CO2 Capture by Absorption with Potassium Carbonate

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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. The pilot plant data have been reconciled using 17% inlet CO{sub 2}. A rate-based model demonstrates that the stripper is primarily controlled by liquid film mast transfer resistance, with kinetics at vacuum and diffusion of reactants and products at normal pressure. An additional major unknown ion, probably glyoxylate, has been observed in MEA degradation. Precipitation of gypsum may be a feasible approach to removing sulphate from amine solutions and providing for ... continued below

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Rochelle, Gary T.; Chen, Eric; Oyenekan, Babatunde; Sexton, Andrew; Davis, Jason; Hilliard, Marcus et al. July 28, 2006.

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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 pilot plant data have been reconciled using 17% inlet CO{sub 2}. A rate-based model demonstrates that the stripper is primarily controlled by liquid film mast transfer resistance, with kinetics at vacuum and diffusion of reactants and products at normal pressure. An additional major unknown ion, probably glyoxylate, has been observed in MEA degradation. Precipitation of gypsum may be a feasible approach to removing sulphate from amine solutions and providing for simultaneous removal of CO{sub 2} and SO{sub 2}. Corrosion of carbon steel in uninhibited MEA solution is increased by increased amine concentration, by addition of piperazine, and by greater CO{sub 2} loading.

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  • Report No.: none
  • Grant Number: FC26-02NT41440
  • DOI: 10.2172/889472 | External Link
  • Office of Scientific & Technical Information Report Number: 889472
  • Archival Resource Key: ark:/67531/metadc884743

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Creation Date

  • July 28, 2006

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 9, 2016, 3:35 p.m.

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Rochelle, Gary T.; Chen, Eric; Oyenekan, Babatunde; Sexton, Andrew; Davis, Jason; Hilliard, Marcus et al. CO2 Capture by Absorption with Potassium Carbonate, report, July 28, 2006; United States. (digital.library.unt.edu/ark:/67531/metadc884743/: accessed December 9, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.