简介:在这篇论文,为提高轻采油的FCC合作催化剂被大音阶的第五音胶化方法准备,并且它击碎催化剂的残余的表演上的效果在结果显示了的CCFFBreactor.The测试被评估液体产品收益显然增加了,在FCC平衡催化剂的表面与干燥气体的co-catalyst.The收益被使妊娠以后,泥浆和焦炭减少了,当柴油机收益改变了slightly.And时残余的crackability被增加;催化剂表面上的焦炭免职的率被减少,与这些结果显示出的热裂开反应inhibited.All合作催化剂能改进酸地点的密度并且改变催化剂酸味,它能支持由在FCC平衡催化剂的表面上扔合作催化剂延长催化剂活动。
简介:Thedegradationpotentialofadiesel-degradingbacteria(HDMP1)isolatedfromtheoil-contaminatedmarineenvironmentwasexploredsystematicallybyanalyzingtheenvironmentalconditionsandsynergisticactionwithotherdiesel-degradingbacteria.TheresultindicatedthatHDMP1wasconfirmedasastrainofHalomonasbythemethodofstrainidentification.And,HDMP1showedgooddieseldegradationperformancewithadieseldegradationrateofupto79.59%after7days.ByanalyzingtheeffectofenvironmentalconditionsonHDMP1,thebestcarbonandnitrogensourceswerefoundtobelactoseandpeptone,respectively,atapHvalueof7.5andasalinityof4g/(100mL).Additionally,thesynergisticeffectofHDMP1combinedwithotherdiesel-degradingbacteriawasanalyzedbyorthogonalexperimentaldesign.TheinoculaofHDMP1,HDMP2,HDMP3andHDMB3wereoptimized,withthebestresultsequatingto0.4%,0.1%,0.4%and0.9%in100mLofMSM,respectively,whilethedegradationrateofdieselwasidentifiedtobe73.5%within5daysinthepresenceofoptimuminocula.
简介:Inthispaper,anabinitio,localdensityfunctional(LDF)methodwasusedtoexploretherelationshipbetweenthemolecularpropertiesofadditivesandthelubricatingperformanceofaluminumrollingoil.Thestructuralpropertiesofbutylstearate,dodecanol,docosanol,andmethyldodecanoatewerestudiedaccordingtothedensityfunctionaltheory.Thecalculateddatashowedthattheatomsinoraroundthefunctionalgroupsmightbelikelythereactingsites.Becauseofthedifferentfunctionalgroupsandstructureofesterandalcohol,twotypesofcomplexadditives,dodecanolandbutylstearate,methyldodecanoateandbutylstearate,respectively,werechosenforstudyingtheirtribologicalpropertiesandperformingaluminumcoldrollingexperiments.Thetestresultsagreedwiththecalculatedresultsverywell.Thecomplexester,viz.methyldodecanoateandbutylstearate,hadthebestlubricatingperformancewithafrictioncoefficientof0.0841andapermissive-rollingthicknessof0.040mmascomparedwiththatofdodecanol-butylstearate-baseoilformulation.
简介:Methyldiethanolaminefattyacidesters,viz.methyldiethanolamineoctanoateandmethyldiethanolamineoleate,wereprepared.Theirimpactsonthebiodegradabilityandtribologicalpropertiesofmineralbaseoil400SNwereevaluatedbyatesterforfastevaluatingthebiodegradabilityoflubricantsandbyafour-balltester,respectively.Theresultsshowedthatmethyldiethanolamineoctanoateandmethyldiethanolamineoleatebothcouldmarkedlypromotethebiodegradationoftheoilandimproveditstribologicalproperties.Theimprovementofbiodegradabilitywasattributedtotheenhancedgrowthandquantityofmicrobesbymethyldiethanolaminefattyacidesters.Thewornsurfaceswereanalyzedbyascanningelectronmicroscope(SEM)equippedwithanenergydispersivespectrometer(EDS)andanX-rayphotoelectronspectroscope(XPS).Theresultsindicatedthattheenhancementoffriction-reducingandanti-wearpropertiesofthemineraloilwasattributedtotheformationofcomplicatedboundarylubricationfilmscomposedofspeciessuchasFe2O3,Fe3O4andorganicnitrogen-containingcompoundswithastructureof–C-N-orR-NH2.
简介:PurificationoforiginalcrudeglycerolobtainedfrombiodieselproductionwasconductedinalaboratoryscaleequipmentbymeansofacombinedchemicalandphysicaltreatmentmethodbaseduponrepeatedcyclesofacidificationofliquidphasetothedesiredpHvaluebyusing5.85%H3PO4solutionforpHvalueadjustment,andthemixturewaskeptat70℃for60mintomakephaseseparationforobtainingaglycerol-richmiddlephase.Theyieldofcrudeglycerolreached81.2%.Subsequently,uponreactionoftheobtainedglycerolphasewith0.03%ofsodiumoxalateat80℃for30mintheimpurityremovalratewasequalto19.8%.Thefractionboilingbetween164℃and200℃wascollectedbyvacuumdistillationfollowedbydecolorizationwith2%ofactivecarbonat80℃fortwotimestoyieldtheproductglycerolwithanacceptablepurityof98.10%.
简介:SINOPECResearchInstituteofPetroleumProcessing(RIPP)hasdevelopedthedieselengineoilAPICJ-4,afterhavingpassedthe9enginetestsrequiredbytherelevantAPIspecificationstofillChina’sgapintheindependentdevelopmentofformulationsfordieselengineoilCJ-4,whichisasuccessfulattemptinbreakingtheforeigncompanies’technicalmonopolyonhigh-gradedieselengineoils.
简介:ThepolycrystallinephaseWO3/g-C3N4wassynthesizedunderstirringusingtungstenicacid(H2WO4)andgraphiticcarbonnitride(g-C3N4)asrawmaterials.ThecatalystwascharacterizedbyX-raydiffraction(XRD),scanningelectronmicroscopy(SEM),energydispersivespectroscopy(EDS),theFouriertransforminfraredspectroscopy(FT-IR),andtheBrunauer-Emmett-Telleranalysis(BET).ThepolycrystallinephaseWO3/g-C3N4wasdeterminedbyXRDtechnique.TheoxidativedesulfurizationprocesswasinvestigatedusingWO3/g-C3N4asthecatalyst,30%hydrogenperoxide(H202)astheoxidant,and1-butyl-3-methylimidazoliumtetrafluoroborate([bmim]BF4)ionicliquids(ILs)astheextractant.Theoperatingconditions,includingH2WO4amount,ILdose,H2O2volume,temperature,catalystdosage,andtypesofsulfurcompounds,weresystematicallyresearched.Thedesulfurizationratecouldreach98.46%forremovingdibenzothiophene(DBT)fromthemodeloilunderoptimalreactionconditions.Inaddition,thecatalyticactivitywasslightlydecreasedafterfiverecyclesofcatalysts.Thereactionkineticsanalysisshowsthattheoxidativedesulfurizationsystemwasinaccordwiththefirst-orderreactionkineticsequation.Themechanismofoxidativedesulfurizationwasproposed.
简介:ThemoleculartransformationsofcarboxylicacidsinheavyacidicSLcrudebeforeandaftertrueboilingpointdistillationwereexaminedbyultra-highresolutionnegative-ionelectrosprayionization(ESI)Fouriertransformioncyclotronresonancemassspectrometry(FT-ICRMS).Theacidclass(heteroatomnumber),type(znumbers)andcarbonnumberdistributionswerepositivelycharacterized.Itwasfoundoutthatthetotalacidnumber(TAN)ofSLcrudedecreasedaftertrueboilingpointdistillation,andtheabundanceofO2classinmassspectrawasalsofoundtobereducedfrom67.6%to34.5%inSLTBPmixedcrudeasmeasuredbyMSspectra,indicatingtoapotentialcarboxylicaciddecomposition.However,itwasinterestingthatthecarboxylicacidstypedistributioninbothoilswasalmostthesamealthoughtheirrelativeabundanceinSLTBPmixedcrudeturnedtobemuchlower,suggestingthatvariouspetroleumcarboxylicacidtypeshavethesimilarthermaldecompositionreactionbehavior.Furthermore,foreachO2typeofacidsinSLTBPmixedcrude,theabundanceofcarboxylicacidswithcarbonnumberhigherthan35wasreducedgreatly,especiallyforthosewithcarbonnumberhigherthan60,themasspeaksofwhichwerenearlytotallyremoved,indicatingthatthelargecarboxylicacidmoleculesinheavyfractionsdecomposedmoresignificantlybecauseoflongerheatingtimeduringthetrueboilingpointdistillationprocess.Asaresult,thereductionofTANmaybecausedbythethermaldecompositionofcarboxylicacidsespeciallythosewithhighcarbonnumber,suggestingthatquickdistillationormuchlowerpressureisrequiredtoavoidthethermaldecomposition.