Synthesis of hierarchical TS-1 zeolite via a novel three-step crystallization method and its excellent catalytic performance in oxidative desulfurization

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• 作者：Qi Du ; Yiping Guo ; ^{ypguo@sjtu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Huanan Duan ; Hua Li ; Yujie Chen ; Hezhou Liu ; ^{hzhliu@sjtu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Hierarchical TS-1 ; PVA ; Mesopore ; Oxidative desulfurization ; Dibenzothiophene
• 刊名：Fuel
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：188
• 期：Complete
• 页码：232-238
• 全文大小：1804 K

文摘

Hierarchical TS-1 (HTS-1) zeolite has been successfully synthesized through a novel three-step crystallization method by using a cheap and eco-friendly polymer PVA as the mesopore template. The HTS-1 particles possess an interesting stacking structure and are constructed of smaller crystals with an average diameter of 30 nm. The mesopores of HTS-1 are formed by the stacking of the smaller TS-1 nanocrystals. The catalytic results show that the HTS-1 exhibits much higher catalytic activity than conventional TS-1 in the oxidative desulfurization of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) due to the presence of intracrystal mesopores. In addition, the three-step crystallization method plays a key role in the preparation of HTS-1, which effectively solves the problem that PVA is unstable and unsuitable to be used as mesopore template under high crystallization temperature.