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Title: Comprehensive Exergy Analysis of Three IGCC Power Plant Configurations with CO 2 Capture

Abstract

We have conducted comprehensive exergy analyses of three integrated gasification combined cycle with carbon capture and storage (IGCC-CCS) power plant configurations: (1) a baseline model using Selexol™ for H 2S/CO 2 removal; (2) a modified version that adds a H 2-selective membrane before the Selexol™ acid gas removal system; and (3) a modified baseline version that uses a CO 2-selective membrane before the Selexol™ acid gas removal system. While holding the coal input flow rate and the CO 2 captured flow rates constant, it was determined that the H 2-selective membrane case had a higher net power output (584 MW) compared to the baseline (564 MW) and compared to the CO 2-selective membrane case (550 MW). Interestingly, the CO 2-selective membrane case destroyed the least amount of exergy within the power plant (967 MW), compared with the Baseline case (999 MW) and the H 2-membrane case (972 MW). The main problem with the CO 2-selective membrane case was the large amount of H 2 (48 MW worth of H 2 chemical exergy) remaining within the supercritical CO 2 that exits the power plant. Finally, regardless of the CO 2 capture process used, the majority of the exergy destruction occurred inmore » the gasifier (305 MW) and gas turbine (~380 MW) subsystems, suggesting that these two areas should be key areas of focus of future improvements.« less

Authors:
 [1];  [1];  [1]
  1. National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
Publication Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1479645
Resource Type:
Accepted Manuscript
Journal Name:
Energies (Basel)
Additional Journal Information:
Journal Name: Energies (Basel); Journal Volume: 9; Journal Issue: 9; Journal ID: ISSN 1996-1073
Publisher:
MDPI AG
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; exergy analysis; coal gasification; precombustion CO2 capture; process system modeling

Citation Formats

Siefert, Nicholas, Narburgh, Sarah, and Chen, Yang. Comprehensive Exergy Analysis of Three IGCC Power Plant Configurations with CO2 Capture. United States: N. p., 2016. Web. doi:10.3390/en9090669.
Siefert, Nicholas, Narburgh, Sarah, & Chen, Yang. Comprehensive Exergy Analysis of Three IGCC Power Plant Configurations with CO2 Capture. United States. doi:10.3390/en9090669.
Siefert, Nicholas, Narburgh, Sarah, and Chen, Yang. Wed . "Comprehensive Exergy Analysis of Three IGCC Power Plant Configurations with CO2 Capture". United States. doi:10.3390/en9090669. https://www.osti.gov/servlets/purl/1479645.
@article{osti_1479645,
title = {Comprehensive Exergy Analysis of Three IGCC Power Plant Configurations with CO2 Capture},
author = {Siefert, Nicholas and Narburgh, Sarah and Chen, Yang},
abstractNote = {We have conducted comprehensive exergy analyses of three integrated gasification combined cycle with carbon capture and storage (IGCC-CCS) power plant configurations: (1) a baseline model using Selexol™ for H2S/CO2 removal; (2) a modified version that adds a H2-selective membrane before the Selexol™ acid gas removal system; and (3) a modified baseline version that uses a CO2-selective membrane before the Selexol™ acid gas removal system. While holding the coal input flow rate and the CO2 captured flow rates constant, it was determined that the H2-selective membrane case had a higher net power output (584 MW) compared to the baseline (564 MW) and compared to the CO2-selective membrane case (550 MW). Interestingly, the CO2-selective membrane case destroyed the least amount of exergy within the power plant (967 MW), compared with the Baseline case (999 MW) and the H2-membrane case (972 MW). The main problem with the CO2-selective membrane case was the large amount of H2 (48 MW worth of H2 chemical exergy) remaining within the supercritical CO2 that exits the power plant. Finally, regardless of the CO2 capture process used, the majority of the exergy destruction occurred in the gasifier (305 MW) and gas turbine (~380 MW) subsystems, suggesting that these two areas should be key areas of focus of future improvements.},
doi = {10.3390/en9090669},
journal = {Energies (Basel)},
number = 9,
volume = 9,
place = {United States},
year = {2016},
month = {8}
}

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Works referenced in this record:

Baseline Flowsheet Model for IGCC with Carbon Capture
journal, October 2011

  • Field, Randall P.; Brasington, Robert
  • Industrial & Engineering Chemistry Research, Vol. 50, Issue 19, p. 11306-11312
  • DOI: 10.1021/ie200288u

CO2-selective polymeric membranes containing amines in crosslinked poly(vinyl alcohol)
journal, December 2006