化学驱油技术相关进展.ppt

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1、SurfacetensiondeterminationwiththemaximumdifferentialpressuremethodWangZengbao2012.11EXPERIMENT11.Experimentalpurposes(1)Mastertheprinciplesandmethodsofmaximumdifferentialpressuremethodforthedeterminationofsurfacetension.(2)Measurethesurfacetensionofn-butylalcohol

2、solution,andunderstandtheconceptofsurfacetensionandinfluencingfactors.(3)LearnGibbsequationanditsapplications.2.ExperimentalprinciplesPolyacrylamidecanbesynthesizedfromacrylamidetriggeredbyammoniumpersulfate:Polyacrylamidecanhydrolyzeinalkalinesolution,whichgenera

3、tespartiallyhydrolyzedpolyacrylamide:（1）—Theadditionalpressurewhichisformedwhenthewaterdropsdowninthewidemouthbottle—Thecurvatureradiusofthebubble—Thesurfacetension（N/m）2.ExperimentalprinciplesTherefore,atthesametemperature,oncetheΔP1,ΔP2aremeasured,andtheIFTofthe

4、liquid(water)whoseIFTisknownisfoundoutaccordingtothetemperaturetable,thenwecancalculatetheIFToftheunknownliquidfromtheformula。（1）2.Experimentalprinciples3.ApparatusandreagentsApparatusOnesetofdevicetomeasuretheIFTwiththemethodofmaximumdifferentialpressure,Bottle,r

5、ubberpipettebulb.ReagentsN-butylalcohol(analyticallypure),distilledwater.4.Experimentalprocedures(1)Washtheexternalcaseandthecapillarytubeoftheinstrumentusedtomeasuresurfacetensionwithlotion.Firstaddalittlelotionintotheexternalcase,rotationitinclinedsothatthelotio

6、ncancontactwiththeexternalcase(becarefulnottoletthelotionoutflowfromthesideofthetube).Theninsertthecapillarytubeandmaintaintheinclinedexternalcasestill.Rotatethecapillarytubetomakethelotioncontactwiththecapillarytube.Adsorbsomelotionwiththerubberpipettebulbtotheca

7、pillarytubetowashtheinsideofthecapillarytube.Pullthespentlotiontoitsoriginalbottleandwashtheexternalcaseandthecapillarytubewithrunningwaterfully.Finally,washtheexternalcaseandthecapillarytubewithdistilledwaterthreetimesrespectively.Thenwecangoonwiththefollowingexp

8、eriences.4.Experimentalprocedures(2)Putsomedistilledwaterintotheexternalcase(regardasliquidofknownIFT.SeeAppendixIItogetitssurfacetension).Insertthecapi