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Title: CO2 CAPTURE BY ABSORPTION WITH POTASSIUM CARBONATE

Abstract

The objective of this work is to improve the process for CO{sub 2} capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous K{sub 2}CO{sub 3} promoted by piperazine. The baseline campaign with 30% MEA has given heat duties from 40 to 70 kcal/gmol CO{sub 2} as predicted by the stripper model. The Flexipak 1Y structured packing gives significantly better performance than IMTP 40 duped packing in the absorber, but in the stripper the performance of the two packings is indistinguishable. The FTIR analyzer measured MEA volatility in the absorber represented by an activity coefficient of 0.7. In the MEA campaign the material balance closed with an average error of 3.5% and the energy balance had an average error of 5.9.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
University of Texas at Austin
OSTI Identifier:
842830
DOE Contract Number:
FC26-02NT41440
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ABSORPTION; PERFORMANCE; POTASSIUM CARBONATES; CHEMICAL REACTION KINETICS; CARBON DIOXIDE; AIR POLLUTION CONTROL; AMINES

Citation Formats

Gary T. Rochelle, Marcus Hilliard, Eric Chen, Babatunde Oyenekan, Ross Dugas, and John McLees. CO2 CAPTURE BY ABSORPTION WITH POTASSIUM CARBONATE. United States: N. p., 2005. Web. doi:10.2172/842830.
Gary T. Rochelle, Marcus Hilliard, Eric Chen, Babatunde Oyenekan, Ross Dugas, & John McLees. CO2 CAPTURE BY ABSORPTION WITH POTASSIUM CARBONATE. United States. doi:10.2172/842830.
Gary T. Rochelle, Marcus Hilliard, Eric Chen, Babatunde Oyenekan, Ross Dugas, and John McLees. 2005. "CO2 CAPTURE BY ABSORPTION WITH POTASSIUM CARBONATE". United States. doi:10.2172/842830. https://www.osti.gov/servlets/purl/842830.
@article{osti_842830,
title = {CO2 CAPTURE BY ABSORPTION WITH POTASSIUM CARBONATE},
author = {Gary T. Rochelle and Marcus Hilliard and Eric Chen and Babatunde Oyenekan and Ross Dugas and John McLees},
abstractNote = {The objective of this work is to improve the process for CO{sub 2} capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous K{sub 2}CO{sub 3} promoted by piperazine. The baseline campaign with 30% MEA has given heat duties from 40 to 70 kcal/gmol CO{sub 2} as predicted by the stripper model. The Flexipak 1Y structured packing gives significantly better performance than IMTP 40 duped packing in the absorber, but in the stripper the performance of the two packings is indistinguishable. The FTIR analyzer measured MEA volatility in the absorber represented by an activity coefficient of 0.7. In the MEA campaign the material balance closed with an average error of 3.5% and the energy balance had an average error of 5.9.},
doi = {10.2172/842830},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2005,
month = 7
}

Technical Report:

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  • The objective of this work is to improve the process for CO{sub 2} capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous K{sub 2}CO{sub 3} promoted by piperazine. Progress has been made in this reporting period on three subtasks. A simple thermodynamic model has been developed to represent the CO{sub 2} vapor pressure and speciation of the new solvent. A rate model has been formulated to predict the CO{sub 2} flux with these solutions under absorber conditions. A process and instrumentation diagram and process flow diagram have been prepared for modifications of the existing pilot plant system.
  • The objective of this work is to improve the process for CO{sub 2} capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous K{sub 2}CO{sub 3} promoted by piperazine. Progress has been made in this reporting period on three subtasks. The rigorous Electrolyte Non-Random Two-Liquid (electrolyte-NRTL) model has been regressed to represent CO{sub 2} solubility in potassium carbonate/bicarbonate solutions. An analytical method for piperazine has been developed using a gas chromatograph. Funding has been obtained and equipment has been donated to provide for modifications of the existing pilot plant system with stainless steel materials.
  • The objective of this work is to improve the process for CO{sub 2} capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous K{sub 2}CO{sub 3} promoted by piperazine. A rigorous thermodynamic model has been developed with a stand-alone FORTRAN code to represent the CO{sub 2} vapor pressure and speciation of the new solvent. Parameters have been developed for use of the electrolyte NRTL model in AspenPlus. Analytical methods have been developed using gas chromatography and ion chromatography. The heat exchangers for the pilot plant have been ordered.
  • The objective of this work is to improve the process for CO{sub 2} capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous K{sub 2}CO{sub 3} promoted by piperazine. A rigorous thermodynamic model has been further developed with a standalone FORTRAN code to represent the CO{sub 2} vapor pressure and speciation of the new solvent. Gas chromatography has been used to measure the oxidative degradation of piperazine. The heat exchangers for the pilot plant have been received. The modifications are on schedule for start-up in November 2003.
  • The objective of this work is to improve the process for CO{sub 2} capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous K{sub 2}CO{sub 3} promoted by piperazine. A rigorous thermodynamic model has been further developed with a standalone FORTRAN code to represent the CO{sub 2} vapor pressure and speciation of the new solvent. The welding work has initiated and will be completed for a revised startup of the pilot plant in February 2004.