Electroreduction of CO2/CO to C2 Products: Process Modeling, Downstream Separation, System Integration, and Economic Analysis
| Autor: | Andrew R. T. Morrison, Bert De Mot, Mahinder Ramdin, Paul A. Webley, Leo J. P. van den Broeke, Wiebren de Jong, J. P. Martin Trusler, Othonas A. Moultos, Ruud Kortlever, Thijs J. H. Vlugt, Tom Breugelmans, Penny Xiao |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Process modeling
Ethylene General Chemical Engineering General Chemistry Chemical Engineering Electrochemistry Industrial and Manufacturing Engineering 09 Engineering Article Reduction (complexity) chemistry.chemical_compound Separation system Chemical engineering chemistry Downstream (manufacturing) Carbonate Economic analysis 03 Chemical Sciences |
| Zdroj: | Industrial & Engineering Chemistry Research Industrial and Engineering Chemistry Research, 60(49) |
| ISSN: | 1520-5045 0888-5885 |
| Popis: | Direct electrochemical reduction of CO2 to C2 products such as ethylene is more efficient in alkaline media, but it suffers from parasitic loss of reactants due to (bi)carbonate formation. A two-step process where the CO2 is first electrochemically reduced to CO and subsequently converted to desired C2 products has the potential to overcome the limitations posed by direct CO2 electroreduction. In this study, we investigated the technical and economic feasibility of the direct and indirect CO2 conversion routes to C2 products. For the indirect route, CO2 to CO conversion in a high temperature solid oxide electrolysis cell (SOEC) or a low temperature electrolyzer has been considered. The product distribution, conversion, selectivities, current densities, and cell potentials are different for both CO2 conversion routes, which affects the downstream processing and the economics. A detailed process design and techno-economic analysis of both CO2 conversion pathways are presented, which includes CO2 capture, CO2 (and CO) conversion, CO2 (and CO) recycling, and product separation. Our economic analysis shows that both conversion routes are not profitable under the base case scenario, but the economics can be improved significantly by reducing the cell voltage, the capital cost of the electrolyzers, and the electricity price. For both routes, a cell voltage of 2.5 V, a capital cost of $10,000/m2, and an electricity price of |
| Databáze: | OpenAIRE |
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