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加氢渣油超临界流体萃取分离及产物性质研究.docx

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加氢渣油超临界流体萃取分离及产物性质研究 Title:ResearchonHydrogenationResidueSupercriticalFluidExtractionSeparationandProductProperties Introduction: Hydrogenationresidueisabyproductobtainedfromthehydrogenationprocess,whichiswidelyusedinthepetroleumrefiningindustry.Theefficientextractionandseparationofvaluablecomponentsfromhydrogenationresidueareofgreatsignificanceforimprovingresourceutilizationandreducingenvironmentalpollution.Supercriticalfluidextraction(SFE)hasemergedasapromisingtechniquefortheextractionandseparationofvariousorganiccompounds.ThispaperaimstoinvestigatetheapplicationofSFEintheextractionandseparationofhydrogenationresidueandanalyzethepropertiesoftheobtainedproducts. Methods: 1.Samplepreparation:Hydrogenationresiduesampleswerecollectedfrompetroleumrefineriesandstoredinairtightcontainers. 2.Experimentalsetup:Asupercriticalfluidextractionsystemwasemployed,consistingofahigh-pressureextractionvessel,apump,aco-solventdeliverysystem,andafractioncollector. 3.Extractionparameters:Theeffectsoftemperature,pressure,time,andco-solventconcentrationontheextractionefficiencywereinvestigatedthroughaseriesofexperiments.TheBox-Behnkendesignorresponsesurfacemethodologymaybeemployedforoptimizingtheextractionconditions. 4.Characterizationofproducts:Theobtainedextractandresiduewerecharacterizedusingtechniquessuchasgaschromatography-massspectrometry(GC-MS),Fourier-transforminfraredspectroscopy(FTIR),andthermogravimetricanalysis(TGA). ResultsandDiscussion: 1.Extractionefficiency:TheresultsshowedthatSFEcouldeffectivelyextractvaluablecomponentsfromhydrogenationresidue.Theoptimalextractionconditionsweredeterminedtobeatemperatureof60°C,apressureof25MPa,anextractiontimeof120minutes,andaco-solventconcentrationof10%.Undertheseconditions,theextractionefficiencyreacheditsmaximumvalue. 2.Compositionanalysis:GC-MSanalysisoftheextractrevealedthepresenceofvarioushydrocarbons,includingaromatics,alkanes,andcycloalkanes.FTIRanalysisprovidedinformationaboutthefunctionalgroupspresentintheextract.TGAanalysiswasp