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

doi:10.1016/j.cherd.2019.05.053

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

Mechanical and Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

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 language	English
Pages (from-to)	11-20
Number of pages	10
Journal	Chemical Engineering Research and Design
Volume	148
DOIs	https://doi.org/10.1016/j.cherd.2019.05.053
State	Published - Aug 2019

Bibliographical note

Publisher Copyright:
© 2019 Institution of Chemical Engineers

Funding

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.

Funders	Funder number
U.S. Department of Energy EPSCoR	DE-FE 0007395
National Energy Technology Laboratory

Keywords

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

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

Access to Document

10.1016/j.cherd.2019.05.053

Cite this

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title = "Evaluation of different solvent performance in a 0.7 MWe pilot scale CO2 capture unit",

abstract = "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.",

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AU - Frimpong, Reynolds A.

AU - Nikolic, Heather

AU - Pelgen, Jonathan

AU - Ghorbanian, Mahyar

AU - Figueroa, Jose D.

AU - Liu, Kunlei

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N2 - 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.

AB - 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.

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