欢迎来到天天文库
浏览记录
ID:39153290
大小:1.41 MB
页数:28页
时间:2019-06-25
《ACTIVATION OF COBALT-MOLYBDENUM HYDRODESULFURIZATION》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、D.L.Trimmetal.(Editors),CatalystsinPetroleumRefining198923301990ElsevierSciencePublishersB.V.,Amsterdam-PrintedinTheNetherlandsACTIVATIONOFCOBALT-MOLYBDENUMHYDRODESULFURIZA-TIONCATALYSTS:INFLUENCEOFTHESULFIDATIONPROCE-DUREONTHEPHYSICO-CHEMICALPROPERTIESANDCATALYTICACTIVITYR.PRADAS
2、ILVY*,P.GRANGEandB.DEMONUnit6deCatalyseetChimiedesMat6riauxDivids,Universit6CatholiquedeLouvain,PlaceCroixduSud1,1348Louvain-la-Neuve(Belgium).*INTEVEPS.A.,Secci6ndeCatilisisAplicada,ApartadoPostal76343,Caracas1070-A(Venezuela).ABSTRACTAcommercialCoMoly-Al203catalystwasactivatedin
3、thetemperaturerange300-800°Caccordingto3differentprocedures:(i)reductionbyH2(R)followedbyreduction-sulfidationbyH2S+H2(RS),(ii)directreductionsulfidationRSand(iii)sulfidationbyH2S(S)followedbyRS.Thesampleswerecharacterizedforcatalyticactivity(hydrogenolysisofthiopheneandhydrogenat
4、ionofcyclohexeneat3MPa)andbyXPS,IRofadsorbedNO,NOchemisorptionandsulfurcontentanalysis.Thecouplingofthereductionandsulfidationprocessesisveryfavorabletosulfidationandactivity.Ifreductionistooeasy,thecouplingeffectweakens,difficultlysulfidableMoo2isformed,andcatalystswithloweractiv
5、itiesareusuallyobtained.ThehighactivityofcatalystsobtainedbyRSataround400°CcanbeexplainedbythepresenceofaCoMoSphase.ThehighactivityofR+RSorRScatalystsobtainedrespectivelyat400°Cand>400°CseemstocorrespondtoaremotecontroleffectinvolvingsegregatedcobaltsulfidesandMoS2(orCoMoS).Thesur
6、prisingconstancyofactivityofRScatalystsactivatedat4007、estingthatamostimportantcharacteristicofanactivecatalystisaproperbalanceofthenumberofexposedCoandMoions.1.INTRODUCTIONHydrodesulfurization(HDS)catalystscontainingcobalt-molybdenum(CoMo)andnickel-molybdenum(NiMo)areproducedintheoxidicform.Theactivationiscarriedoutunderpressurebyred8、ucingandsulfidingagents(0.2-5MPa)
7、estingthatamostimportantcharacteristicofanactivecatalystisaproperbalanceofthenumberofexposedCoandMoions.1.INTRODUCTIONHydrodesulfurization(HDS)catalystscontainingcobalt-molybdenum(CoMo)andnickel-molybdenum(NiMo)areproducedintheoxidicform.Theactivationiscarriedoutunderpressurebyred
8、ucingandsulfidingagents(0.2-5MPa)
此文档下载收益归作者所有