鑭硅磷酸鋁分子篩的合成及表征.pdf

1、二○○七年五月二○○七年五月碩士學(xué)位論文碩士學(xué)位論文分類號:學(xué)校代碼:10128分類號:學(xué)校代碼:10128UDC:學(xué)號:20041245學(xué)號:20041245題目：鑭硅磷酸鋁分子篩的合成及表征目：鑭硅磷酸鋁分子篩的合成及表征英文題目：英文題目：SynthesisandCharacterizationofLanthanumSilicoaluminophosphateMolecularSieve研究生：劉云研究生：劉云學(xué)科專業(yè)：工業(yè)催化學(xué)

2、科專業(yè)：工業(yè)催化指導(dǎo)教師：秦海莉副教授指導(dǎo)教師：秦海莉副教授AbstractPouscrystallinesilicoaluminophosphatemolecularsievespossessthreedimensionalframewkstructureoftetrahedralunitsAlO4PO4SiO4ionexchangepropertiesacidity.InthisdissertationLanthanumisused

3、tosubstitutepartofPhosphusAluminiumintheframewkenterintothetetrahedronstructureunitofoxygennegativeionfobtainingakindofheteroatommolecularsievewithacidity.LaSAPOmolecularsieveexpstherealmsofsynthesisapplicationofmolecula

4、rsievematerialswhichcanbeusedassbentofseparatingpurifyingmolecularspeciescatalystcatalyst’scarrierionsexchangeretc.Themainstudiesofthisdissertationaresummarizedasfollows:1.TheeffectofusingtemplateamountsstartingpHvalueof

5、reactionsystemcrystalloidtemperaturetimestirringspeedtheSiO2Al2O3ratioaddingseedonsynthesisofLaSAPOmolecularsieveweresystematicallyinvestigated.Theexperimentresultsshowthatanewtypeofpurelanthanumsilicoaluminophosphatemol

6、ecularsieve(LaSAPO)withhighercrytaldegreewassynthesizedbyhydrothermalsynthesisinTMAOHAl2O3P2O5SiO2La2(CO3)3H2OCTABsystem.theoptimalconditionsareasfollows:n(TMAOH)∶n(Al2O3)∶n(P2O5)∶n(SiO2)∶n(CTAB)∶n(La2O3)∶n(H2O)＝3.83∶1.0

7、∶1.0∶0.6∶0.35∶0.4∶335(molratio)crystallizationisat170℃f36hoursstirringspeedis780rpmthepHis6.0~7.0.IntheprocessofmolecularsievesynthesisthefmationofLaSAPOmolecularsievewaseffectivelypromotedcrystaldegreewasincreasedbyaddi

8、ngseedbefebehindstilling.2.TheLaSAPOsamplewasacterizedbyXRDFTIRXRFDTATGTEMsoontheresultsshowsthatpureLaSAPOmolecularsievewithbetterheatstabilitywasobtained.3.TheLaSAPOsamplewasusedasesterificationofaceticacidbutanoltoinv