XXXX第4回日中韩石油技术会议conference06-12_SKOil

TheModified-treatmentStudyofWAFIfortheColdPropertyControlinWinterSeason2011.2.FuelsLab1.Introduction2.WAFIstudyinSK3.SummaryContentsFuelsLaboratory2NormalParaffinDistributioninDieselFuelIntroductionC10C9C11C12C13C14C15C16C17C18C19C20C21C22C23C24C25C26C27FuelsLaboratory3FilterPluggingMechanismIntroductionCH2CH2CH2H2CH2CTemperaturedecrease.Crystallization.SpiralGrowthinx-yplaneproducesdiamond-shapedflatcrystal.DirectionofCrystalGrowthxAxisyAxisFilterPlugging!FuelsLaboratory4Coldpropertiesvs.VehicleOperability•Cloudpointunderestimatesvehicleoperabilitybutpourpointoverestimatesit.•CFPP*showedgoodcorrelationwithvehicleoperabilityinthosedaysofthemethodestablishment.IntroductionInfineum,WaxCrystalModificationTechnology,1999CFPPApparatus*CFPP:ColdFilterPluggingPointFuelsLaboratory5WaxDispersionIndex•Whendieselisstoredincoldweather,waxcrystalmayagglomerateinbottomlayer.Itmakesthatcoldpropertiesbetweenupperandbottomlayerisuneven.•Toreduceagglomerationofwaxcrystal,itshouldbedispersedwell.•SKhaveusedb-CFPPaswaxdispersionindex.Bottom20%ofsampleisusedforCFPPmeasurementafterstoringdieselat-15℃for16hours.IntroductionTemp.Profileforb-CFPP(SK)WaxDispersionFuelsLaboratory6WaxCrystalModificationwithAdditives•Fuelfiltershavetheporesizeof10~45㎛.Fuelfiltermaybepluggedwhenthesizeofwaxcrystalisbiggerthan200㎛.•Topreventfuelfilterpluggingduetothewaxcrystal,√coldperformanceoffuelshouldbecontrolledinwinter.√poresizeandsurfaceareaoffuelfiltershouldbedesignedproperly.•Forthecontrolofwaxsize,WAFI*hasbeenusedwidely.Toacquiregoodcoldperformanceofdiesel,WAFIshouldbematchedwellwithfuelproperties.Introduction50㎛NoAdditiveWithMDFI*WithMDFI&WASA*Infineum*WAFI:WaxAnti-settlingFlowImprover,MDFI:MiddleDistillateFlowImprover,WASA:WaxAnti-SettlingAgentFuelsLaboratory7GeneralDescriptiononFunctionofWAFIIntroductionCo-crystalizationofWAFIwithnormalparaffinofdieselfuelInterruptionofcrystalgrowthbypendantgroupinWAFIReductionofagglomerationamongwaxcrystalsSmallerCrystalWell-dispersedCrystalPreventionofFilterPluggingImprovementofStorageStabilityFuelsLaboratory8CompositionofWAFIIntroductionWAFIMDFI(ReduceCFPP)WASA(ImproveWDI)NucleatorGrowthArrestorHighmolecularweightAfewpendantgroupinmoleculeFunctionasnucleusandcrystallizeeasily.(Morenucleus,smallercrystal)LowmolecularweightManypendantgroupinmoleculeInterruptthegrowthofcrystalthroughco-crystallizationwithn-paraffinofdiesel.(Inducethelatticedistortion)Aromaticringandolefingroup(Stiffnottofold)Hydrophilicgrouplikeamideoraminesalt(Electrostaticrepulsion)FuelsLaboratory9MechanismofCrystalGrowthwithWAFIIntroductionNormalParaffininDieselWAFIMoleculePendantgroupexcludedfromcrystalsinhibitstheirgrowth.Temperaturedecrease.Crystallization.Smallercrystalformed.FuelsLaboratory10MDFI(Nucleatorvs.GrowthArrestor)•Nucleator√Afewpendantgroupsinmolecule√Highmolecularweight•GrowthArrestor√Manypendantgroupsinmolecule√LowmolecularweightIntroductionFunctionasnucleusandcrystallizeeasily.Decreasethesizeofcrystal.Interruptthegrowthofcrystalthroughco-crystallizationwithn-paraffinofdiesel.FuelsLaboratory11KeyFactorforWAFIPerformance•CarbonNumberDistributionofMDFI•RatioofMDFIandWASA•RatioofNucleatorandGrowthArrestor•FuelPropertiesIntroductionCriterionParameterTargetforResponseCommentDistributionofn-paraffinDistillationD20–D90100℃Indicaterelativeabundanceofdifferentwaxes.FBP360℃Determineheavywaxpresent.WaxPrecipitationRateDistillationD90–FBP(Tail)25~30℃Thelongerthetail,themoregradualiswaxprecipitation.Amountofn-paraffinWaxContent3%Largelydeterminedbycrudesource.1.Introduction2.WAFIstudyinSKBackground/EvaluationofWAFIforH/SDiesel/UtilizationofMDFI&WASA3.SummaryContentsFuelsLaboratory13BackgroundDuetothedevelopmentofdieselenginetechnologyandtheblendingofbiodiesel,coldperformanceofdieselfuelisgettingmoreimportant.Duetothestagnationofdomesticmarket,exportofH/Sdieselhasincreased.Forrefineryoptimization,theflexibilityinproductionmodeofdieselfueliscritical.•ColdperformanceofdieselfuelshouldbeimprovedthroughoptimizationofWAFIoperation.SeparateWAFIforH/SDieselfromthatforULSDUtilizeMDFIandWASAinsteadofWAFIpackageKeroKeroDieselH/SDieselULSDWAFI(A)WAFI(B)WAFIoperationforULSD&H/SDieselOperationofWAFIcomponentsMDFIWASAWAFIComponent*ULSD:UltraLowSulfurDiesel,H/SDiesel:HighSulfurDieselFuelsLaboratory14EvaluationofWAFIforH/SDieselOverview•TestPeriod:(Feb.~Jun.in‘09)•WAFI(total3types):C0(designedforULSD),C1,C2ofCcompany•PerformanceTarget√CFPP:below-15℃,PP:below-25℃•BlendingRatioofBaseFuelFeedstockFuel1Fuel2Fuel3Fuel4Kerosene15151515HCN10101010RHDS-Diesel10301030Light-cutLGO6545--Heavy-cutLGO--6545RemarkLight-cutLGOwasblended.Heavy-cutLGOwasblended.[Unit:Vol.%]*HCN:HeavyCatalyticNaphtha,LGO:LightGasOilFuelsLaboratory15EffectofBlendedLGOEvaluationofWAFIforH/SDieselFuel1(Light-cutLGOBlended)Fuel3(Heavy-cutLGOBlended)-30-25-20-15-10-500%50%100%150%200%C2C1C0Target-40-30-20-1000%50%100%150%200%C2C1C0Target-30-25-20-15-10-500%50%100%150%200%C2C1C0Target-40-30-20-1000%50%100%150%200%C2C1C0TargetCFPP(℃)PP(℃)CFPP(℃)PP(℃)TreatRate(%ofTypicalvalue)TreatRate(%ofTy