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.
- Research Organization:
- University of Texas (US)
- Sponsoring Organization:
- (US)
- DOE Contract Number:
- FC26-02NT41440
- OSTI ID:
- 835452
- Resource Relation:
- Other Information: PBD: 8 Nov 2004
- Country of Publication:
- United States
- Language:
- English
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CO2 Capture by Absorption with Potassium Carbonate
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