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Title: Effects of site occupancy, cation relocation, and pore geometry on adsorption kinetics in ETS-4
Authors: Marathe, R.P.
Farooq, S. 
Srinivasan, M.P. 
Issue Date: 3-Mar-2005
Citation: Marathe, R.P., Farooq, S., Srinivasan, M.P. (2005-03-03). Effects of site occupancy, cation relocation, and pore geometry on adsorption kinetics in ETS-4. Journal of Physical Chemistry B 109 (8) : 3257-3261. ScholarBank@NUS Repository.
Abstract: Strontium-exchanged titanium silicate, Sr-ETS-4, is a new molecular sieve with promises for exciting applications in gas separation. The literature mentions poor thermal stability and low adsorption capacity as the drawbacks of the as-synthesized Na-ETS-4 and therefore the need for cation exchange. Upon ion exchange, Sr-ETS-4 shows appreciable kinetic selectivity between methane and nitrogen, which can be improved further by controlled dehydration. In this study, we trace the changes at the molecular level behind this improvement. By combining distributed information in the literature, it is shown that the governing factors are changes in pore geometry with progressive dehydration, changes in ion occupancy, and relocation of cations due to Sr exchange. © 2005 American Chemical Society.
Source Title: Journal of Physical Chemistry B
ISSN: 15206106
DOI: 10.1021/jp0461192
Appears in Collections:Staff Publications

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