Synthesis of Titanium Silicalite-1 with High Catalytic Performance for 1-Butene Epoxidation by Eliminating the Extraframework Ti

Ting Zhang; Yi Zuo; Min Liu; Chunshan Song; Xinwen Guo

doi:10.1021/acsomega.6b00266

Synthesis of Titanium Silicalite-1 with High Catalytic Performance for 1-Butene Epoxidation by Eliminating the Extraframework Ti

ACS Omega. 2016 Nov 29;1(5):1034-1040. doi: 10.1021/acsomega.6b00266. eCollection 2016 Nov 30.

Authors

Ting Zhang¹, Yi Zuo¹, Min Liu¹, Chunshan Song², Xinwen Guo¹

Affiliations

¹ State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research and Department of Catalysis Chemistry and Technology, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, P. R. China.
² EMS Energy Institute, PSU-DUT Joint Center for Energy Research and Department of Energy & Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States.

Abstract

Titanium silicalite-1 (TS-1) with little extraframework Ti was hydrothermally synthesized in a tetrapropylammonium hydroxide system using starch as the additive. The influences of the amount of starch added on the coordination states of titanium ions and the functional mechanism of starch were studied by various characterization means. The addition of starch slowed the crystallization rate of TS-1 so that the insertion rate of titanium to the framework matched well with that of silicon. Therefore, the generation of extraframework Ti, including the anatase TiO₂ and octahedrally coordinated titanium, was eliminated. The catalytic performances of the TS-1 samples were evaluated in the epoxidation of 1-butene to produce butene oxide. The catalytic activity of TS-1 was improved significantly due to the increasing amount of framework Ti.