ASTM D4365-1995(2008) 测定催化剂微孔体积和沸石面积的标准试验方法

作者:标准资料网 时间:2024-05-12 16:13:33  浏览:8513   来源:标准资料网

【英文标准名称】:StandardTestMethodforDeterminingMicroporeVolumeandZeoliteAreaofaCatalyst
【原文标准名称】:测定催化剂微孔体积和沸石面积的标准试验方法
【标准号】:ASTMD4365-1995(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1995
【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】:catalyst;microporevolume;nitrogenadsorption;t-plot;zeolite;zeolitearea;Adsorption--petroleumproducts/applications;Area;Dead-spaceanalysis;Microporevolume;Nitrogenadsorption;t-Plot;Zeolitecatalysts
【摘要】:ThisgasadsorptionmethodcomplementstheX-rayprocedureofTestMethodD3906.ThistestmethodwillbeusefultolaboratoriesthatdonothaveX-raydiffractometers.Eachtestmethodcanbecalibratedbyuseofanappropriateseriesofmechanicalmixturestoprovidewhatmaybetermedpercentzeolite.Ifthereisdisorderinthezeolite,theadsorptionmethodwillyieldhighervaluesthantheX-raymethod.Thereversewillbetrueifsomezeolitepores(micropores)areblockedorfilled.1.1Thistestmethodcoversthedeterminationoftotalsurfaceareaandmesoporearea.Fromtheseresultsarecalculatedthezeoliteareaandmicroporevolumeofazeolitecontainingcatalyst.Themicroporevolumeisrelatedtothepercentzeoliteinthecatalyst.Thezeolitearea,anumberrelatedtothesurfaceareawithinthezeolitepores,mayalsobecalculated.Zeolitearea,however,isdifficulttointepretinphysicaltermsbecauseofthemannerinwhichnitrogenmoleculespackwithinthezeolite.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Foraspecificprecautionarystatement,seeNote3.
【中国标准分类号】:G74
【国际标准分类号】:71_040_30
【页数】:6P.;A4
【正文语种】:英语