以二氧化硅負(fù)載的磷化鉬催化劑加氫脫硫和加氫脫氮反應(yīng)研究.pdf

1、大連理工大學(xué)碩士學(xué)位論文以二氧化硅負(fù)載的磷化鉬催化劑加氫脫硫和加氫脫氮反應(yīng)研究姓名：鄢景森申請學(xué)位級別：碩士專業(yè)：工業(yè)催化指導(dǎo)教師：王安杰20050601墜三魚些堡塑望望塑堡些塑堡些型!!篁!!墮!!i!塾壁亟墾壅墮窒ⅡYDRoDESULFURIZATIoNANDHYDRoDENITRoGENATIoNOFSILICASUPPoIU翟DMomDENUMPHoSPmDEAbstractInterestinthedevelopmentofn

2、ovelcatalystsforhydrodesulfurizationhasbeenspurredbecauseofthemorestringentenvironmentallegislationandcontinuousdeclineinquMityofpetroleumfeedstocksOtherthantraditionallyusedsulfidecatalyst，MoniWideandcarbidecatalystshav

3、ebeenextensivelystudied，buttheirhydrodesulfurization(HDS)andhydrodenitrogenation(HDN)activitiesareinitiallyhi曲butdeclinewithtimeinthepresenceofsulfurcontainingcompoundsMorerecently，transitionalmetalphosphideswerereported

4、tohavesuperioractivitiestotraditionalMosulfidecatalystsinhydrotreatingprocessesAmongthem，molybdenumphosphides，bulkandsupported，attractedmoreattentionasmeyshowhigherHDSandHDNactivitiesandinsomecasesevenexhibitincreasedact

5、ivitieswithreactiontimeSilicasupportedmolebdenumphosphidesMoWSi02州t11weightloadingfrom8to35wt％arepreparedbYinsituTPRreductionofsilicasupportedmolybdenumphosphateprecursorsina缸cdbedmactorTheprecursorswereobtainedbyincipie

6、ntwetnessimpregnationofthesuppoawj血aqueoussolutionof(NI)6M070244H20and(NH4)2HP04TheprecursorsarecharaterizedbyTPRtoinvestigatethereactionsinvolvedinthepreparationofMoPcatalysts，andthestructureofthepassivatedMoPcatalystsw

7、erecharacterizedbymeansofXRDTheHDSpeIfommceofthepreparedmolebdenumphospidecatalystisevaluatedinthesamefixedbedreactorusing08wt％dibenzothiopheneindecalinasthefeedattemperature360。Cpressure50MPaandWHSV21h1Highestperformanc

8、eisobservedatatotalloadingof25wt％IncomparisonwiththeHDSactivityofpassivated25wt％MoP／Si02catalystitisfoundthatthesupportedMoPcatalystspreparedbyin—situreductionmethodissuperiortothatbytheconvenfionMreduclionpassivationred

9、uctionmethodinHDSofDBTAnextensivescrutinyofinsitureductionconditions，includingheatingrate，flowrateofreducingagentH2，totalpressureandreductiontemperaturewerestudiedItisshownthattheinsitureductionconditionshavegreatinfluen