PDMSPEI复合膜对FCC汽油的脱硫性能放大实验研究

PDMS/PEIFCC(),,3,,(,100084):,.PEI,PDMS,PDMS/PEIFCC.(FTIR-ATR),.(SEM).,PDMS/PEI,.,/,8028h,200ng/L10ng/L,0.78kg/(m2h),7.6.,0.06kg/(m2h),4.8..:PDMS;;;:TQ028.8:A:1007-8924(2010)02-0069-05,,[1].,80%,FCC(),[2].FCC4,60%,85%[3].,2[4,5].,[6-8].[9-19],(22.1cm2),,,22.1cm21680cm2,75,1.5L11L,7.3.880L/h,80,21933kPa(22mmHg),..11.1(PEIUltemÓ-1000),GE,1.N-(NMP),,.,,:2009-01-13;:2009-03-02:973(2009CB623404);(20676067,20736003);863(2007AA06Z317);(20070003130);((SKL-ChE-08A01);(023201069):(1978-),,,[e-mail]302Vol.30No.220104MEMBRANESCIENCEANDTECHNOLOGYApr.20101(PEI)Fig.1ThechemicalstructureofPEI.(PDMS),10Pas,.,,.1.22.:.,,,,.,(0.1MPa).,,.,180mm260mm,1.;2.;3.;4.;5.;6.;7.;8.;9.;10.;11.;12.;13.;14.2Fig.2Schemeofthepervaporationapparatus,,,168mm250mm4=1680cm2.::J=mtA(1):=xPxF(2),xP;xF;m,kg;t,h;A,m2.1.3NicoletIR560FTIR-ATR,ZnSe.PDMS/PEIJSM-7401F.22.1PDMS/PEI2.1.1(FTIR-ATR)PDMS/PEI,3.3,PDMSSiOH30002890cm-11150-1000cm-1.SiOH,30002890cm-111501000cm-1,.3PDMS/PEIFTIRFig.3FTIRspectraofPDMS/PEIcompositemembrane7030PDMS/PEI4,aPDMS;bf25,50,70,90,110PDMS/PEI.,,11501000cm-1,,SiOH,,.a.PDMS;:b.25;c.50;d.70;e.90;f.1104PDMSPDMSFig.4FTIR-ATRspectraofPDMS/PEIcompositemembraneuncrosslinked(a)andcrosslinkedsamplesatdifferenttemperatures(bf)2.1.2SEMPDMS/PEI,5(a)5(b).5PDMS/PEI(a)(b)SEMFig.5SEMmicrographofPDMS/PEIcompositemembranecross-section(a)andsurfacestructure(b)5(a),PDMS/PEI,,,.6m.5(b),PDMS/PEI,1,,.2.2PDMS/PEI2.2.1//,80,.6,7.,3h,,.,,,,10ng/L.,.67,8028h,200ng/Lw(PDMS)=30%,w()=20%,100,20h6Fig.6Relationshipofoperationtimewithpervaporationperformanceofthemembranew(PDMS)=30%,w()=20%,100,20h7Fig.7Relationshipofoperationtimewithsulfurcontentinthefeed2:PDMS/PEIFCC()7110ng/L,PDMS/PEI0.78kg/(m2h),7.6.2.2.2/,.,,,100ng/L,400ng/L.80,8,9.w(PDMS)=30%,w()=20%,100,20h8Fig.8Relationshipofoperationtimewithpervaporatioperformanceofthemembranew(PDMS)=30%,w()=20%,100,20h9Fig.9Relationshipofoperationtimewithpervaporationperformanceofthemembrane,,,,,,/.,,,,,,.,,,;,,.,,,.89,8050h,390ng/L200ng/L,PDMS/PEI0.06kg/(m2h),4.8.//:,/0.78kg/(m2h)0.06kg/(m2h),/7.64.8,.3PDMS/PEI,:80,/,,0.7kg/(m2h);;.8028h,200ng/L10ng/L,0.78kg/(m2h),7.6.,,;,,0.06kg/(m2h),418..[1],,,.[J].,2000,31(8):1-7.[2],,,.FCC[J].(),2001,25(6):78-80.[3],,,.[J].,2006,27(1):14-17.7230[4],,.[J].,2005,25(10):21-26.[5],,,.FCCHEC[J].,2008,24(2):232-236.[6],,.[J].,2003,23(4):103-109.[7],,,./[J].,2007,27(4):87-90.[8],,,.[J].,2008,18(1):31-33.[9]QiRongbin,ZhaoChangwei,LiJiding,etal.Removalofthiophenesfromn-octane/thiophenemixturesbyper2vaporation[J].JMembrSci,2006,269:94-100.[10]QiRongbin,WangYujun,LiJiding,etal.Pervaporationseparationofalkane/thiophenemixtureswithPDMSmem2brane[J].JMembrSci,2006,280:545-552.[11]QiRongbin,WangYujun,LiJiding,etal.Sulfurremovalfromgasolinebypervaporation:theeffectofhydrocarbonspecies[J].SepPurifTechnol,2006,51:258-264.[12]QiRongbin,WangYujun,ChenJian,etal.Removingthio2phenesfromn-octaneusingPDMS-AgYzeolitemixedmatrixmembranes[J].JMembrSci,2007,295:114-120.[13],,,.[J].,2006,3:496-499.[14]WangLH,ZhaoZP,LiJD,etal.Synthesisandchar2acterizationoffluorinatedpolyimidesforpervaporationofn-heptane/thiophenemixtures[J].EurPolymJ,2006:1266-1272.[15],,,.PDMS[J].,2006,26(5):72-75.[16],,,./[J].,2007,27(4):87-90.[17],,,..:CN101053789[P].2007-10-17.[18]ChenJian,LiJiding,QiRongbin,etal.Pervaporationperformanceofcrosslinkedpolydimethylsiloxanemem2branesfordeepdesulfurizationofFCCgasoline:(I)Effectofdifferentsulfurspecies[J].JMembrSci,2008,322:113-121.[19]ChenJian,LiJiding,QiRongbin,etal.Pervaporationseparationofthiophene/heptanemixtureswithpoly2dimethylsiloxane(PDMS)membranefordesulfurization[J].ApplBiochemandBiotechnol,DOI10.1007/s12010-008-8368-z.Pervaporationperformanceofpolydimethylsiloxane/polyetherimidecompositemembraneforgasolinedesulphurization()Scale-upexperimentstudyCHENJinxun,CHENJian,LIJiding3,LINYangzheng,CHENCuixian(CenterforMembraneTechnology&Engineering,DepartmentofChemicalEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:Pervaporationisoneofthemosteffectivemembraneseparationtechnologies,especiallywiththesig2nificanceandpossibilityfordeepdesulphurizationoffluidcatalyticcracking(FCC)gasoline.Inthispaper,crosslinkedpolydimethylsiloxane/polyetherimide(PDMS/PEI)compositemembraneswereprepared,inwhichasymmetricPEImembranepreparedwithphaseinversionmethodactedasthemicroporoussupportinglayerintheflat-platecompositemembrane.ThedifferentfunctioncompositionsofthePEG/PEIcompositemembraneswerecharacterizedbyreflectionFTIR.ThesurfaceandsectionofPDMS/PEIcompositemembraneswereinves2tigatedbyscanningelectronmicroscope(SEM).Basedonourpreviousstudies,thecompositemembranespre2paredinthisworkwereemployedinsacle-upprocesstoinvestigatethepervaporationperformanceofthemem2branesindifferentfeedconditions.Duringtheoperationof28hat80forn-heptane/thiophenemixtures,thefeedtotalsulfurconcentrationdecreasedfrom200ng/Lto10ng/Lwhileaveragetotalfluxandsulfuren2richmentfactorwas0.78kg/(m2h)and7.6,respectively.Experimentresultsalsodemonstratedthattheav2eragetotalfluxandsulfurenrichmentfactorforgasolin