简介:ThevanadiumspecieswerecontaminatedonFCCcatalystsbyusingtheMitchellmethod.AfterthehydrothermaldeactivationoftheFCCcatalysts,thecrackingreactionwasperformedonthesecatalystsamples.ThetestresultsrevealedthattheconversionoffeedstockandthegasolineyieldobtainedovertheFCCcatalystswithvanadiumtrappingcomponentswereobviouslyhigherthanthosewithoutadditionofvanadiumtrappingcomponents.TheresultsalsoshowedthatthedrygasandcokeselectivityontheFCCcatalystscontainingvanadiumtrappingcomponentswasimproved.TheX-Raydiffractionresultsprovedthatthezeolitecrystalstructurewaswellprotectedbythevanadiumtrappingcomponentsduringitshydrothermaldeactivationstep.TheresultsofSEM-EDXmappingdisclosedthatthevanadiumwasenrichedonthevanadiumtrappingcomponentswhichverifiedthepositivefunctionofvanadiumtrappingcomponents.
简介:ThestrontiummodifiedwasteFCCcatalystwaspreparedbymagneticstirringmethodandcharacterizedbyXraydiffractometry(XRD),UV-Visdiffusereflectancespectrometry(DRS),X-rayphotoelectronspectroscopy(XPS)andscanningelectronmicroscopy(SEM).Meanwhile,itsphotocatalyticdenitrogenationperformancewasevaluatedintermsofitsabilitytodegradetheN-containingsimulationoilundervisiblelight.Amixtureofstrontiumnitratesolution(withaconcentrationof0.5mol/L)andwasteFCCcatalystwascalcinedat400℃for5hpriortotakingpartinthephotocatalyticdenitrogenationreaction.ThetestresultsshowedthatthephotocatalyticdegradationrateofpyridinecontainedinsimulationoilinthepresenceofthestrontiummodifiedFCCcatalystcouldreach92.0%undervisiblelightirradiationfor2.5h.
简介:Inthecourseofreductionofreformingcatalystbynothydrogenacertainamountofchlorinecontainingcompoundsisaddedtotherecyclehydrogentofacilitatethereductionofsulfates.Theoutcomeofcommercialapplicationofthistechniquehasrevealedthattheprocedureof"regenerationbychlorination→reduction→sulfateremoval→sulfidingandoilfeed-in"aimedatsulateremovalisverysimpleandcanrecoverthereactionactivityofreformingcatalystafterhavingbeenpoisonedbysulfates.Thisprocedurecanbedisseminatedforapplicationinrefineries.
简介:<正>Drivenbytheincreasingsupplyofheavyoilswithdeterioratingquality,ahighnickel-resistantcatalystforcatalyticcrackingofinferiorcrudeoilswasdevelopedbytheResearchInstituteofPetroleumProcessing(RIPP).Catalystperformancewasevaluatedinalaboratoryfixedfluidizedbedreactor.Thetestresultsshowedthatthehighnickelresistancecatalystexhibitedgoodbottomscrackability,goodnickelresistance,andgoodadaptabilitytochangesinoperatingparameters,whichhadnoadverseeffectontheproductdistribution,indicatingtoamostpromisingprospectforapplicationofthiscatalystincatalyticcrackingofinferiorcrudeoil.
简介:Anoveladditiveincorporatedintothecatalystforremovingtraceolefinsfromaromaticswasproposed,andunderthelaboratoryconditionsthelifetimeofthecatalystwasincreasedfrom5hto8huponspecifyingtheconversionoftheolefinsequatingtomorethan55%asacriterion.Catalystproduction,whichwasnamedROC,hasbeensuccessfullyscaledupfromlaboratoryformulationstocommercialscalemanufactureandover100tonsofcatalysthadbeenproduced.ThesuperiorityincatalyticactivitywasidentifiedbytheevaluationtestsoftheROCcatalystbasedonwhateverkindoffeedstocks(withtheirbromineindexrangingfrom400mgBr/100gto1200mgBr/100g)beingusedasthefeedstock.TheX-raydiffractionpatternshadverifiedthattheadditivewashighlydispersedonthesurfaceofcatalyst;theGC-FIDanalysisresultsshowedthattheROCcatalystcouldincreasethexylenecontent;thepyridine-FTIRspectroscopicanalysessuggestedthattheadditivecouldincreasetheamountoftheweakLacids,whichwasthemaincauseleadingtoenhancementofthecatalystactivity.
简介:Theslurry-bedhydrocrackingofKaramayVGOwithwater-solubledispersedcatalystwasstudiedandthecatalystafterbeingseparatedfromthereactionproductswasanalyzedbyusingLRS,XRDandXPStoidentifythecrystalstructureofthecatalyst.Inthispaper,thecatalyticfunctionsofmolybdenum,nickelandironwerestudiedrespectivelyduringtheslurry-phasehydrocrackingwhileusingdiphenylmethaneasthemodelcompoundandVGOfromKaramaycrudeasthefeedstock.Thetestresultsshowedthat,duringtheslurry-phasehydrocrackingofheavyoil,themetalsulfidesenteredintochemicalreactionswiththefreeradicalintermediateH·formedonthecatalystsurface.Thefree-radicalintermediateH·formedonthecatalystsurfacecouldreactwiththefree-radicalsofbigmoleculesandcouldsuppresscokedeposition.
简介:减少硫的功能的部件--吊楔酸硷的对化合物--并且联系活跃沸石部件被开发为在汽油减少硫内容准备RFCC催化剂DOS。催化剂评估的结果表明了酸硷的对化合物在此开发了的吊楔能提高分子的硫由催化剂加重支持desulfurization反应继续的宏的变换,并且酸硷的对化合物能毫无疑问减少的选择沸石和吊楔的合作行动在汽油的石蜡和硫内容。因此开发的催化剂DOS的重油变换能力更高结合了一个提高的电阻到重金属污染在超过20%在汽油减少硫内容。在西诺佩克·久贾恩格·布朗奇公司的这催化剂的商业应用程序表明了与GRV-C催化剂相比,催化剂DOS获得的油泥浆收益在汽油与一种改进coke选择,增加的全部的液体收益,和一个减少的石蜡内容一起被减少。在汽油/硫在的硫的比率喂油能被20.3m%减少。