Optimization of energy requirements for CO2 post-combustion capture process through advanced thermal integration

Bravo, Julio; Drapanauskaite, Donata; Sarunac, Nenad; Romero, Carlos; Jesikiewicz, Thomas; Baltrusaitis, Jonas

doi:10.1016/j.fuel.2020.118940

Optimization of energy requirements for CO₂ post-combustion capture process through advanced thermal integration

Journal Article · Fri Aug 14 00:00:00 EDT 2020 · Fuel

DOI:https://doi.org/10.1016/j.fuel.2020.118940· OSTI ID:1851707

Bravo, Julio ^[1]; Drapanauskaite, Donata ^[2]; Sarunac, Nenad ^[3]; Romero, Carlos ^[4]; Jesikiewicz, Thomas ^[5]; ^[2]

Lehigh Univ., Bethlehem, PA (United States). Energy Research Center; Lehigh Univ., Bethlehem, PA (United States)
Lehigh Univ., Bethlehem, PA (United States). Dept. of Chemical and Biomolecular Engineering
Univ. of North Carolina, Charlotte, NC (United States). Mechanical Engineering and Engineering Science
Lehigh Univ., Bethlehem, PA (United States). Energy Research Center
AES Eastern Energy, L.P., Barker, NY (United States)

The energy optimization modeling work described here was performed to determine efficiency improvements that could be achieved for existing coal-fired power plants to retrofit a partial CO₂ capture from the post-combustion flue gas for carbon sequestration through thermal integration. The work presented includes optimization of the mono-ethanol amine (MEA)-based post-combustion CO₂ capture to reduce energy requirements that could be achieved at existing power plants by thermal integration of the steam turbine cycle, boiler, CO₂ compression train and post-combustion CO₂ capture process to offset efficiency and capacity losses that would be incurred by retrofit or implementation of post-combustion CO₂ capture. Furthermore, partial CO₂ capture, involving treatment of less than 100% of the flue gas leaving the plant and modular design of the CO₂ scrubbing system, was also investigated. Thermal integration of the steam turbine cycle with boiler and CO₂ compression train improved cycle and plant performance and offset, in part, the negative effects of post-combustion CO₂ capture. The best-analyzed integration options improved gross power output by 5% and net unit efficiency by 1.57%, relative to the conventional MEA process. Operating with 40% CO₂ capture increased gross power output by 11.6–14% (depending on the MEA thermal integration option), relative to the conventional MEA integration and 90% CO₂ capture. The improvement in net unit performance is larger compared to the improvement in turbine cycle performance because of the CO₂ compression work, which is also reduced by partial CO₂ capture.

View Accepted Manuscript (DOE)

Research Organization:: Georgia Institute of Technology, Atlanta, GA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012577

OSTI ID:: 1851707

Alternate ID(s):: OSTI ID: 1775781

Journal Information:: Fuel, Journal Name: Fuel Journal Issue: C Vol. 283; ISSN 0016-2361

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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42 ENGINEERING
54 ENVIRONMENTAL SCIENCES
CO2 capture
Efficiency
Energy & Fuels
Engineering
Flue gas
Heat integration
MEA
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Optimization of energy requirements for CO2 post-combustion capture process through advanced thermal integration

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Optimization of energy requirements for CO₂ post-combustion capture process through advanced thermal integration