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论文类型：期刊论文

发表时间：2011-04-25

发表刊物：JOURNAL OF CATALYSIS

收录刊物：SCIE、EI

卷号：279

期号：2

页面范围：269-275

ISSN号：0021-9517

关键字：Oxidative desulfurization; Dibenzothiophene; Ionic liquid; Phosphomolybdic acid; Quinoline

摘要：A hybrid material ([Bmim](3)PMo12O40) was synthesized by reacting H3PMo12O40 with the ionic liquid 1-butyl-3-methyl imidazolium bromide. SiO2-supported [Bmim](3)PMo12O40 showed a high catalytic activity in the oxidation of dibenzothiophene (DBT) with 29% H2O2 aqueous solution as the oxidant. Maximum activity was observed at a loading of 20 wt.% [Bmim](3)PMo12O40 on SiO2, and 100% DBT conversion was achieved at 60 degrees C, atmospheric pressure, and an oxygen to sulfur (O/S) molar ratio of 3.0 in 100 min. The high performance of [Bmim](3)PMo12O40/SiO2 might be attributable to its amphiphilicity, which enhances adsorption of both H2O2 and sulfur-containing compounds. [Bmim](3)PMo12O40/SiO2 could be easily separated by centrifugation and reused without deactivation after seven runs. Quinoline and carbazole had slightly positive effects on DBT oxidation, whereas indole had a negative effect. The high performance of [Bmim](3)PMo12O40 was verified in the sulfur removal from a real diesel by means of oxidation followed by dimethylformamide extraction. (C) 2011 Elsevier Inc. All rights reserved.