CO2 Capture by Absorption with Potassium Carbonate. Quarterly Progress Report, October 1, 2004-December 31, 2004.

Technical Information Center Oak Ridge Tennessee

关键词: Carbon dioxide;    Absorption;    Potassium carbonate;    Aqueous solutions;    Piperazines;   

RP-ID  :  DE2005837002

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The objective of this work is to improve the process for CO2 capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous K2CO3 promoted by piperazine. Thermodynamic modeling predicts that the heat of desorption of CO2 from 5m K+/2.5 PZ from 85 kJ/mole at 40C to 30 kJ/mole at 120C. Mass transfer modeling of this solvent suggests that carbonate and general salt concentration play a major role in catalyzing the rate of reaction of CO2 with piperazine. Stripper modeling suggests that with the multipressure stripper, the energy consumption with a generic solvent decreases by 15% as the heat of desorption is decreased from 23.8 to 18.5 kcal/gmol. A second pilot plant campaign with 5m K+/2.5 PZ was successfully completed.