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On the synthesis and performance of hierarchical nanoporous TS-1 catalysts

Adedigba, Abdul-Lateef, Sankar, Gopinathan, Catlow, Charles Richard, Du, Yonghua, Xi, Shibo and Borgna, Armando 2017. On the synthesis and performance of hierarchical nanoporous TS-1 catalysts. Microporous and Mesoporous Materials 244 , pp. 83-92. 10.1016/j.micromeso.2017.02.048

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Abstract

Hierarchical TS-1 zeolite was successfully prepared using chitosan as a sacrificial template. The X-ray diffraction showed that the presence of chitosan with the synthesis precursor had no deleterious effect on the crystallinity and phase purity of this zeolite. X-ray absorption spectroscopy at the Ti K-edge, FTIR and Raman spectroscopies revealed the titanium ions in the zeolite structure have predominantly tetrahedral coordination. However, it appears that the higher chitosan content in the synthesis gel imparted some hydrophilic character to the TS-1 system. Furthermore, the technique adopted for the preparation of the synthesis gel – e.g partially dried or fully dried – appears to affect the amount of framework titanium in the zeolite structure. The calcined form of the chitosan templated TS-1 zeolites exhibited higher cyclohexene conversion compared to the TS-1 material synthesised without this template, but these catalysts showed lower selectivity for cyclohexene epoxide.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Cardiff Catalysis Institute (CCI)
Chemistry
Subjects: Q Science > QD Chemistry
Uncontrolled Keywords: Hierarchical TS-1; Chitosan; Cyclohexene epoxidation; Hydrogen peroxide; XANES; Hydrophobic; Hydrophilic
Publisher: Elsevier
ISSN: 1387-1811
Funders: EPSRC
Date of First Compliant Deposit: 11 May 2017
Date of Acceptance: 13 February 2017
Last Modified: 02 Jul 2019 13:37
URI: http://orca-mwe.cf.ac.uk/id/eprint/100511

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