Adsorption selectivity of CO2 over N-2 by cation exchanged zeolite L: Experimental and simulation studies

作者：Dangi Ganga P; Munusamy K; Somani Rajesh S^*; Bajaj Hari C

来源：Indian Journal of Chemistry - Section A: Inorganic, Physical, Theoretical and Analytical Chemistry , 2012, 51(9-10): 1238-1251.

• Zeolites
• Alkali metals
• Alkaline earth metals
• Ion exchange
• Gas adsorption
• Carbon dioxide adsorption
• Nitrogen adsorption
• Grand Canonical Monte Carlo simulation

CO2 and N-2 adsorptions of alkali and alkaline earth metal cation exchanged zeolite L have been investigated by volumetric measurements and Grand Canonical Monte Carlo simulation. The zeolite KL shows lower degree of exchange because of its unique open-channel framework, linked cancrinite and intercage sites. Structural characteristics have been evaluated using X-ray diffraction analysis and surface area measurements. CO2 and N-2 adsorption isotherms have been obtained for zeolite KL and its cation exchanged form up to 101.3 kPa at 293 and 303 K and the corresponding heats of adsorption estimated by the Clausius-Clapeyron equation. The experimental results are compared with those obtained from GCMC simulation. The texture of the materials and their selectivity for CO2 over N-2 adsorption varies with the nature of the exchanged cations. Zeolite-CaL shows remarkably high CO2 selectivity (31 times) over N-2 amongst the studied alkali and alkaline cation exchanged zeolite L. It has been shown that zeolite L can be used as a potential adsorbent for the removal of CO2 from industrial effluent gases.

• 出版日期2012-10
• 单位海洋化工研究院有限公司