Post-Combustion

An Advanced Catalytic Solvent for Lower Cost Post-Combustion CO2 Capture in a Coal-fired Power Plant
Project No.: DE-FE0012926


The University of Kentucky is testing an advanced catalyzed amine solvent coupled with a membrane dewatering component. The system will be used with a heat-integration process to reduce the energy of regeneration and show higher mass transfer, and lower capital cost, for post-combustion CO2 capture. A homogeneous catalyst is being used for enhanced scrubber kinetics. This approach uses small molecule organometallic mimics of the enzyme carbonic anhydrase to convert CO2 into bicarbonate. The catalytic process has been shown to increase mass transfer rates 15-40 percent compared to the un-catalyzed amine. The process will use a previously developed advanced solvent that has improved thermal stability as compared to monoethanolamine (MEA). An integrated membrane dewatering process will be applied that preferentially permeates water from the CO2 rich amine solution at the bottom of the absorber tower. The higher CO2 concentration rich process solution is then sent to the stripper while the water rich permeate is sent back to the absorber. An integrated 0.1 MW thermal bench-scale testing unit with coal derived flue gas will be used to achieve the following objectives: minimized regeneration energy; enhanced mass transfer; increased thermal stability of the solvent; increased concentration of the rich solution from dewatering; and long-term stability of the solvent and catalyst with exposure to coal-derived flue gas contaminants.

Components of the University of Kentucky Center for Applied Energy Research Catalytic Solvent Capture Process
Components of the University of Kentucky Center for
Applied Energy Research Catalytic Solvent Capture Process

Related Papers and Publications:

Contacts:

  • For further information on this project, contact the NETL Project Manager, José Figueroa.
StayConnected Facebook Twitter LinkedIn RssFeed YouTube