Ultrasound-assisted, base-catalyzed oxidation of 4,6-dimethyldibenzothiophene in a biphasic diesel-acetonitrile system

被引：80
作者：
Deshpande, A [1 ]
Bassi, A [1 ]
Prakash, A [1 ]
机构：
[1] Univ Western Ontario, Fac Engn, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada
来源：
ENERGY & FUELS | 2005年 / 19卷 / 01期
关键词：
D O I：
10.1021/ef0340965
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
New stricter regulations are being imposed on diesel quality for sulfur content worldwide. Recalcitrant aromatic sulfur compounds such as 4,6-dimethyldibenzothiophene (4,6-DMDBT) are resistant to removal by hydrodesulfurization, because of their low reactivity and sterically hindering structure. Oxidative desulfurization is one of the alternatives that are being investigated for this purpose. In this study, an oxidative system composed of sodium carbonate and hydrogen peroxide was investigated in a biphasic system of diesel and acetonitrile. Ultrasonic methods were applied for the intensive mixing of the biphasic system. The effects of different operating conditions-including temperature, amount of oxidant, and the base concentration-were investigated. Reduction of the DMDBT content by >90% was achieved in the diesel samples. The activation energy of pseudo-first-order reaction for DMDBT was determined to be 57 kJ/mol.
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页码：28 / 34
页数：7
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