過渡金屬納米催化劑制備及其催化甲烷裂解積碳性能考察.pdf

1、天津大學(xué)碩士學(xué)位論文過渡金屬納米催化劑制備及其催化甲烷裂解積碳性能考察姓名：楊曉亮申請學(xué)位級別：碩士專業(yè)：物理化學(xué)指導(dǎo)教師：崔屾20070601ABSTRACTThetransitionmetalnanocatalysts(嗍playanimportantroleinthepreparationoftheadvancedcarbonllanomaterials，suchascarbonnanotubes(CNTs)bythecataly

2、ticdecompositionofhydrocarbonsThestudiesonTMNandtheirapplicationinthepreparationofcarbonnano—materialshavebeenpayedmuchaaentioninrecentyearsInthisdissertation，theTMNWaspreparedbythemodifiedsol—gelandsedimentationmethodsT

3、heeffectsoftheamountofammoniaaddedgrinding，theamountoforganicphaseaddedtheamountofsupportaddedandthetemperatureofcalcinationontheyieldofTMN，percentageandmorphologyofcarbondepositswereinvestigated。Theexperimentalresultspr

4、esentedthatwhentheamountoforganicphaseaddedwas0mladdingallappropriateamount(120m1)ofammoniacouldimprovetheyieldofTMN，andexcessiveamountofammoniaadded(200m1)couldreducetheyieldsharply；thepercentagesofcarbondepositsincreas

5、edwiththeincreaseofamountofammoniaaddedandwhentheamountofammoniawasmorethan160ml，thistTendbecameweak；thequantityofCNTsalsoincreasedThepercentageofcarbondepositsandthequantityofCNTswereimprovedbygrindingthesamplesbeforean

6、daftertheheattreatedWhentheamountofammoniaaddedWas165ml，theyieldof刪Wasfallinggraduallywiththeincreaseoforganicphaseadded；theparticlesofTMNsmallerthan100rimbecamefewer；thepercentagesofcarbondeposits，whichwerestillmorethan

7、thepercentagewhentheamountofammoniaaddedwas0ml，fellalso；thequantityofCNTsincarbondepositswerefewerWhentheamountofammoniaaddedis165mlandtheorganicphaseaddedwasnot0m1calcinationofcatalystsat1200℃for2hledtotheparticlessmall

8、erthan100nmmoreandimprovedthepercentageofcarbondepositsandthequantityofCNTsWhentheamountofammoniaaddedWas165mlandtheorganicphaseaddedis108ml，theyieldofTMNincreasedgraduallywiththeincreaseofthesupportadded；thepercentageso

9、fcarbondepositsandthequantityofCNTsfell，whenthesupportaddedWas1559，thereWasonlyseveralCNTsWhenthesupportWasaddedcalcinationsofcatalystsat1200“Cfor2hledtotheparticlessmallerthanlOOnmlessandcarbondepositsmainlybeingbigpart

10、iclesTheeffectofconcentrationoftransitionalmetalsolutioninwateronthemorphologyofcarbondepositscatalyzedbytheTMNhadbeeninvestigatedTheexperimentalresultspresentedthattheTMNonquartzslicehassomeactivityofcarbondepositsVilli