Energetics of electrochemically mediated amine regeneration process for flue gas CO2 capture
By Wang, Miao; Hariharan, Subrahmaniam; Shaw, Ryan A.; Hatton, T. Alan
Published in International Journal of Greenhouse Gas Control
2019
Abstract
The electrochemically mediated amine regeneration (EMAR) process presents an alternative route to the conventional thermal regeneration of amines for carbon capture from a flue gas source. In this study, chemical and electrochemical measurements were performed to validate the speciation and activity coefficient models that describe the solution thermodynamics. Electrochemical kinetics and efficiencies were identified and process level energetic calculations were performed using these validated models to understand the effects of various operating parameters on the energy demand for CO2 capture. An isothermal EMAR process requires about 52 kJe/molCO2, and the net energy demand can be reduced to about 37 kJe/molCO2 if waste heat is available at temperatures below 90
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