资源描述：
《On surface of micropores and fractal dimension of activated carbon determined on the basis of adsorption and SAXS investigations》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、PERGAMONCarbon38(2000)1153±1162OnsurfaceofmicroporesandfractaldimensionofactivatedcarbondeterminedonthebasisofadsorptionandSAXSinvestigationsR.Diduszko,A.Swiatkowski,B.J.Trznadelabc,*aInstituteofVacuumTechnology,ul.Duga44/50,00-241Warsaw,PolandbMilitaryT
2、echnicalAcademy,ul.S.Kaliskiego2,00-908Warsaw,PolandcMilitaryInstituteofChemistryandRadiometry,al.gen.A.ChruscielaÂ105,00-910Warsaw,PolandReceived13September1999;accepted6October1999AbstractGranulatedcommercialactivatedcarbonobtainedfromhardcoalwassepara
3、tedforfractions,byelutriation,inanairstreamofconstant¯ow-rate.Threesamplesofdifferentfalldowndistancesfromtheoutlettubeweredemineralized.Benzeneadsorptionisothermsweredeterminedat293KandSAXSmeasurementswereperformedforeachone.TheDubinin±IzotovaandDubinin
4、±Stoeckliequationswereusedforevaluationofmicroporestructuralparametersofexaminedcarbonsamples.Onthebasisoftheseequationsdifferentmethodsofcalculationofgeometricsurfaceareawerediscussed.Obtainedresultswerecomparedwithvaluesevaluatedbyusingthemethodpropose
5、dhere.ThismethodcomprisesresultsofSAXSandadsorptionmeasurements.Changesofgeometricsurfaceareawerecon®rmedbyanalysisofsurfaceroughnessmeasuredbyfractaldimension.Thevaluesoffractaldimensionwereobtainedbymethodofcalculationonthebasisofadsorptiondataproposed
6、previouslybyEhrburger±Dolleandwerecomparedwithmodi®cationproposedhere.Thismodi®cationisbasedonwellknowncorrelationgivenbyMcEnaney.ObtainedvaluesoffractaldimensionwerecomparedwithvaluesdeterminedonthebasisofSAXSdata.Ó2000ElsevierScienceLtd.Allrightsreserv
7、ed.Keywords:A.Activatedcarbon;C.Adsorption,X-rayscattering;D.Microporosity1.Introductionsatisfactorilyaccuratetechniqueofevaluationstructuralparametersofactivatedcarbonsisnotavailable.TheneedMicroporousactivatedcarbonsareusedinavarietyofforsuchtechniqueh
8、asbecomeincreasinglyurgentwhilegasseparation,puri®cationandcatalyticprocesses.Effec-onecanobservearapiddevelopmentofnewmicroporoustiveuseofthesematerialsrequiresknowledgeoftheporematerialsfordifferentapplications.geometry,
