ASTM D4438-1985(2007) 电子计数法对催化材料的粒度分布的试验方法

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【英文标准名称】:StandardTestMethodforParticleSizeDistributionofCatalyticMaterialbyElectronicCounting
【原文标准名称】:电子计数法对催化材料的粒度分布的试验方法
【标准号】:ASTMD4438-1985(2007)
【标准状态】:现行
【国别】:
【发布日期】:1985
【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】:D32.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:分配;试验;润滑剂;石油产品;催化剂;粒度
【英文主题词】:catalysts;electroconductivesensing;particlesize
【摘要】:Thistestmethodcanbeusedtodetermineparticlesizedistributionsformaterialspecifications,manufacturingcontrol,andresearchanddevelopmentworkintheparticlesizerangeusuallyencounteredinfluidizablecrackingcatalysts.1.1Thistestmethodcoversthedeterminationofparticlesizedistributionofcatalystandcatalystcarrierparticlesusinganelectroconductivesensingmethodandisoneofseveralvaluablemethodsforthemeasurementofparticlesize.1.2Therangeofparticlesizesinvestigatedwas20to150m(seeIEEE/ASTMSI10)equivalentsphericaldiameter.Thetechniqueiscapableofmeasuringparticlesaboveandbelowthisrange.Theinstrumentusedforthismethodisanelectriccurrentpathofsmalldimensionsthatismodulatedbyindividualparticlepassagethroughanaperture,andproducesindividualpulsesofamplitudeproportionaltotheparticlevolume.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G74
【国际标准分类号】:19_120
【页数】:3P.;A4
【正文语种】: