Propane/propylene separation by selective olefin adsorption on Cu/SBA-15 mesoporous silica |
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Authors: | E I Basaldella J C Tara G Aguilar Armenta M E Patiño-Iglesias E Rodríguez Castellón |
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Institution: | 1. Research & Development Center in Applied Sciences “Dr Jorge J. Ronco” (CINDECA), CONICET-CIC-National La Plata University, 47 No. 257, CP 1900, La Plata, Argentina 2. Centro de Investigación, Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, México 3. Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Málaga, Espa?a
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Abstract: | 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. |
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Keywords: | SBA-15 Propane/propylene separation Olefin selective adsorption |
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