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Conversion of CO2 to CO gas using molten CaCl2 and ZrO2 anode

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/67371

Title: Conversion of CO2 to CO gas using molten CaCl2 and ZrO2 anode
Authors: Suzuki, Ryosuke O. Browse this author →KAKEN DB
Matsuura, Fumiya Browse this author
Natsui, Shungo Browse this author
Kikuchi, Tatsuya Browse this author
Issue Date: Oct-2017
Publisher: The Iron and Steel Institute of Japan
Citation: Proceedings of 1st International Conference on Energy and Material Efficiency and CO2 Reduction in the Steel Industry (EMECR2017), October 11-13, 2017, Kobe, Japan.
Journal Title: Proceedings of 1st International Conference on Energy and Material Efficiency and CO2 Reduction in the Steel Industry (EMECR2017)
Start Page: 350
End Page: 353
Abstract: Preferential decomposition of CO2 gas to CO gas was examined by using a combination of CaCl2-CaO melt as a reaction media and ZrO2-8mol% Y2O3 solid-state electrolyte as anode. The conversion ratio of CO2 to CO became larger at the higher temperature, and approached the maximum (88.2%) at 1273 K. The highest CO concentration was generated at cell voltage of 2.55 V, which is close to theoretical decomposition voltage of CaO. Therefore, in addition to calciothermic reaction between precipitated Ca and CO2 gas bubbles, CO2 decomposes preferentially via the decomposition reaction of carbonate ions. Namely CO2 gas dissolves to form CO3 2- under coexistence of CaO in the melt, CO3 2- precipitates carbon or CO gas bubbles on the cathode, and a part of carbon reacts with the blown CO2 gas to form CO. CO gas is used as an effective fuel with easy handling in steel plants.
Conference Name: International Conference on Energy and Material Efficiency and CO2 Reduction in the Steel Industry (EMECR)
Conference Sequence: 1
Conference Place: Kobe
Type: proceedings
URI: http://hdl.handle.net/2115/67371
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 鈴木 亮輔

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