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Hierarchically porous BEA stannosilicates as unique catalysts for bulky ketone conversion and continuous operation

Al-Nayili, Abbas, Yakabi, Keiko and Hammond, Ceri 2016. Hierarchically porous BEA stannosilicates as unique catalysts for bulky ketone conversion and continuous operation. Journal of Materials Chemistry A 4 (4) , pp. 1373-1382. 10.1039/C5TA08709K

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Abstract

Pore size limitations typically limit the applicability of Lewis acidic zeolites, such as titano- and stanno-silicates, to catalytic processes based on small-to-mid sized substrates, and increase their rates of deactivation, prohibiting further exploitation. Herein, we demonstrate that tin-containing zeolites possessing modified hierarchical BEA matrices can be prepared. These hierarchical stannosilicates are able to mediate the catalytic conversion of bulky ketone substrates, a pertaining challenge in the field that purely microporous analogues are unable to mediate. Deactivation studies in the continuous regime also demonstrate the exceptional stability of hierarchical Sn-Beta compared to purely microporous Sn-Beta, with <20% loss of activity observed over 700 h on stream. In contrast, the purely microporous analogue lost ±70% activity in only 200 h. To the best of our knowledge, this is the first time a stannosilicate with a beneficial hierarchical BEA framework has been prepared, and the first evidence of cyclododecanone valorisation with stannosilicate catalysts.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Subjects: Q Science > QD Chemistry
Publisher: Royal Society of Chemistry
ISSN: 2050-7488
Funders: The Royal Society
Date of Acceptance: 17 December 2015
Last Modified: 14 Sep 2020 15:45
URI: http://orca.cf.ac.uk/id/eprint/84372

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