Johan C. Groen

TL;DR: In this article, the pore size distributions derived from adsorption isotherms of micro- and mesoporous materials are identified and discussed based on new results and examples reported in the recent literature.

TL;DR: This critical review examines recent advances in the rapidly evolving area of zeolite with improved accessibility and molecular transport and particularly dwells on the exciting field of hierarchical zeolites, which couple in a single material the catalytic power of micropores and the facilitated access and improved transport consequence of a complementary mesopore network.

TL;DR: A 2 orders of magnitude gas transport improvement in a medium pore ZSM-5 zeolite has been achieved upon introduction of intracrystalline mesoporosity in gradient-free crystals by desilication post-treatment in alkaline medium.

TL;DR: In this paper, an optimal molar Si/Al ratio in the range of 25-50 has been identified for mesoporous ZSM-5 zeolites with preserved structural integrity, and a successive combination of post-treatments, in which desilication is followed by dealumination, enables a decoupled modification of the mesopore and acidic properties.

TL;DR: The existence of framework Al sites in different T positions that are more or less susceptible to the alkaline treatment, and the occurrence of re-alumination, are tentative explanations for the remarkable behaviour of Al in the desilication process.