PDMSPEI复合膜对FCC汽油的脱硫性能制膜条件影响

PDMS/PEIFCC(),,3,,(,100084):(PEI),(PDMS),PDMS/PEI(FCC).(FTIR-ATR)PDMS/PEI,.(SEM).,PDMS,,,.:;;PDMS/PEI;/:TQ028.8:A:1007-8924(2009)02-0081-06,,.,,,85%95%[1-3].34%,80%,[4].,80%,FCC(),[5].FCC4,60%,85%.,[6].[7],[8].,,.,,.11.1(PEIUltemR-1000),GE,1;N-(NMP),PEI,,;,(PDMS),,;,PDMS,,;:2007-11-07;:2007-11-30:973(2009CB623404);(20676067,20736003);863(2007AA06Z317);(20070003130):(1980-),,,[e-mail]292Vol.29No.220094MEMBRANESCIENCEANDTECHNOLOGYApr.20091(PEI)Fig.1ThechemicalstructureofPEI,PDMS,,;PDMS,10Pas,;,,.1.22.,,,,.,2Fig.2Schemeofthepervaporationapparatus,,1h,,3,,.::J=mtA(1):=xPxF(2),xP;xF;m,kg;t,h;A,m2.,,200ng/L.1.3NicoletIR560FTIR-ATR,ZnSe.PDMS/PEIJSM-6301F.1.43cm,60,48h,,m1.,96h,,,m2.(3):=m2-m1m1100%(3)22.1PDMS/PEI2.1.1(FTIR-ATR)PDMS/PEI,3.3PDMS/PEIFTIRFig.3FTIRspectraofPDMS/PEIcompositemembraneSiOH.SiOH30002890cm-1,11501000cm-1.3,SiOH8229,30002890cm-111501000cm-1,[9].4.a.PDMS;:b.25;c.50;d.70;e.90;f.1104PDMSPDMSFig.4FTIR-ATRspectraofPDMS/PEIcompositemembraneuncrosslinked(a)andcrosslinkedsamplesatdifferenttemperatures(b-f),11501000cm-1,,SiOH,.2.1.2SEMHITACHIJSM-6301FPDMS.,.,,.,,.5PDMS/PEISEMFig.5SEMmicrographofPDMS/PEIcompositemembranesurfacestructure5,,1,.6PDMS/PEI.,PDMS/PEI,,.6PDMS/PEISEMFig.6SEMmicrographofPDMS/PEIcompositemembranecross-sectionstructure2.2PDMS/PEI2.2.1,.,7.:w(PDMS)=30%,100,w()=20%,20h7PDMS/PEIFig.7SwellingbehaviorofthePDMS/PEIcompositemembraneversusimmersiontime7,100min,,,,,200min,,.,,,,.,5%,,.2:PDMS/PEIFCC()832.2.2PDMS,PDMSPDMS/PEI,8.:100,w()=20%,20h8PDMSPDMS/PEIFig.8EffectofPDMScontentonpervaporationperformanceforseparationofthiophene/heptanemixture8,PDMS,,,,.,,,.,,,;,,,,,.,,,,.,PDMS25%30%.2.2.3PDMS,PDMS/PEI,9.9,,,15%20%,:w(PDMS)=30%;100,20h9PDMS/PEIFig.9Effectofamountofcrosslinkingagentonpervaporationperformanceforseparationofthiophene/heptanemixture,,,.,PDMS,,,;,,,,,,,,,,.,,,.,15%20%.2.2.4PDMS,PDMS/PEI,10.10,,,.:,,,,;,,PDMS,,,.,,8429:w(PDMS)=30%;w()=20%;20h10PDMS/PEIFig.10Effectofcrosslinkingtemperatureonpervaporationperformanceforseparationofthiophene/heptanemixture80100.2.2.5PDMS,PDMS/PEI,11.:w(PDMS)=30%;100;w()=20%11PDMS/PEIFig.11Effectofcrosslinkingtimeonpervaporationperformanceforseparationofthiophene/heptanemixture11,,,,20h,.:,,,,,,,,.,PDMS,,,20h.,PDMS.,4,.,,.,PDMS,,.,,,,2%4%.2.2.6(PDMS30%,20%,100,20h),0.78kg/(m2h),7.6PDMS/PEI,,180h,12.12PDMS/PEIFig.12Effectoflongtimeoperationonpervaporationperformanceforseparationofthiophene/heptanemixture12,,.3PDMS/PEI,.2:PDMS/PEIFCC()85,.1)PDMS,,,,.PDMS25%30%.2),,,.15%20%.3),,.80100.4),,.20h.,,0.78kg/(m2h),7.6PDMS/PEI,,.[1]WormsbecharRF,KimG.SulfurreductioninFCCgaso2line.USPat,5376608[P].1994-12-27.[2]WormsbecherRF,KimG.SulfurreductioninFCCgaso2line.USPat,5525210[P].1996-06-11.[3]ChengWC,KimG,PetersAW,etal.Environmentalfluidcatalyticcrackingtechnology[J].CatalRev-Sci&Eng,1998,40(1-2):39-79.[4],,,.[J].,2000,31(8):1-7.[5],,,.FCC[J].(),2001,25(6):78-80.[6],,,.[J].,2006,27(1):14-17.[7],,.[J].,2003,(23)4:103-109.[8],,.[J].,2002,26(5):259-263.[9],,,.PDMS[J].,2006,26(5):72-75.Pervaporationperformanceofpolydimethylsiloxane/polyetherimidecompositemembraneforseparationofthiophene/heptanemixture(I)EffectofPDMS/PVDFmembranepreparationconditionCHENJian,CHENJinxun,LIJiding3,QIRongbin,CHENCuixian(MembraneTechnology&EngineeringResearchCenter,DepartmentofChemicalEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:CrosslinkedPDMS/PEIcompositemembraneswerepreparedforgasolinesweeteningbyusingPEIUFmembraneasthemicroporoussupportinglayerandPDMSasthecompositemembrane.ThecompositionsofthePDMS/PEIcompositemembranewerecharacterizedbyreflectionFTIR.Themorphologiesofthesurfaceandcross-sectionofPDMS/PEIcompositemembranewereinvestigatedbyscanningelectronmicroscope(SEM).ThepervaporationperformancesofthePDMS/PEIcompositemembranesfortheseparationofthio2phene/heptanemixtureswerestudied.TheeffectsofPDMSconcentration,crosslinkingtemperature,amountofcrosslinkingagentandcrosslinkingtime,ontheseparationefficiencyofn-heptane/thiophenemixtureswerein2vestigatedexperimentally,andtheoptimalpreparationconditionsofPDMS/PEImembraneswereobtained.Inaddition,theswellingdegreeandthestablenessofthecompositemembranesduringlongtimeoperationwerealsostudied.Keywords:pervaporation;gasolinesweetening;PDMS/PEIcompositemembrane;thiophene/heptanemixtures8629