Analysis of carbon dioxide-to-methanol direct electrochemical conversion mediated by an ionic liquid |
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| Affiliation: | 1. Chemical Engineering Department, Higher Institution of Center of Excellence: Centre for Biofuel and Biochemical Research, Institute of Self-Sustainable Building, Universiti Teknologi PETRONAS, 32610 Bandar Seri Iskandar, Perak, Malaysia;2. Division of Materials Science, Faculty of Advanced Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan;1. Department of Chemistry, College of Science, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea;2. School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea;3. KEPCO Research Institute, Korea Electric Power Corporation, 105 Munji-ro, Yuseong-gu, Daejeon 34056, Republic of Korea;4. Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea;1. State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, 2999 Ren’min North Road, Shanghai 201620, PR China;2. EVT Power Inc.Unit 150, 13260 Delf Place, Richmond, BC, V6V 2A2, Canada;3. INRS Énergie Matériaux Télécommunication, 1650 boul. Lionel Boulet, CP 1020 Varennes, QC J3X 1S2, Canada;1. Department of Chemical and Biomolecular Engineering, University of Cantabria, Avenida de los Castros s/n, 39005 Santander, Cantabria, Spain;2. The PhotoCatalytic Synthesis (PCS) Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology, University of Twente, Enschede, 7500 AE, Netherlands;1. Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea;2. Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea |
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| Abstract: | An intensified process for carbon dioxide capture and conversion is proposed and analyzed, considering an electrochemical parallel plate reactor which processes a CO2-charged stream from an absorption unit at 40 °C and atmospheric pressure and where the target product of the conversion is methanol.The task-specific ionic liquid 1-(3-aminopropyl)-3-methylimidazolium bromide was selected, synthesized and characterized. This ionic liquid has shown a good absorption capacity, high ionic conductivity, high chemical–electrochemical stability and acts as a charged intermediate (CO2*−) stabilizer, enabling the electrochemical reduction of absorbed CO2.The electrical energy in the electrochemical reactor was estimated to be 8.683 kWh kg (CO2)−1 or 115.16 g (CO2) kWh−1, too high to ensure the environmental sustainability of the process. A low concentration of carbon dioxide in the liquid phase, at ambient conditions, implies the need for a high electrode area for the process and is a major hindrance to improving the economy of the process. |
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| Keywords: | Carbon dioxide Electrochemical conversion Ionic liquid Absorption Reduction reaction 1-(3-Aminopropyl)-3-methylimidazolium bromide |
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