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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. The stripper model with Aspen Custom Modeler and careful optimization of solvent rate suggests that 7 m MEA and 5 m K+/2.5 m PZ will be practically equivalent in energy requirement and optimum solution capacity. The multipressure stripper reduces energy consumption by 15% with a maximum pressure of 5 atm. The use of vanadium as a corrosion inhibitor will carry little risk of long-term environmental or health effects liability, but the disposal of solvent with vanadium will be subject to regulation, probably as a hazardous waste. Analysis of the pilot plant data from Campaign 1 has given values of the mass transfer coefficient consistent with the rate data from the wetted wall column. With a rich end pinch, 30% MEA should provide a capacity of 1.3-1.4 mole CO{sub 2}/kg solvent.
Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
835452
DOE Contract Number:
FC26-02NT41440
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 8 Nov 2004
Research Org:
University of Texas (US)
Sponsoring Org:
(US)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CARBON DIOXIDE; ABSORPTION; CORROSION INHIBITORS; ENERGY CONSUMPTION; MASS TRANSFER; PILOT PLANTS; POTASSIUM CARBONATES; VANADIUM; AMINES; AIR POLLUTION CONTROL