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Mesostructured silica SBA-16 with tailored intrawall porosity part 2: Diffusion

Oliver C. Gobin, Qinglin Huang, Hoang Vinh-Thang, Freddy Kleitz, Mladen Eic, Serge Kaliaguine

Journal Article: Journal of Physical Chemistry C 01/2007; 111:3059-3065.

Abstract

In this Part 2 of the present work, the diffusivities of n-heptane, cumene, and mesitylene in the SBA-16 silica samples described in Part I have been measured by the zero length column (ZLC) method. A comparison is made between the diffusivities and diffusion apparent activation energies in these materials and in a series of SBA-15 samples of similar pore size and pore volume. The latter series was discussed in a previous work. Clear differences are indeed observed and rationalized in terms of differences in the pore structure of the two series of solids.

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