Abstract
The recent interest in electrochemical methods of carbon capture has thus far focused either on static adsorbent-type electrodes, which require complex gas distribution and release engineering, or aqueous flowing systems, which allow capture over large, distributed areas and release from a centralized point, but require large amounts of water. Here, we advance a concept for a flowing, electrochemically mediated carbon capture process by utilizing redox-active molecules that are liquid at room temperature, avoiding the need for large water feeds. To demonstrate the potential of this concept, we employed a liquid quinone sorbent with added glyme to aid in salt solubilization coupled to a ferrocene-derived counter electrolyte. We achieved good electrochemical stability and continuous capture and release of CO2 in a full bench scale process. Our concept for continuous-flow electrochemical CO2 capture suggests many areas for further study, particularly the need for novel cell concepts and designs.
| Original language | English |
|---|---|
| Pages (from-to) | 221-239 |
| Number of pages | 19 |
| Journal | Joule |
| Volume | 6 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 19 Jan 2022 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2021 Elsevier Inc.
Funding
The authors gratefully acknowledge Shell’s New Energies Research and Technology (NERT) Dense Energy Carriers program for providing funding for this work. Y.L. acknowledges the support of a postdoctoral research grant from the MIT Department of Chemical Engineering. K.D. acknowledges support from an appointment to the Intelligence Community Postdoctoral Research Fellowship Program at the Massachusetts Institute of Technology , administered by the Oak Ridge Institute for Science and Education (ORISE) through an interagency agreement between the U.S. Department of Energy and the Office of the Director of National Intelligence (ODNI). The authors gratefully acknowledge Shell's New Energies Research and Technology (NERT) Dense Energy Carriers program for providing funding for this work. Y.L. acknowledges the support of a postdoctoral research grant from the MIT Department of Chemical Engineering. K.D. acknowledges support from an appointment to the Intelligence Community Postdoctoral Research Fellowship Program at the Massachusetts Institute of Technology, administered by the Oak Ridge Institute for Science and Education (ORISE) through an interagency agreement between the U.S. Department of Energy and the Office of the Director of National Intelligence (ODNI). Conceptualization, Y.L. and T.A.H.; methodology, K.M.D. and Y.L.; investigation, K.M.D. and Y.L.; resources, N.O. and H.S.; visualization, Y.L. and K.M.D.; writing?original draft, K.M.D.; writing?review & editing, K.M.D. Y.L. N.O. H.S. and T.A.H.; funding acquisition, Y.L. and T.A.H.; supervision, T.A.H. The authors declare no competing interests.
| Funders | Funder number |
|---|---|
| MIT Department of Chemical Engineering | |
| NERT | |
| Shell's New Energies Research and Technology | |
| Shell’s New Energies Research and Technology | |
| U.S. Department of Energy | |
| Oak Ridge Institute for Science and Education | |
| Massachusetts Institute of Technology | |
| Office of the Director of National Intelligence | |
| Intelligence Community Postdoctoral Research Fellowship Program |
Keywords
- carbon capture
- electrochemistry
- quinone
- redox flow
- separations
