Multi-step Dealumination and Incorporation of Titanium into the Framework of Natural Mordenite toward a Titanosilicate Catalyst

doi:10.3724/SP.J.1088.2011.10827

Abstract

Abstract: Titanosilicates with low cost have been prepared via multi-step incorporation of titanium into natural mordenite (MOR) using natural MOR as the precursor. The resultant Ti-MOR was characterized by X-ray diffraction, inductive coupled plasma-atomic emission spectroscopy, diffused reflectance ultraviolet-visible spectroscopy, N₂ adsorption-desorption, and temperature-programmed desorption of ammonia. The results showed that the framework of natural MOR remained during the treatment and the molar ratio of Si to Ti was low to 79. Furthermore, the well-dispersed 4-coordinated Ti was confirmed by UV-Vis spectra and the titanosilicate displayed appreciable activity in the selective oxidation of styrene using dilute H₂O₂(30%) as oxidant.

Key words: natural mordenite, multi-step dealumination, titanation, titanosilicate, styrene, partial oxidation

XIAO Li-Ping, YANG Jing, ZHOU Hui, CHEN Chun-Yu, SUN Shi-Ye, LOU Hui, ZHENG Xiao-Ming. Multi-step Dealumination and Incorporation of Titanium into the Framework of Natural Mordenite toward a Titanosilicate Catalyst[J]. Chinese Journal of Catalysis, 2012, 33(1): 199-204.

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URL: https://www.cjcatal.com/EN/10.3724/SP.J.1088.2011.10827

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