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Indexed by:期刊论文

Date of Publication:2013-02-15

Journal:CHEMICAL ENGINEERING JOURNAL

Included Journals:SCIE、EI

Volume:218

Page Number:425-432

ISSN No.:1385-8947

Key Words:Zeolite; Sn-Beta; Steam-assisted conversion; B-V oxidation; Cyclohexanone

Abstract:Sn-Beta zeolites were prepared by a rapid and clean steam-assisted conversion (SAC) method from dry stannosilicate gel. The amorphous gel was converted to highly crystalline Sn-Beta within 5 h at mild reaction temperature of 453 K. The properties of the as-prepared samples were characterized by XRD, SEM, UV-Vis, UV-Raman, ICP and N-2 adsorption. A high gel conversion to BEA can be obtained with Sn4+ inserted in the zeolite framework. The SAC method was successfully used to produce pure silica Beta zeolite (Si/Sn = infinity) to Sn-Beta zeolite with 3.8 wt.% SnO2 (i.e., Si/Sn = 83). The Sn-Beta prepared by SAC method is an efficient catalyst for Baeyer-Villiger (B-V) reaction of cyclohexanone to epsilon-caprolactone. (C) 2012 Elsevier B.V. All rights reserved.