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CO2 Capture by Absorption With Potassium Carbonate Quarterly Report

Description: 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{sub 2} varied from 3 to 12% CO{sub 2} and the gas rate varied from 0.5 to 3 kg/m{sup 2}-s.
Date: July 29, 2004
Creator: Rochelle, Gary T.; Chen, Eric; Cullinane, J.Tim; Hilliard, Marcus; Lu, Jennifer; Oyenekan, Babatunde et al.
Partner: UNT Libraries Government Documents Department

CO2 Capture by Absorption With Potassium Carbonate Quarterly Report

Description: 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.
Date: July 31, 2005
Creator: Rochelle, Gary T.; Hilliard, Marcus; Chen, Eric; Oyenekan, Babatunde; Dugas, Ross & McLees, John
Partner: UNT Libraries Government Documents Department