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论文类型：期刊论文

发表时间：2010-01-15

发表刊物：International Symposium on Catalysis

收录刊物：SCIE、EI、CPCI-S

卷号：149

期号：1-2

页面范围：122-126

ISSN号：0920-5861

关键字：Oxidative desulfurization; Cumene hydroperoxide; Dibenzothiophene; MoO3/SiO2; Calcium

摘要：Catalytic oxidation of dibenzothiophene (DBT) in decalin was performed using an oil-soluble oxidant, cumene hydroperoxide (CHP), over molybdenum oxide (MoO3) supported oil silica. The effects Of MoO3 loading, reaction time and the molar ratio of CHP/DBT were investigated. At a MoO3 loading of 15 wt%, the conversion of DBT reached 82% at 70 C, WHSV 30 h (1), and O/S molar ratio 3. Alkaline earth metals, such as Ca, Ba, Sr and Mg were introduced oil the Surface of silica, prior to the impregnation of MoO3. The results showed that the activity in the oxidation of DBT with CHP decreased in the order MoO3/Ca-SiO2 > MoO3/Ba-SiO2 > MoO3/SiO2 > MoO3/Sr-SiO2 > MoO3/Mg-SiO2. The MoO3/Ca-SiO2 catalysts were characterized by XRD The DBT conversions oil MoO3/Ca-SiO2 Catalysts with various Ca/Mo ratios were studied. When the Ca/Mo ratio was 0.05, the DBT conversion was the highest (95%) at 60 C, WHSV 30 h(-1), and C/S molar ratio 3.0. (C) 2009 Elsevier B.V All rights reserved.