A series of novel binary deep eutectic solvents(DESs)composed of choline chloride(ChCl)and formic acid(HCOOH)with different molar ratios have been successfully synthesized and applied in extractive desul-furization(EDS).Keggin-type polyoxometallate ionic liquid[TTTPh]3PW12O40 was prepared and used as catalyst to enhance the EDS capacity by means of photocatalytic oxidative process.Both of the DESs and[TTPh]3PW12O40 ionic liquid catalyst were characterized in detail by Fourier transform infrared spec-troscopy spectra(FT-IR),elemental analysis,and X-ray photoelectron spectroscopy(XPS).It was found that the molar ratios ofChCl:HCOOH had a major impact on desulfurization performance,and the optimal desulfurization capacity 96.5％was obtained by ChCl/5HCOOH.Besides dibenzothiophene(DBT),the desulfurization efficiencies of 4-methylbenzothiophene(4-MDBT)and 4,6-dimethyldibenzothiophene(4,6-DMDBT),two kinds of DBT derivatives,were also investigated under the same experimental condi-tions.Moreover,the free radical scavenging experiments manifested that superoxide radical(·O2-)and hole(h+)played important roles in the desulfurization system.After further analysis of the oxidation products by gas chromatography-mass spectrometry(GC-MS),the possible reaction mechanism was proposed.Thus,photocatalytic oxidative has been proved to be one of the efficient approaches for enhancing the extractive desulfurization performance in DES.

Linlan Wu;Zhengxin Jiao;Suhang Xun;Minqiang He;Lei Fan;Chao Wang;Wenshu Yang;Wenshuai Zhu;Huaming Li

School of Chemistry and Chemical Engineering,Institute for Energy Research,Jiangsu University,Zhenjiang 212013,China;School of Environment and Safety Engineering,Institute of Environmental Health and Ecological Security,Jiangsu University,Zhenjiang 212013,China;School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225002,China

中国化学工程学报（英文版）

[1]Linlan Wu;Zhengxin Jiao;Suhang Xun;Minqiang He;Lei Fan;Chao Wang;Wenshu Yang;Wenshuai Zhu;Huaming Li-.Photocatalytic oxidative of Keggin-type polyoxometalate ionic liquid for enhanced extractive desulfurization in binary deep eutectic solvents)[J].中国化学工程学报（英文版）,2022(04):205-211

desul,furization,polyoxometallate,TTTPh,TTPh,ofChCl,5HCOOH,methylbenzothiophene,MDBT,dimethyldibenzothiophene

Photocatalytic,oxidative,Keggin,type,polyoxometalate,ionic,liquid,enhanced,extractive,desulfurization,binary,deep,eutectic,solvents,series,novel,DESs,composed,choline,chloride,formic,acid,different,molar,ratios,have,been,successfully,synthesized,applied,EDS,3PW12O40,was,prepared,used,catalyst,capacity,by,means,photocatalytic,process,Both,were,characterized,detail,Fourier,transform,infrared,spectra,FT,elemental,analysis,ray,photoelectron,spectroscopy,XPS,It,found,that,had,major,impact,performance,optimal,obtained,Besides,efficiencies,DMDBT,two,kinds,derivatives,also,investigated,under,same,experimental,condi,tions,Moreover,free,radical,scavenging,experiments,manifested,superoxide,O2,hole,h+,played,important,roles,system,After,further,oxidation,products,gas,chromatography,mass,spectrometry,possible,reaction,mechanism,proposed,Thus,has,proved,one,efficient,approaches,enhancing

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