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Title: CO2 Capture by Absorption with Potassium Carbonate

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. Modeling of stripper performance suggests that vacuum stripping may be an attractive configuration for all solvents. Flexipac 1Y structured packing performs in the absorber as expected. It provides twice as much mass transfer area as IMTP No.40 dumped packing. Independent measurements of CO{sub 2} solubility give a CO{sub 2} loading that is 20% lower than that Cullinane's values with 3.6 m PZ at 100-120 C. The effective mass transfer coefficient (K{sub G}) in the absorber with 5 m K/2.5 m PZ appears to be 0 to 30% greater than that of 30 wt% MEA.
Authors:
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Publication Date:
OSTI Identifier:
859276
DOE Contract Number:
FC26-02NT41440
Resource Type:
Technical Report
Research Org:
University of Texas
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ABSORPTION; MASS TRANSFER; POTASSIUM CARBONATES; SOLUBILITY; CARBON DIOXIDE; AMINES; PIPERAZINES; MATHEMATICAL MODELS; ADSORBENTS; MATERIALS TESTING