Evaluation of different solvent performance in a 0.7 MWe pilot scale CO2 capture unit

Reynolds A. Frimpong, Heather Nikolic, Jonathan Pelgen, Mahyar Ghorbanian, Jose D. Figueroa, Kunlei Liu

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Novel concepts for post-combustion CO2 capture have been demonstrated in a 0.7 MWe pilot-scale facility installed at Kentucky Utilities (KU) E.W. Brown Generating Station. The process which includes two-staged solvent stripping used a secondary air stripper to provide leaner regenerated solvents, and recycled CO2 to boiler to boost inlet CO2 concentrations to the absorber for enhanced mass transfer and increased solvent capacity. The effectiveness of the secondary stripper together with other aspects of the heat-integrated process and the associated energy savings have been demonstrated from solvent campaigns with 30 wt% monoethanolamine (MEA) and other advanced solvents. Comparative analysis between advanced solvents showed that intercooling in the absorber had a more significant impact on the performance of the solvent with known high CO2 partial pressure as a result of the corresponding low heat of reaction with relative higher bicarbonate content from its reaction with CO2. The energy of regeneration of this solvent was lower than MEA at similar test conditions.

Original languageEnglish
Pages (from-to)11-20
Number of pages10
JournalChemical Engineering Research and Design
StatePublished - Aug 2019

Bibliographical note

Funding Information:
The authors would like to acknowledge the U.S Department of Energy National Energy Technology Laboratory (U.S DOE, NETL) for the primary financial support of this project ( DE-FE 0007395 ). The authors are grateful for the additional support provided by Louisville Gas and Electric & Kentucky Utilities (LGE&KU), Duke Energy, Electric Power Research Institute, Inc. (EPRI), Kentucky Power and the Kentucky Department for Energy Development and Independence (KY DEDI). The authors would like to thank the UKy-CAER technical and operations team including Len Goodpaster, Otto Hoffman, Marshall Marcum, Andy Placido and Amanda Warriner. The authors would also like to thank everyone at KU E.W. Brown Station for serving as the host side and for their support of the project.

Publisher Copyright:
© 2019 Institution of Chemical Engineers


  • Advanced solvents
  • CO absorption
  • Heat integration
  • Pilot-scale
  • Power plant
  • Process intensification

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)


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