Deep desulfurization of model oil using surfactant-type decatungstates as catalysts

I&EC 37

Xue Jiang1, Huaming Li, lihm@ujs.edu.cn1, Wenshuai Zhu1, Huoming Shu2, Yan Wang1, and Lining He1. (1) College of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, China, (2) Department of Chemistry, Hainan Normal University, Haikou, 570228, China
A series of surfactant-type decatungstates such as [C16H33N(CH3)3]4W10O32, [C14H29N(CH3)3]4W10O32, [C12H25N(CH3)3]4W10O32, [C10H21N(CH3)3]4W10O32, [(C4H9)4N]4W10O32 have been synthesized and haracterized by IR?UV-Vis?gravimetric determination and TG/DSC. With the above decatungstates as catalysts, we have studied the oxidative desulfurization of dibenzothiophene (DBT) in model gas oil with aqueous 30% hydrogen peroxide. The catalysts also perform as the surfactant, making a promising improvement on the removal of sulfur. In the experiments, n(DBT) : n(H2O2) : n(catalyst) = 1: 10: 0.01, the results show that the catalytic ability increases with increasing length of the substituted alkane. Of all the decatungstates, [C16H33N(CH3)3]4W10O32 exhibits highest activity. After the reaction with [C16H33N(CH3)3]4W10O32 at 70ºC for 3h, the sulfur content was reduced from 1000 ppm to 14 ppm, reaching a sulfur removal of 98.6%.
 

IEC Poster Session
8:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Industrial & Engineering Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007