Post-combustion carbon dioxide capture using electrochemically mediated amine regeneration
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Hatton_Post-combustion carbon.pdf
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Author(s)
Stern, Michael C.
Simeon, Fritz
Herzog, Howard J.
Hatton, Trevor Alan
Date Issued
June 2013
Journal
Energy & Environmental Science
Publisher
Royal Society of Chemistry
Citation
Stern, Michael C., Fritz Simeon, Howard Herzog, and T. Alan Hatton. “Post-Combustion Carbon Dioxide Capture Using Electrochemically Mediated Amine Regeneration.” Energy & Environmental Science 6, no. 8 (2013): 2505. © Royal Society of Chemistry
Version
Final published version
Abstract
Electrochemically mediated amine regeneration is a new post-combustion capture technology with the potential to exploit the excellent removal efficiencies of thermal amine scrubbers while reducing parasitic energy losses and capital costs. The improvements result from the use of an electrochemical stripping cycle, in lieu of the traditional thermal swing, to facilitate CO[subscript 2] desorption and amine regeneration; metal cations generated at an anode react with the amines, displacing the CO[subscript 2], which is then flashed off, and the amines are regenerated by subsequent reduction of the metal cations in a cathode cell. The advantages of such a process include higher CO[subscript 2] desorption pressures, smaller absorbers, and lower energy demands. Several example chemistries using different polyamines and copper are presented. Experimental results indicate an open-circuit efficiency of 54% (15 kJ per mole CO[subscript 2]) is achievable at the tested conditions and models predict that 69% efficiency is possible at higher temperatures and pressures. A bench scale system produced 1.6 mL min[superscript −1] CO[subscript 2] while operating at 0.4 volts and 42% Faradaic efficiency; this corresponds to a work of less than 100 kJ per mole.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
MIT Energy Initiative
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DOI of Published Version
https://doi.org/10.1039/C3EE41165F
