Separability of carbon dioxide from methane using MFI zeolite–silica film deposited on gamma-alumina support

Silicalite-1, Na-ZSM-5 and B-ZSM-5 zeolite crystals were grown on a mesoporous silica layer to form MFI zeolite asymmetric layer for separation of CO 2 from CO 2/CH 4 binary mixture. Silicalite-1 demonstrated the highest crystallinity followed by B-ZSM-5 and Na-ZSM-5. The cubical and rectangular MFI...

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Bibliographic Details
Published in:Microporous and mesoporous materials 2009-05, Vol.121 (1), p.138-144
Main Authors: Othman, M.R., Tan, S.C., Bhatia, S.
Format: Article
Language:English
Subjects:
Carbon dioxide
Chemistry
Colloidal state and disperse state
Exact sciences and technology
Gas separation
General and physical chemistry
Ion-exchange
Methane
Porous materials
Secondary growth
Surface physical chemistry
Zeolite
Zeolites: preparations and properties
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Summary:Silicalite-1, Na-ZSM-5 and B-ZSM-5 zeolite crystals were grown on a mesoporous silica layer to form MFI zeolite asymmetric layer for separation of CO 2 from CO 2/CH 4 binary mixture. Silicalite-1 demonstrated the highest crystallinity followed by B-ZSM-5 and Na-ZSM-5. The cubical and rectangular MFI zeolite crystal structures exhibited random orientation. The crystals appeared to interlock and entwine with each other to form a continuously polycrystalline film covering the surface of the silica support. Results from the permeation test indicated that the selectivity and permeation flux of CO 2 decreased as the temperature was increased but they increased with increase in pressure. B-ZSM-5 showed the highest CO 2/CH 4 selectivity of 8.17 followed by Na-ZSM-5 and silicalite-1 crystals with selectivity of 6.28 and 2.23, respectively.
ISSN:1387-1811
1873-3093
DOI:10.1016/j.micromeso.2009.01.019