HOU Liangpei, ZHAO Rongxiang, LI Xiuping, et al. Preparation of methylimidazole hydrochloride/oxalic acid type deep eutectic solvent and its application in oxidative desulfurization of model oil[J]. CIESC Journal, 2016, (9): 3972-3980.
HOU Liangpei, ZHAO Rongxiang, LI Xiuping, et al. Preparation of methylimidazole hydrochloride/oxalic acid type deep eutectic solvent and its application in oxidative desulfurization of model oil[J]. CIESC Journal, 2016, (9): 3972-3980.DOI: 10.11949/j.issn.0438-1157.20160330.
Methylimidazole hydrochloride/oxalic acid ([HMIM]Cl/H2C2O4) type deep eutectic solvent was synthesized by a simple heating and stirring mixture of methyl imidazole hydrochloride and oxalic acid. The removal of dibenzothiophene (DBT) in model oil was carried out by using[HMIM]Cl/H2C2O4 as a catalyst and hydrogen peroxide as oxidant. The effect of different reaction parameters such as different desulfurization system
reaction temperature
catalyst amount
molar ratio of hydrogen peroxide to sulfur and the type of sulfur-containing compounds in oil on the desulfurization rate was investigated. The experimental results indicated that the removal rate of DBT can reach 92.2% under the optimum conditions of 5 ml model oil
1.25 ml of[HMIM]Cl/H2C2O4 and O/S mole ratio of 12 in 140 min and 40℃. The kinetics analysis showed that the oxidative desulfurization system was in accord with the first order reaction kinetics equation. The catalyst was reused for 7 times without significant decrease in activity.