Optimization study on deep extractive oxidative desulfurization with tetrabutylammonium bromide/polyethylene glycol DES
Yanwen Guo, Xingjian Liu, Jingwen Li, Bing Hu
Abstract
was fully utilized by the new TBAB/PEG-200 desulfurization system in step extractive oxidative desulfurization. The reaction conditions were optimized further, and O/S = 8, DES/oil = 1 : 5, 40 °C and 75 minutes were chosen as the best reaction conditions. Meanwhile, other organic sulfides in crude oil were also removed, and the removal rates of DBT, 4,6-dimethyldibenzothiophene and benzothiophene were 99.65%, 96.71% and 93.52%, respectively. The DES was reused 7 times, and the desulfurization efficiency of the regenerated DES for DBT was maintained at 98.14%. Finally, the possible mechanism of the synergistic effect of two kinds of hydrogen bonds and the oxidant was proposed.
Topics & Concepts
Flue-gas desulfurizationDibenzothiopheneBenzothiopheneChemistryPolyethylene glycolFourier transform infrared spectroscopyBromideNuclear chemistryOrganic chemistryThiopheneChemical engineeringEngineeringCatalysis and Hydrodesulfurization StudiesCatalytic Processes in Materials ScienceNanomaterials for catalytic reactions