chemistry, University of Management and Technology C-II, Johar Town, 54770, Lahore, Pakistan
| | - Saima Jaffar
- Department of Chemistry, University of Management and Technology C-II, Johar Town, 54770, Lahore, Pakistan
| | - Sadaf Ul Hassan
- Department of Chemistry, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Asif Mahmood
- Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia
| | - Waheed Al-Masry
- Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia
| | - Taewook Kim
- Department of Chemical and Biological Engineering, Gachon University, Seongnam, 13120, Republic of Korea
| | - Soo-Kyung Han
- Department of Chemical and Biological Engineering, Gachon University, Seongnam, 13120, Republic of Korea
| | - Chan Ho Park
- Department of Chemical and Biological Engineering, Gachon University, Seongnam, 13120, Republic of Korea
| | - Shumaila Razzaque
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka, 44/51, 01-224, Warszawa, Poland
| | - Toheed Akhter
- Department of Chemical and Biological Engineering, Gachon University, Seongnam, 13120, Republic of Korea
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Mahmoud N, Awassa J, Toufaily J, Lebeau B, Daou TJ, Cormier M, Goddard JP. Heterogeneous Photoredox Catalysis Based on Silica Mesoporous Material and Eosin Y: Impact of Material Support on Selectivity of Radical Cyclization. Molecules 2023; 28. [PMID: 36677607 DOI: 10.3390/molecules28020549] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/16/2022] [Accepted: 12/23/2022] [Indexed: 01/09/2023]
Abstract
Heterogenization of the photocatalyst appears to be a valuable solution to reach sustainable processes. Rapid and efficient synthesis of supported photocatalyst is still a remaining challenge and the choice of the support material is crucial. The present study aims at preparing a new generation of hybrid inorganic/organic photocatalysts based on silica mesoporous material and Eosin Y. These results highlight the influence of non-covalent interactions between the material support and the reagent impacting the selectivity of the reaction.
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Chang YC, Bai H, Li SN, Kuo CN. Bromocresol green/mesoporous silica adsorbent for ammonia gas sensing via an optical sensing instrument. Sensors (Basel) 2011; 11:4060-72. [PMID: 22163836 DOI: 10.3390/s110404060] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 03/18/2011] [Accepted: 03/18/2011] [Indexed: 11/29/2022]
Abstract
A meso-structured Al-MCM-41 material was impregnated with bromocresol green (BG) dye and then incorporated into a UV-Vis DRA spectroscopic instrument for the online detection of ammonia gas. The absorption response of the Al-MCM-41/BG ammonia sensing material was very sensitive at the optical absorption wavelength of 630 nm. A high linear correlation was achieved for ppmv and sub-ppmv levels of ammonia gas. The response time for the quantitative detection of ammonia gas concentrations ranging from 0.25 to 2.0 ppmv was only a few minutes. The lower detection limit achieved was 0.185 ppmv. The color change process was fully reversible during tens of cycling tests. These features together make this mesoporous Al-MCM-41 material very promising for optical sensing applications.
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