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Title: Innovative absorber/stripper configurations for CO{sub 2} capture by aqueous monoethanolamine

Abstract

The state-of-the-art technology to capture CO, from coal-fired power plants is absorption/stripping with aqueous monoethanolamine (MEA). The energy consumption in stripping can be 15-30% of the power-plant output. A rigorous rate-based model for CO{sub 2}-MEA-H{sub 2}O qas used to simulate several flowsheet alternatives that reduce the energy requirement using Aspen Plus with RateFrac. Results were calculated for vapor recompression, multipressure, and simple strippers at 5 and 10{sup o}C approach temperatures and 70, 90, and 95% CO{sub 2} removal. The 'equivalent work of steam/mole of CO{sub 2} removed' and the reboiler duty were used to compare the proposed schemes and to show the shift of energy use from work to heat. The total equivalent work for multipressure was less than that for the simple stripper by 0.03-0.12 GJ/(ton of CO{sub 2}), and the reboiler duty was less by 0.15-0.41 GJ/(ton of CO{sub 2}). The multipressure with vapor recompression is an attractive option because it utilizes the overhead water vapor latent heat to reduce reboiler duty load, recovers the work of compression to strip more CO{sub 2}, and shows more reversible behavior.

Authors:
;  [1]
  1. University of Bahrain, Isa Town (Bahrain). Dept. of Chemical Engineering
Publication Date:
OSTI Identifier:
20752215
Resource Type:
Journal Article
Resource Relation:
Journal Name: Industrial and Engineering Chemistry Research; Journal Volume: 45; Journal Issue: 8
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 20 FOSSIL-FUELED POWER PLANTS; CAPTURE; CARBON DIOXIDE; FOSSIL-FUEL POWER PLANTS; COAL; ENERGY CONSUMPTION; COMPUTERIZED SIMULATION; SCRUBBING; WATER VAPOR; COMPRESSION; FLUE GAS

Citation Formats

Jassim, M.S., and Rochelle, G.T. Innovative absorber/stripper configurations for CO{sub 2} capture by aqueous monoethanolamine. United States: N. p., 2006. Web. doi:10.1021/ie050547s.
Jassim, M.S., & Rochelle, G.T. Innovative absorber/stripper configurations for CO{sub 2} capture by aqueous monoethanolamine. United States. doi:10.1021/ie050547s.
Jassim, M.S., and Rochelle, G.T. Wed . "Innovative absorber/stripper configurations for CO{sub 2} capture by aqueous monoethanolamine". United States. doi:10.1021/ie050547s.
@article{osti_20752215,
title = {Innovative absorber/stripper configurations for CO{sub 2} capture by aqueous monoethanolamine},
author = {Jassim, M.S. and Rochelle, G.T.},
abstractNote = {The state-of-the-art technology to capture CO, from coal-fired power plants is absorption/stripping with aqueous monoethanolamine (MEA). The energy consumption in stripping can be 15-30% of the power-plant output. A rigorous rate-based model for CO{sub 2}-MEA-H{sub 2}O qas used to simulate several flowsheet alternatives that reduce the energy requirement using Aspen Plus with RateFrac. Results were calculated for vapor recompression, multipressure, and simple strippers at 5 and 10{sup o}C approach temperatures and 70, 90, and 95% CO{sub 2} removal. The 'equivalent work of steam/mole of CO{sub 2} removed' and the reboiler duty were used to compare the proposed schemes and to show the shift of energy use from work to heat. The total equivalent work for multipressure was less than that for the simple stripper by 0.03-0.12 GJ/(ton of CO{sub 2}), and the reboiler duty was less by 0.15-0.41 GJ/(ton of CO{sub 2}). The multipressure with vapor recompression is an attractive option because it utilizes the overhead water vapor latent heat to reduce reboiler duty load, recovers the work of compression to strip more CO{sub 2}, and shows more reversible behavior.},
doi = {10.1021/ie050547s},
journal = {Industrial and Engineering Chemistry Research},
number = 8,
volume = 45,
place = {United States},
year = {Wed Apr 12 00:00:00 EDT 2006},
month = {Wed Apr 12 00:00:00 EDT 2006}
}