Recovery of CO2 from flue gas using an electrochemical membrane |
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| Affiliation: | 1. School of Chemical Engineering, State Key Laboratory of Fine Chemicals, Research and Development Center of Membrane Science and Technology, Dalian University of Technology, Dalian, 116024, China;2. School of Petroleum and Chemical Engineering, State Key Laboratory of Fine Chemicals, Research and Development Center of Membrane Science and Technology, Dalian University of Technology, Dalian, 116024, China;1. School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan, 44919, Republic of Korea;2. Department of Advanced Materials and Chemical Engineering, Catholic University of Daegu, 13-13 Hayang-ro, Hayang-yep, Gyeongsan, Gyeongbuk, 38430, Republic of Korea;3. Hydrogen Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea;4. Department of Earth Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea;1. Chemical Process Intensification, Eindhoven University of Technology, Department of Chemical Engineering and Chemistry, Eindhoven, The Netherlands;2. Norwegian University of Science and Technology, Department of Energy and Process Engineering, Trondheim, Norway;3. SINTEF Materials and Chemistry, Flow Technology Department, Trondheim, Norway;4. Group of Catalysis and Porous Materials, School of Chemical Engineering and Analytical Science, University of Manchester, Manchester, United Kingdom |
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| Abstract: | A novel process has been designed for the economic production of very pure carbon dioxide from flue gas. Using a molten carbonate fuel cell stack as an electrically-driven membrane concentrator, a portion of the carbon dioxide in the flue gas, along with some oxygen, is emitted as a product stream. The oxygen is recycled to enrich the flue gas entering the concentrator. Preliminary economics appear favorable, with carbon dioxide produced at $21 per ton, this product is, however, in a binary mixture with oxygen and must be separated for final use, this mixture is suitable for standard means of separation. The cost is sensitive to the cost of electricity and the installed cost of the fuel-cell stack, as can be seen in Table 1. The projected cost, however, is significantly below the typical $70 per ton sales price for carbon dioxide, so that the process could be viable at higher electricity and equipment charges. |
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