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【英文标准名称】:StandardTestMethodforDeterminationofNitrogenAdsorptionandDesorptionIsothermsofCatalystsandCatalystCarriersbyStaticVolumetricMeasurements
【原文标准名称】:静态体积测量法测定催化剂和催化剂载体氮吸附和解附等温线的标准试验方法
【标准号】:ASTMD4222-2003(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】:adsorption;catalysts;desorption;isotherms;nitrogengas;volumetric;Catalysts/catalystcarriers;Dead-spaceanalysis;Desorptionisotherms;Isothermtechniques;Nitrogenadsorption;Performance--petroleumproducts/applications;Poredistribution;Poro
【摘要】:Thetestmethodhastwomainfunctions:first,itprovidesdatausefulforestablishingtheporesizedistributionofcatalystmaterials,whichinturnmayinfluencetheirperformance;andsecond,itservesasalaboratorytestwhichmaybeusedtostudyporositychangesthatmayoccurduringthemanufactureandevaluationofcatalysts.1.1Thistestmethodcoversthedeterminationofnitrogenadsorptionanddesorptionisothermsofcatalystsandcatalystcarriersattheboilingpointofliquidnitrogen.Astaticvolumetricmeasuringsystemisusedtoobtainsufficientequilibriumadsorptionpointsoneachbranchoftheisothermtoadequatelydefinetheadsorptionanddesorptionbranchesoftheisotherm.Thirtypointsevenlyspreadovertheisothermisconsideredtobetheminimumnumberofpointsthatwilladequatelydefinetheisotherm.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【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