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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. 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.

Authors:
; ; ; ;
Publication Date:
Research Org.:
The University of Texas at Austin (US)
Sponsoring Org.:
(US)
OSTI Identifier:
821854
DOE Contract Number:
FC26-02NT41440
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Apr 2003
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CARBON DIOXIDE; ABSORPTION; SORPTIVE PROPERTIES; POTASSIUM CARBONATES; THERMODYNAMIC MODEL; VAPOR PRESSURE; AIR POLLUTION CONTROL

Citation Formats

Gary T. Rochelle, Eric Chen, J. Tim Cullinane, Marcus Hilliard, and Terraun Jones. CO2 CAPTURE BY ABSORPTION WITH POTASSIUM CARBONATE. United States: N. p., 2003. Web. doi:10.2172/821854.
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Gary T. Rochelle, Eric Chen, J. Tim Cullinane, Marcus Hilliard, & Terraun Jones. CO2 CAPTURE BY ABSORPTION WITH POTASSIUM CARBONATE. United States. doi:10.2172/821854.
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Gary T. Rochelle, Eric Chen, J. Tim Cullinane, Marcus Hilliard, and Terraun Jones. Tue . "CO2 CAPTURE BY ABSORPTION WITH POTASSIUM CARBONATE". United States. doi:10.2172/821854. https://www.osti.gov/servlets/purl/821854.
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@article{osti_821854,
title = {CO2 CAPTURE BY ABSORPTION WITH POTASSIUM CARBONATE},
author = {Gary T. Rochelle and Eric Chen and J. Tim Cullinane and Marcus Hilliard and Terraun Jones},
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. 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.},
doi = {10.2172/821854},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 01 00:00:00 EST 2003},
month = {Tue Apr 01 00:00:00 EST 2003}
}
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Technical Report:
View Technical Report (0.77 MB)
DOI:  10.2172/821854
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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 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.

  • ; ; ; ...
    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. CO{sub 2} mass transfer rates are second order in piperazine concentration and increase with ionic strength. Modeling of stripper performance suggests that 5 m K{sup +}/2.5 m PZ will require 25 to 46% less heat than 7 m MEA. The first pilot plant campaign was completed on June 24. The CO{sub 2} penetration through the absorber with 20 feet of Flexipac{trademark} 1Y varied from 0.6 to 16% as the inlet CO{submore » 2} varied from 3 to 12% CO{sub 2} and the gas rate varied from 0.5 to 3 kg/m{sup 2}-s.« less