Journal
FUEL
Volume 188, Issue -, Pages 232-238Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2016.10.045
Keywords
Hierarchical TS-1; PVA; Mesopore; Oxidative desulfurization; Dibenzothiophene
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Funding
- National Natural Science Foundation of China [11474199, 51332009]
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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. (C) 2016 Elsevier Ltd. All rights reserved.
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