期刊
SUSTAINABLE PRODUCTION AND CONSUMPTION
卷 32, 期 -, 页码 318-329出版社
ELSEVIER
DOI: 10.1016/j.spc.2022.05.005
关键词
Methanol and electricity generation; Coke oven gas; Economic analysis; Blast furnace gas; Thermodynamic analyses
资金
- King Saud University, Riyadh, Saudi Arabia [RSP-2021/363]
This study aims to develop an economically viable novel process for the co-generation of methanol and electricity from coke oven gas and blast furnace gas. Two processes are proposed and evaluated based on energy efficiency, exergy efficiency, net CO2 emission, and total production cost. The results show that the process utilizing additional hydrogen is more feasible in terms of energy efficiency, production cost, and environmental impact.
This study aims to develop an economically viable novel process with high thermodynamic efficiency for the co-generation of methanol and electricity from coke oven gas (COG) and blast furnace gas (BFG). For this purpose, two processes are proposed to utilize COG and BFG. In process A, syngas is obtained from COG reforming, and BFG, after providing the required heat for the reformer, is injected into the methanol synthesis reactor as a rich carbon source. In process B, in addition to the above-mentioned, additional hydrogen is injected into the methanol reactor to enhance carbon dioxide conversion. The performance of the proposed systems is evaluated using energy efficiency, exergy efficiency, net CO2 emission, and total production cost. Results show that energy efficiencies for processes A and B are 53.53% and 72.8%, and their exergy efficiencies are 23% and 26%, respectively. Moreover, environmental analysis demonstrates that process B has a net CO2 emission of -1.82 kg(CO2)/kg(methanol), while for process A, this parameter is relatively higher, and it is positive. From the economic viewpoint, it is concluded that process B is more feasible, and the total production cost of methanol decreases by 87.62% compared to process A. Also, it can be deduced that in the case of utilizing additional hydrogen electricity and methanol production from COG and BFG is interesting from the thermodynamic and economic point of view, and due to negative net CO(2)emission, it is environmentally desirable, too. (C) 2022 Published by Elsevier Ltd on behalf of Institution of Chemical Engineers.
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