Theses and Dissertations - UTB/UTPA

Date of Award


Document Type


Degree Name

Master of Science (MS)



First Advisor

Dr. Jason G. Parsons

Second Advisor

Dr. John Villarreal

Third Advisor

Dr. Jose Gutierrez


The oxidation of dibenzothiophene (DBT) to dibenzothiophene-sulfone has been considered as an alternate method to remove sulfur from crude oil. This study demonstrates that the oxidative desulfurization (ODS) of DBT to DBT-sulfone occurs using WO3 as a catalyst. WO3 was synthesized and characterized using X-ray diffraction to determine the phase of WO3. Each reaction was refluxed and run for four hours using WO3 as a catalyst, dibenzothiphene, and four different solvents: decahydronapthalene, n-dodecane, decalin, and dodecane. The reactions were performed at temperatures ranging from 120 oC to 150 oC. Aliquots were taken at 30 minutes for up to four hours to determine the reaction kinetics. A stoichiometry study was performed by using mole ratios DBT-WO3. These mole ratios were 1:1, 1:0.75, 1:0.50, 1:0.25, 1:0.10, and 1:0.05. The disappearance of DBT was followed using Gas Chromatography-Mass Spectrometry. In addition, the identity of the reaction product was confirmed with FT-IR and Raman Spectroscopy.


Copyright 2013 Alejandrina Rivera. All Rights Reserved.

Granting Institution

University of Texas-Pan American

Included in

Chemistry Commons