NDLI: Post-combustion carbon dioxide capture using electrochemically mediated amine regeneration

Content Provider	Royal Society of Chemistry (RSC)
Author	Herzog, Howard Hatton, T. Alan Simeon, Fritz Stern, Michael C.
Copyright Year	2013
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 CO2 desorption and amine regeneration; metal cations generated at an anode react with the amines, displacing the CO2, 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 CO2 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 CO2) 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−1 CO2 while operating at 0.4 volts and 42% Faradaic efficiency; this corresponds to a work of less than 100 kJ per mole.
Starting Page	2505
Ending Page	2517
Page Count	13
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	6
Issue Number	8
Journal	Energy & Environmental Science
DOI	10.1039/c3ee41165f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Electrochemistry Anode Cathode Copper Nevus
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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