介孔固体超强酸so42-xc的制备 结构及其催化合成水杨酸正丁酯的研究.docx

介孔固体超强酸so42-xc的制备结构及其催化合成水杨酸正丁酯的探讨汕头高校工学硕士学位论文万方数据AbstractMesoporousSo1.idSuperacidsSO42-XC(X-A1、Zr、SiZr,Jmontmori1.Ionite、rectorite)hadbeenpreparedandusedasnewcata1.ystsinthesynthesisofn-buty1.sa1.icy1.ate.Varioustechniques,suchasHammettindicator,NH3-TPD,Py-IK,XRD,BET,TG,DTAandIR,hadbeenusedtocharacterizesamp1.es.Onthebasisofcharacterization,thereactionconditionforpreparationn-buty1.sa1.icy1.ate,propertiesandstructureofpi1.1.aredc1.ayshadbeeninvestigated.Theresu1.tsshowedthat:Theproperpreparationconditionsofcata1.ystsSO42-/XCfo1.1.owed:SiZrwas2-pi1.1.aringagent,acce1.erantwas(NH4)2SO4,m(SO4)m(c1.ay)was30%,thetemperatureofca1.cinationwas500,andn(SiZr)/m(c1.ay)was3.5mmo1.g.Cata1.ystsSO42/SiZrCexhibitedhighcata1.yticactivityandgoodcata1.yticstabi1.ityinthesynthesisofn-buty1.sa1.icy1.ate.Forexamp1.e,theconversionofacidamountedto88.22%overcata1.ystSO42/SiZrM,and86.85%overcata1.ystSO42/SiZrR,thecata1.yticse1.ectivityamountedto99.9%and99.5%,theconversionofacidon1.ydecreasedby5.33%and1.98%afterfivetimescontinuousreaction.Hanmettindicator,NH3-TPDandPy-IRmeasurementsindicatedthatcata1.ystsSO42-/ZrC(500'C)andSO42-/SiZrC(500aC)weresuperacids.Thetypeofsuperacidbe1.ongedto1.ewisacidcenter,anda1.sowastheactivitycenterofesterfication.XRDandBETmeasurementsindicatedthatthepi1Iaringagentsfixedintheinter1.ayerregionofc1.aysbychemica1.bond,anda1.soincreasedbasa1.spacingandsurfacearea.Whentheca1.cinationtemperatureincreased,thebasa1.spacingandsurfaceareadec1.ined.Aftercross-inked,thescopeofPI1.Caperturewasnarrow,especia1.y,theapertureofcata1.ystSO42-/SiZrR(100oC)wasaround2.3nm,anditwaspartofMesoporousMateria1.s.ThedosageofSO42-wasincreased,thebasa1.spacingandsurfaceareadec1.ined.Thebasa1.spacingofSO42-/XRwashigherthanthatofSO42-XM,whi1.esurfaceareatookonacon.