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Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.51A [2012] >
IJC-A Vol.51A(09-10) [September-October 2012] >
| 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 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Source: | IJC-A Vol.51A(09-10) [September-October 2012]
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