Deep Desulfurization of Fuels by Heteropolyanion-Based Ionic Liquid

Bulletin of the Korean chemical society

Jinlei Li¹  Bing Hu¹  Chuanqun Hu¹ 

关键词: Oxidative desulfurization;    Extraction;    Dibenzothiophene;    Molybdovanadophosphoric acid;    Ionic liquid;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

A new heteropolyanion-based ionic ([Hmim]5PMo10V2O40) was synthesized by the reaction of molybdovanadophosphoric acid (H5PMo10O40) with N-methylimidazole. [Hmim]5PMo10V2O40 showed a high catalytic activity in the oxidative desulfurization of sulfur-containing compounds in 1-methylimidazolium tetrafluoroborate ([Hmim]BF4) ionic liquid using 30% aqueous H2O2 as the oxidant. The catalytic system was of high activity, simplified workup and flexible recyclability. The catalytic oxidation reactivity of sulfur-containing compounds decreased in the order dibenzothiophene (DBT) > 4,6-dimethyldibenzothiophene (4,6-DMDBT) > benzothiophene (BT). The influences of various parameters including reaction time (t) and temperature (T), catalyst dosage, and oxidant to sulfur molar ratio n(O)/n(S) on the desulfurization of model oil were investigated in details. 99.1% of DBT conversion in the model oil was achieved at atmospheric pressure under the optimal conditions: n(O)/n(S) = 4:1, 60 oC, 100 min and molar ratio of catalyst to sulfur of 0.062. The ionic liquid can be recycled six times without significant decrease in activity.

【 授权许可】

Unknown