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Title: Adsorption selectivity of CO2 over N2 by cation exchanged zeolite L: Experimental and simulation studies
Authors: Dangi, Ganga P
Munusamy, K
Somani, Rajesh S
Bajaj, Hari C
Keywords: Zeolites;Alkali metals;Alkaline earth metals;Ion exchange;Gas adsorption;Carbon dioxide adsorption;Nitrogen adsorption;Grand Canonical Monte Carlo simulation
Issue Date: Sep-2012
Publisher: NISCAIR-CSIR, India
Abstract: CO2 and N2 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 N2 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 N2 adsorption varies with the nature of the exchanged cations. Zeolite-CaL shows remarkably high CO2 selectivity (31 times) over N2 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.
Page(s): 1238-1251
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.51A(09-10) [September-October 2012]

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