Issue 7, 2004

Study of n-hexane adsorption in MCM-41 mesoporous materials: a scaling effect approach of capillary condensation processes

Abstract

The adsorption of hexane on mesoporous MCM-41 materials having different pore sizes has been studied by thermodynamic means. Additional information about their textural properties has been found using the BET model and by tracing comparison plots. Extremely low CBET parameters have been found, confirming the very low affinity of alkanes for siliceous surfaces while comparison plots evidenced true mesoporous materials. The adsorbate-adsorbent interactions have been derived from the isosteric method. A correlation between the heat of condensation and the pore size has been demonstrated and is discussed. The enthalpic contribution of the liquid–gas interface to the overall process has been derived and precisely matches the difference between the enthalpy of condensation in the bulk and the enthalpy condensation in mesopores as large as 10 nm.

Graphical abstract: Study of n-hexane adsorption in MCM-41 mesoporous materials: a scaling effect approach of capillary condensation processes

Article information

Article type
Paper
Submitted
22 Jan 2004
Accepted
18 Mar 2004
First published
15 Jun 2004

New J. Chem., 2004,28, 874-879

Study of n-hexane adsorption in MCM-41 mesoporous materials: a scaling effect approach of capillary condensation processes

P. Trens, N. Tanchoux, D. Maldonado, A. Galarneau, F. Di Renzo and F. Fajula, New J. Chem., 2004, 28, 874 DOI: 10.1039/B401094A

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