Designation:D4365−13StandardTestMethodforDeterminingMicroporeVolumeandZeoliteAreaofaCatalyst1ThisstandardisissuedunderthefixeddesignationD4365;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftotalsurfaceareaandmesoporearea.Fromtheseresultsarecalcu-latedthezeoliteareaandmicroporevolumeofazeolitecontainingcatalyst.Themicroporevolumeisrelatedtothepercentzeoliteinthecatalyst.Thezeolitearea,anumberrelatedtothesurfaceareawithinthezeolitepores,mayalsobecalculated.Zeolitearea,however,isdifficulttointepretinphysicaltermsbecauseofthemannerinwhichnitrogenmoleculespackwithinthezeolite.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Foraspecificprecautionarystatement,seeNote3.2.ReferencedDocuments2.1ASTMStandards:2D3663TestMethodforSurfaceAreaofCatalystsandCatalystCarriersD3906TestMethodforDeterminationofRelativeX-rayDiffractionIntensitiesofFaujasite-TypeZeolite-ContainingMaterialsE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE456TerminologyRelatingtoQualityandStatisticsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1mesopore(matrix)areaofacatalyst—theareadeter-minedfromtheslopeofthet-plot.3.1.2microporevolumeofthecatalyst—theporevolumeinporeshavingradiilessthan1nm,usuallyassociatedwiththezeoliteportionofthecatalyst,anddeterminedfromtheinterceptofthet-plot.3.1.3surfaceareaofacatalyst—thetotalsurfaceofthecatalystpores....
