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A New Aluminosilicate Molecular Sieve with a System of Pores between Those of ZSM-5 and Beta Zeolite

by: Manuel Moliner, Jorge González, M. Teresa Portilla, Tom Willhammar, Fernando Rey, Francisco J. Llopis, Xiaodong Zou, Avelino Corma
J. Am. Chem. Soc. In Journal of the American Chemical Society, Vol. 133, No. 24. (18 May 2011), pp. 9497-9505, doi:10.1021/ja2015394  Key: citeulike:11437356

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Abstract

A new aluminosilicate zeolite (ITQ-39) has been synthesized. This is an extensively faulted structure with very small domains that makes the structure elucidation very difficult. However, a combination of adsorption spectroscopy and reactivity studies with selected probe molecules suggests that the pore structure of ITQ-39 is related to that of Beta zeolite, with a three-directional channel system with large pores (12-MR), but with an effective pore diameter between those of Beta and ZSM-5, or a three-directional channel system with interconnected large (12-MR) and medium pores (10-MR). The pore topology of ITQ-39 is very attractive for catalysis and shows excellent results for the preparation of cumene by alkylation of benzene, while it can be a promising additive for FCC.


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