Redox-Mediated Separation of Carbon Dioxide from Flue Gas

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• 作者：John D. Watkins ; Nicholas S. Siefert ; Xu Zhou ; Christina R. Myers ; John R. Kitchin ; David P. Hopkinson ; Hunaid B. Nulwala
• 刊名：Energy & Fuels
• 出版年：2015
• 出版时间：November 19, 2015
• 年：2015
• 卷：29
• 期：11
• 页码：7508-7515
• 全文大小：424K
• ISSN：1520-5029

文摘

The proton-coupled electron transfer (PCET) reaction of a quinone has been used to create a pH gradient capable of the active pumping of CO₂ through a liquid membrane. The quinone redox couples, hydroquinone/benzoquinone and 2,6-dimethylbenzoquinone/2,6-dimethylhydroquinone, have been investigated in the proton transfer mechanisms associated with electron transfer in sodium bicarbonate solutions. These same conditions have then been applied to an active liquid membrane for proton pumping across a membrane electrode assembly under potential bias, acting as an active membrane for CO₂ separation. Qualitative results are reported toward the development of an active redox membrane for CO₂ separation from flue gas.