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Cu/SBA-15 as adsorbent for propane/propylene separation

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Abstract

Samples of mesoporous silica SBA-15 were prepared under hydrothermal conditions where Cu cations were incorporated to the structure by impregnation in order to compare the adsorption behavior in the presence and absence of this element. The adsorption/desorption equilibrium isotherms of propylene, propane, and N2 were measured to evaluate their usefulness in the propane/propylene separation.

All the adsorption isotherms of SBA-15 measured in the absence of Cu cations were described by the Freundlich equation, while the adsorption isotherms of propane on Cu/SBA-15 were better represented by the Henry equation and those of propylene were satisfactorily described by the Langmuir model in the range P < 100 Torr. The adsorption uptake of propylene increased and that of propane decreased in Cu/SBA-15 as compared to the amounts observed in the SBA-15 sample. The presence of Cu atoms in the adsorbent lattice increased the selectivity towards propylene. Under some working conditions the adsorbed amount of propylene in Cu/SBA-15 sample was totally reversible and the propane uptake, negligible.

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Acknowledgments

Authors thank the financial support provided partially by the Programa Iberoamericano de Ciencia y Tecnología (CYTED) under Project V.8 coordinated by Prof. A. Rodrigues, and also acknowledge the Consejo Nacional de Ciencia y Tecnología (CONACyT, México) for providing the Scholarship (No. 144883) for M.E.P.

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Authors and Affiliations

  1. Centro de Investigación y Desarrollo en Ciencias Aplicadas Dr Jorge J. Ronco, CINDECA (CONICET-CIC-UNLP), 47 No. 257, La Plata, Argentina

    E. I. Basaldella & J.C. Tara

  2. Centro de Investigación, Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla, México

    G. Aguilar Armenta & M. E. Patiño Iglesias

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  1. E. I. Basaldella
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  2. J.C. Tara
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  3. G. Aguilar Armenta
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  4. M. E. Patiño Iglesias
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Correspondence to E. I. Basaldella.

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Basaldella, E.I., Tara, J., Armenta, G.A. et al. Cu/SBA-15 as adsorbent for propane/propylene separation. J Porous Mater 14, 273–278 (2007). https://doi.org/10.1007/s10934-006-9062-6

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  • DOI: https://doi.org/10.1007/s10934-006-9062-6

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