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Abstract
In order to meet the future regulations, sulfur compounds have to be removed completely from fuels. A study was carried out on the process development for selective oxidation of DBT using a series of simple acid catalyst systems with hydrogen peroxide as oxidant. The sulfoxides and sulfones formed were extracted by adsorption over a silica gel column. The oxidation reactivity and mechanism were studied and explained. The optimized experimental conditions were extended to diesel for the oxidation of dibenzothiophene, 4-methyl dibenzothiophene, and 4,6-dimethyl dibenzothiophene. The sulfur reduction in diesel fuel to the desired level could be achieved using the simple mixed acid catalyst.
ACKNOWLEDGMENTS
We thank the management of Chennai Petroleum Corporation, Chennai, India, for providing analytical support, and the faculties of the Chemistry Department, College of Engineering Guindy, Anna University, Chennai, India, for extending their facility, support, and technical guidance for completing this study. We also thank the management of Indian Additives Ltd., Chennai, India, for their support extended to this project.