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Extra-large-pore zeolites: bridging the gap between micro and mesoporous structures.

Research paper by Jiuxing J Jiang, Jihong J Yu, Avelino A Corma

Indexed on: 09 Apr '10Published on: 09 Apr '10Published in: Angewandte Chemie International Edition



Abstract

The conditions required to produce zeolites with low framework density and extra-large pores are discussed. Correlations between framework stability and geometrical and topological descriptors are presented. An attempt has been made to rationalize the synthesis of extra-large-pore zeolites in terms of the synthesis mechanism, the directing effect of the organic structure directing agent (OSDA), the framework atoms, and the gel concentration. Extra-large-pore zeolites, including the recently discovered chiral mesoporous ITQ-37, are described and their catalytic and adsorption properties discussed. Finally, strategies are presented for the preparation of extra-large-pore zeolites with different pore topologies that can fulfill pre-established catalytic and adsorption targets.