Physicochemical characterization of porous materials: Spatially resolved accessibility of zeolite crystals

Abstract

Blocked pores: Hydrocarbon diffusion and coke profile measurements were used to study zeolite pore accessibility. For mordenite crystals the accessible length of the micropores (red bars in picture) is as low as 30% of the value expected from the crystal size. New analysis strategies are advocated for micro- and mesoporous materials, for which the performance in adsorption, separation, and catalysis is strongly affected by accessibility. © 2005 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.