Extractive desulfurization of model fuels with a nitrogen-containing heterocyclic ionic liquid  

作　　者：Guojia Yu Dongyu Jin Xinyu Li Fan Zhang Shichao Tian Yixin Qu Zhiyong Zhou Zhongqi Ren 

机构地区：[1]College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029,China

出　　处：《Frontiers of Chemical Science and Engineering》2022年第12期1735-1742,共8页化学科学与工程前沿（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant Nos.22125802,22078010 and U1862113);the Big Science Project from BUCT(Grant No.XK180301).

摘　　要：A nitrogen-containing ionic liquid was synthesized using an aromatic nitrogen-containing heterocyclic and an amino acid,and applied to the extractive desulfurization process to remove benzothiophene,dibenzothiophene,and 4,6-dimethyldibenzothiphene from a model fuel oil.Chemical characterizations and simulation using Gaussian 09 software confirmed the rationality of an ionic liquid structure.Classification of non-covalent interactions between the ionic liquid and the three sulfur-containing contaminants was studied by reduced density gradient analysis.The viscosity of the ionic liquid was adjusted by addition of polyethylene glycol.Under extraction conditions of the volume of ionic liquid to oil as 1:1 and temperature as room temperature,the desulfurization selectivity of ionic liquid followed the order of 4,6-dimethyldibenzothiphene(15 min)<benzothiophene(15 min)≈dibenzothiophene(10 min).Addition of p-xylene and cyclohexene to the fuel oil had little effect.The extractant remained stable and effective after multiple regeneration cycles.

关 键 词：extractive desulfurization nitrogen-containing heterocyclic ionic liquid reduced density gradient analysis desulfurization selectivity 

分 类 号：O62[理学—有机化学]