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Adsorption and diffusion of propane and propylene in Ag+-impregnated MCM-41

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Abstract

Equilibrium data and diffusion characteristics of propane and propylene were determined on mesoporous adsorbents modified with an organic molecule (APTES) and/or impregnated with AgNO3, in order to obtain a separation by adsorption via π-complexation.

Adsorption capacities were determined by a gravimetric technique, while diffusion characteristics were evaluated by the ZLC technique. The equilibrium isotherms data showed that the modification with an organic molecule will weaken the π-interaction between Ag+ and double C=C bond. On the other hand slightly higher adsorption capacities for propylene (about 1.5 mol/kg) were obtained for the sample prepared by a direct impregnation with larger amounts of AgNO3 (M4 sample).

Diffusion runs confirmed that the propane desorption rate on M4 sample was much higher compared to propylene. This evidence leads to a potential application of that adsorbent material for a kinetic separation.

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Authors and Affiliations

  1. Dipartimento di Ingegneria dei Materiali e della Produzione, Università Federico II, Napoli, Italy

    F. Iucolano, P. Aprea, D. Caputo & C. Colella

  2. Department of Chemical Engineering, University of New Brunswick, Fredericton, Canada

    M. Eić & Q. Huang

Authors
  1. F. Iucolano
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  2. P. Aprea
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  3. D. Caputo
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  4. C. Colella
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  5. M. Eić
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  6. Q. Huang
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Correspondence to F. Iucolano.

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Iucolano, F., Aprea, P., Caputo, D. et al. Adsorption and diffusion of propane and propylene in Ag+-impregnated MCM-41. Adsorption 14, 241–246 (2008). https://doi.org/10.1007/s10450-008-9106-0

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  • DOI: https://doi.org/10.1007/s10450-008-9106-0

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