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Received April 14, 2022
Accepted September 15, 2022
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Process modeling of syngas conversion to ethanol and acetic acid via the production of dimethyl ether and its carbonylation
1School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Korea 2School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea 3Department of Chemical Engineering, Ajou University, Suwon 16499, Korea 4Department of Energy Systems Research, Ajou University, Suwon 16499, Korea
wblee@snu.ac.kr
Korean Journal of Chemical Engineering, December 2022, 39(12), 3204-3213(10), 10.1007/s11814-022-1297-7
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Abstract
A process model was developed to simulate the generation of ethanol or acetic acid by selectively using syngas from coke oven gas as the carbon source. The simulation involved three reactors: the first reactor converts syngas into dimethyl ether over a hybrid Cu/ZnO/Al2O3/ferrierite catalyst; in the second reactor, carbonylation of dimethyl ether to methyl acetate takes place. The kinetic parameters for the carbonylation reaction were estimated by fitting the model to the experimental results. The third reactor uses the hydrogenation or hydrolysis of the methyl acetate to selectively synthesize ethanol or acetic acid, respectively. In the integrated process, a recycling loop was introduced, and its effects on the conversion, carbon molar yield, energy consumption, and capital and utility costs were evaluated. The results show that the recycling loop could enhance the carbon molar yield by approximately 20 times compared to that in the open-loop case owing to the high overall conversion (91-97%) of dimethyl ether in the second reactor.
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References
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