Title: Redox-Mediated Separation of Carbon Dioxide from Flue Gas

Journal Article · · Energy and Fuels
 [1];  [1];  [2];  [1];  [3];  [1];  [4]
  1. National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
  2. Liquid Ion Solutions, LLC, Pittsburgh, PA (United States)
  3. Carnegie Mellon Univ., Pittsburgh, PA (United States). Department of Chemical Engineering
  4. Liquid Ion Solutions, LLC, Pittsburgh, PA (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States). Department of Chemistry
+ Show Author Affiliations

We report 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. Lastly, qualitative results are reported toward the development of an active redox membrane for CO2 separation from flue gas.

Research Organization:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Organization:
USDOE
OSTI ID:
1479648
Journal Information:
Energy and Fuels, Journal Name: Energy and Fuels Journal Issue: 11 Vol. 29; ISSN 0887-0624
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Investigating Electrode Flooding in a Flowing Electrolyte, Gas‐Fed Carbon Dioxide Electrolyzer journal December 2019

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY