【英文标准名称】:StandardTestMethodforHydrogenChemisorptiononSupportedPlatinumCatalystsbyVolumetricVacuumMethod
【原文标准名称】:容量真空法测定铂催化剂氢化学吸附性的标准试验方法
【标准号】:ASTMD3908-2003(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D32.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:chemisorption;hydrogenchemisorption;platinumcatalysts;volumetricmethod;Hydrogencontent--petroleumproducts;Hydrogenuptakedata;Platinumcatalysts;Supportedplatinumcatalysts;Vacuumtesting--petroleumproducts;Volumetricmeasurement--petrole
【摘要】:Thistestmethodsetsforthaprocedurebywhichduplicatecatalystsamplescanbecomparedeitheronaninterlaboratoryorintralaboratorybasis.Itisanticipatedthatcatalystproducersanduserswillfindthistestmethodofvalue.Discriminationofthesamplesforwhichthisprocedureisrecommendedmustbeexercisedwhenconsideringcarrier(support)materialsthatsorbappreciablequantitiesofhydrogenorcouldcauseanalterationofthestateofthecatalystduringpretreatment,orboth,(thatis,sinteringormetalocclusion).Thesematerialsmustbeidentifiedbytheuserandexperimentedwithtodeterminethemostsignificantconditionsofmeasurement.Thistestmethodprovidesameasureofthetotalhydrogenuptake(volumeofhydrogenatSTP,cm3/gofcatalyst)withoutspecifyingthenatureofthehydrogen-platinuminteraction.Personsinterestedinusinghydrogenuptakedatatocalculatepercentplatinumdispersioninaspecificcatalystshouldbeawareofcarrier(support)interactions,spillovereffects,andotherphenomenarelatedtothehydrogenuptakecapabilitiesofthecatalystinquestion.1.1Thistestmethodcoversthedeterminationofthechemisorptionofhydrogenat298K(25x00B0;C)onsupportedplatinumcatalyststhathavebeenreducedinflowinghydrogenat723K(450x00B0;C).Itincorporatesastaticvolumetricvacuumtechniqueatconstantvolume.1.2Thetestmethodisintendedforuseonunusedsupportedplatinumonaluminacatalystsofloadingsgreaterthan0.3weight%.Dataonothersupportsandlowerplatinumloadingswerenottested.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G74
【国际标准分类号】:
【页数】:5P.;A4
【正文语种】:英语