Hits:

Indexed by:期刊论文

Date of Publication:2011-01-01

Journal:FUEL PROCESSING TECHNOLOGY

Included Journals:SCIE、EI

Volume:92

Issue:1

Page Number:106-111

ISSN No.:0378-3820

Key Words:Oxidative desulfurization; H2O2; MoO3/gamma-Al2O3; DBT

Abstract:An efficient process to remove organic sulfur compounds from model fuel has been explored. Dibenzothiophene (DBT) and 4, 6-dimethyldibenzothiophene (4, 6-DMDBT) can be completely oxidized into their corresponding sulfones by H2O2 over 14 wt.% MoO3/gamma-Al2O3 catalyst under mild conditions in 15 min. The effects of solvent, initial sulfide concentration, loading of MoO3 and amount of catalyst on oxidative removal of DBT were studied. The employments of solvents have decreased the reaction rate of DBT, which can be attributed to the competitive adsorption between the sulfide and solvent. The oxidative reactivity increases in the order of thiophene (Th)<benzothiophene (BT) <DBT<4, 6-DMDBT. The catalyst can be regenerated by methanol washing at 333 K. (C) 2010 Elsevier B.V. All rights reserved.