An Efficient Extraction-Free Method for Oxidative Desulfurization of Model Fuels Employing Cross-Linked Polyionic Liquid Phosphotungstate Catalysts  

作　　者：Yuan Dandan Zhang Ling Yin Guoqing Wang Yuanyuan Zhang Jiaojing 

机构地区：[1]Provincial Key Laboratory of Oil&Gas Chemical Technology,College of Chemistry&Chemical Engineering,Northeast Petroleum University,Daqing 163318,China

出　　处：《China Petroleum Processing & Petrochemical Technology》2022年第3期10-20,共11页中国炼油与石油化工（英文版）

基　　金：supported by the Natural Science Foundation of Heilongjiang Province of China (Grant No. LH2019B025)

摘　　要：An efficient extraction-free oxidative desulfurization(ODS)process using a series of cross-linked polyionic liquid phosphotungstate(CLPIL-PW)catalysts is reported.The cross-linked PILs were prepared with DVB and 1-n-alkyl-3-vinyl imidazole hydrobromide(alkyl=ethyl,butyl,octyl,dodecyl),and were then assembled with phosphotungstic acid(H_(3)PW_(12)O_(40))to form the catalysts.The CLPIL-PWs have been applied to the oxidative removal of dibenzothiophene(DBT)from model oil with H_(2)O_(2) as an oxidant.The effects of ionic liquid(IL)cationic species,varying the DVB/IL molar ratio in the polymerization process,and varying operating conditions were investigated.The CLPIL-PWs were characterized by inductively coupled plasma(ICP)mass spectrometry,elemental analysis,scanning electron microscopy(SEM),Fourier transform infra-red(FTIR)spectroscopy,X-ray diffraction(XRD),^(13)C and^(31)P nuclear magnetic resonance(NMR)spectroscopy.The polydivinylbenzene-co-1-n-octyl-3-vinyl imidazole phosphotungstate(P(DVB-OVIm)PW)exhibited the highest DBT removal efficiency(99.9%)and remarkable recyclability,and could be reused eight times without reducing its activity.Finally,an extraction-free ODS mechanism is proposed.

关 键 词：DESULFURIZATION polyionic liquids(PILs) cross-linking phosphotungstic acid oxidation reaction 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]