论文信息 - Evaluation of dual-bed pressure swing adsorption for CO2 recovery from boiler exhaust gas

Evaluation of dual-bed pressure swing adsorption for CO2 recovery from boiler exhaust gas

Dual-bed CO2 adsorption using zeolite was studied experimentally and theoretically. Boiler exhaust gas (13 vol% CO2, 79 vol% N2 and 8 vol% O2) was used as a feed gas for the eight-step four-bed PSA process. Na-X type zeolite (NaX) and Na-A type zeolite (NaA) were selected in the break-through test. NaX has higher CO2 adsorption capacity than other adsorbents. NaA has the highest selectivity among all adsorbents tested. In the simulations, a NaX-to-NaA ratio affected the recovery efficiency and the concentration of recovery gas. Moreover, in the dual-bed PSA process of NaX-to-NaA ratio=2/1, the recovery efficiency and CO2 concentration of recovery gas were higher than those in a single-adsorbent PSA process. Simulated results by the dynamic model agreed well with the PSA experimental results.

[1] Chang-Ha Lee,et al. Adsorption dynamics of a layered bed PSA for H2 recovery from coke oven gas , 1998 .

[2] Inez Y. Fung,et al. Global climate changes as forecast by Goddard Institute for Space Studies three‐dimensional model , 1988 .

[3] R. T. Yang,et al. Concentration and recovery of carbon dioxide from flue gas by pressure swing adsorption , 1993 .

[4] Jan Paul Pradier,et al. Carbon dioxide chemistry : environmental issues , 1994 .

[5] B. Eliasson. CO2 Chemistry: An Option for CO2 Emission Control? , 1994 .

[6] M. Steinberg. History of CO2 greenhouse gas mitigation technologies , 1992 .

[7] J. Yoshino,et al. Development of inorganic membranes by sol-gel method for CO2 separation , 1999 .

[8] Alexander Wokaun,et al. Greenhouse Gas Control Technologies , 1999 .

[9] M. Fujii,et al. Development of flue gas carbon dioxide recovery technology , 1992 .

[10] Ravi Kumar,et al. Pressure Swing Adsorption Process: Performance Optimum and Adsorbent Selection , 1994 .