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Fagan-Endres MA, Odidi MD, Harrison STL. An accurate residence time distribution measurement method for low volumetric flowrate systems, with application to heap leaching columns. CHEM ENG COMMUN 2023. [DOI: 10.1080/00986445.2023.2169679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Marijke A. Fagan-Endres
- Centre for Bioprocess Engineering Research, Department of Chemical Engineering, University of Cape Town, Cape Town, South Africa
| | - Michael D. Odidi
- Centre for Bioprocess Engineering Research, Department of Chemical Engineering, University of Cape Town, Cape Town, South Africa
| | - Susan T. L. Harrison
- Centre for Bioprocess Engineering Research, Department of Chemical Engineering, University of Cape Town, Cape Town, South Africa
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A Review on Deactivation and Regeneration of Catalysts for Dimethyl Ether Synthesis. ENERGIES 2022. [DOI: 10.3390/en15155420] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
The deactivation of catalysts and their regeneration are two very important challenges that need to be addressed for many industrial processes. The most quoted reasons for the deterioration of dimethyl ether synthesis (DME) concern the sintering and the hydrothermal leaching of copper particles, their migration to acid sites, the partial formation of copper and zinc hydroxycarbonates, the formation of carbon deposits, and surface contamination with undesirable compounds present in syngas. This review summarises recent findings in the field of DME catalyst deactivation and regeneration. The most-used catalysts, their modifications, along with a comparison of the basic parameters, deactivation approaches, and regeneration methods are presented.
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Behloul CR, Smahi A, Commenge JM, Castel C. Influence of heat-transfer resistances in an optimized multifunctional reactor. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Salique F, Musina A, Winter M, Yann N, Roth PMC. Continuous Hydrogenation: Triphasic System Optimization at Kilo Lab Scale Using a Slurry Solution. FRONTIERS IN CHEMICAL ENGINEERING 2021. [DOI: 10.3389/fceng.2021.701910] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Despite their widespread use in the chemical industries, hydrogenation reactions remain challenging. Indeed, the nature of reagents and catalysts induce intrinsic safety challenges, in addition to demanding process development involving a 3-phase system. Here, to address common issues, we describe a successful process intensification study using a meso-scale flow reactor applied to a hydrogenation reaction of ethyl cinnamate at kilo lab scale with heterogeneous catalysis. This method relies on the continuous pumping of a catalyst slurry, delivering fresh catalyst through a structured flow reactor in a continuous fashion and a throughput up to 54.7 g/h, complete conversion and yields up to 99%. This article describes the screening of equipment, reactions conditions and uses statistical analysis methods (Monte Carlo/DoE) to improve the system further and to draw conclusions on the key influential parameters (temperature and residence time).
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Skoneczny S, Cioch-Skoneczny M. Determination of steady-states of a bubble column bioreactor with biofilm for aerobic processes. Chem Eng Res Des 2021. [DOI: 10.1016/j.cherd.2021.01.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Dorostkar E, Khademi MH, Rahimi A. Modeling of Slurry Bubble‐Column Reactors with Emphasis on the Importance of Bubble Size Estimation. Chem Eng Technol 2021. [DOI: 10.1002/ceat.202000231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Elham Dorostkar
- University of Isfahan Department of Chemical Engineering College of Engineering Isfahan Iran
| | - Mohammad Hasan Khademi
- University of Isfahan Department of Chemical Engineering College of Engineering Isfahan Iran
| | - Amir Rahimi
- University of Isfahan Department of Chemical Engineering College of Engineering Isfahan Iran
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Rafiee A. Staging of di-methyl-ether (DME) synthesis reactor from synthesis gas (syngas): Direct versus indirect route. Chem Eng Res Des 2020. [DOI: 10.1016/j.cherd.2020.08.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Mondal U, Yadav GD. Perspective of dimethyl ether as fuel: Part II- analysis of reactor systems and industrial processes. J CO2 UTIL 2019. [DOI: 10.1016/j.jcou.2019.02.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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A green industrial scale di-methyl ether reactor with aiming to CO 2 reduction: staging and multi-objective optimization approach. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.09.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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