Propane/propylene separation by selective olefin adsorption on Cu/SBA-15 mesoporous silica

Samples of mesoporous silica, SBA-15, were prepared under hydrothermal conditions and Cu cations were incorporated into the framework by two different impregnation techniques. The corresponding adsorption/desorption isotherms of propylene, propane, and N2 were measured to evaluate the material'...

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Bibliographic Details
Published in:Journal of sol-gel science and technology 2006-02, Vol.37 (2), p.141-146
Main Authors: Basaldella, E I, Tara, J C, G Aguilar Armenta, Patiño-Iglesias, M E, E Rodríguez Castellón
Format: Article
Language:English
Subjects:
Adsorption
Impregnation
Paraffins
Propane
Propylene
Selectivity
Separation
Silicon dioxide
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Summary:Samples of mesoporous silica, SBA-15, were prepared under hydrothermal conditions and Cu cations were incorporated into the framework by two different impregnation techniques. The corresponding adsorption/desorption isotherms of propylene, propane, and N2 were measured to evaluate the material's effectiveness in the separation of propane/propylene mixtures.Adsorption uptake of propylene increased and that of propane decreased in Cu containing samples as compared to the uptakes observed in undoped SBA-15 samples. It was demonstrated that the presence of Cu atoms in the adsorbent lattice led to a greater selectivity towards propylene. Furthermore, the highest level of Cu(I) were obtained in samples prepared by equilibrium impregnation, which in turn improved the olefin/paraffin uptake ratio. Under some working conditions, the amount of propylene adsorbed in selected samples is totally reversible while propane uptake was negligible.
ISSN:0928-0707
1573-4846
DOI:10.1007/s10971-006-6434-y