Preparation of Amphiphilic Ti/ZSM-5 Zeolite and Its Catalytic Performance in Oxidative Desulfurization†

doi:10.7503/cjcu20180770

Abstract

Abstract:

Amphiphilic Ti/ZSM-5 zeolite(am-Ti/ZSM-5) was successfully prepared by asymmetric modification of Ti/ZSM-5 zeolite with diphenylsilane and aminopropyltriethoxysilane. The modification and post-treatment process did not destroy the framework structure of zeolite. The sample showed high catalytic activity in the oxidative desulfurization(ODS) of dibenzothiophene(DBT) using H₂O₂ as the oxidant and without adding the extractant. The complete removal of DBT from the simulated oil can be achieved within 35 min. These results indicate that the unique amphiphilic structure of am-Ti/ZSM-5 makes it have excellent catalytic performance in polar-nonpolar mixtures.

Key words: Amphiphilic catalyst, Ti/ZSM-5, Dibenzothiophene, Oxidative desulfurization

CLC Number:

0643

TrendMD:

WANG Ying, SUN Chuanyin, WANG Runwei, ZHANG Zhendong, ZHANG Daming, ZHANG Zongtao, QIU Shilun. Preparation of Amphiphilic Ti/ZSM-5 Zeolite and Its Catalytic Performance in Oxidative Desulfurization^†[J]. Chem. J. Chinese Universities, 2019, 40(6): 1265.

Figures/Tables 9

Scheme 1 Synthetic process for amphiphilic zeolite

Fig.1 XRD patterns of am-Ti/ZSM-5-n(A) and various catalysts(B)

Fig.2 UV-Vis spectra of ZSM-5 and am-Ti/ZSM-5-n

Fig.3 Images of contact angle of Ti/ZSM-5-3.0(A, B) and am-Ti/ZSM-5-3.0(C, D)

Fig.4 SEM images of ZSM-5(A), Ti/ZSM-5-3.0(B) and am-Ti/ZSM-5-3.0(C)

Fig.5 TEM images of Ti/ZSM-5-3.0(A) and am-Ti/ZSM-5-3.0(B)

Fig.6 Catalytic performance of am-Ti/ZSM-5-n zeolites with various Ti-content

Fig.7 Desulfurization performance of Ti/ZSM-5-3.0(a) and am-Ti/ZSM-5-3.0(b)

Fig.8 Schematic illustration of ODS of DBT in the presence of am-Ti/ZSM-5

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