简介：Theconsumptionofsteamasatraditionalmeansforfeedstockatomizationaccountsforarelativelylargeshareintheprocessenergyuseandmakesupthemainpartofsulfurcontainingwastewater.ThisarticleonthebasisofcomprehensiveanalysisputsforwardapropositiononusingtheFCCoffgasasthemediumforatomizingtheFCCfeed,whichwouldplayarealisticroleforenergyconservationandenvironmentalprotectionofFCCprocess.

简介：Exo-tetrahydrodicyclopentadiene(exo-TCD)是在房间温度在H类型沸石(H)上使不能调动的重要高精力的fuel.Silicotungstic酸(SiW)被用来与催化剂的不同SiWcontents.Catalytic表演准备H沸石催化剂经由endo-tetrahydrodicyclopentadiene(endo-TCD)的异构化在exo-TCD的准备期间被调查催化剂的.The性质由XRD描绘了，温度氨(NH3-TPD)的规划解吸附作用，英尺红外，和N2广告

简介：Thehighshearagitationdevicewasfirstadoptedforgasolinedesulfurizationbyionicliquids.Theeffectofbenzylimidazolfluoborateindesulfurizationofgasolineandtheinfluenceofmoistureondeuslfurizationratewereinvestigated.Theexperimentalresultsshowedthattheionicliquidcouldeffectivelydecreasethesulfurcontentofgasolineandtheoptimalconditionswereasfollows:Thereactioncouldbecarriedoutatroomtemperature,avolumetricratiobetweenoilandtheliquidof2∶1,avolumetricratiobetweenwaterandionicliquidof0.04∶1,arotationalspeedof5krad/s,andareactiontimeof1minute.Thedesulfurizationrateofgasolinereached53.6%,andthegasolineyieldwasupto97.3%.Theionicliquidcouldberecycledforrepeateduse,andtheuseofhighshearagitationforgasolinewouldhavegoodprospects.

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简介：Nitrogencontentisanimportantparameterforpetroleumrefiningprocesses.Thecombineduseofmid-infraredattenuatedtotalreflectionspectroscopyandmultivariatecalibrationallowsaccuratedeterminationofnitrogencontentinpetroleumanditsproducts.Thecalibrationmodelsofnitrogencontentincrudeoilshavebeenestablishedbypartialleastsquares(PLS)method.Theresultspredictedbythismethodwereveryclosetothosedeterminedbystandardmethods.Comparedwithstandardmethods,thismethodisprovidedwithadvantagessuchashigh-speed,simplicityandgood-repeat-abilitywithoutanyneedsforpretreatment.

简介：Anaccurateandcompletegeometricmodelwasconstructedtosimulatethecombustion,flowandtemperatureenvironmentintheradiantsectionofthesteamcrackingfurnace.Simulationofflowandradiationstatushasutilizedthestandardk-εmodelandP1model.Thefinite-rate/eddy-dissipation(finite-rate/ED)combustionmodelandnon-premixedcombustionmodelwerebothusedtosimulateaccuratelythecombustionandtheoperationstatusofthesteamcrackingfurnace.Threedifferentsurfacesofthesteamcrackingfurnacewereobtainedfromthesimulation,namely:thefluegastemperaturefieldoftheentrancesurfaceinlongflameburners,thecentralsurfacelocationoftubes,andthecrossoversectionsurface.Detailedinformationonthefluegastemperatureandthemassconcentrationfractionofthesedifferentsurfacesinthesteamcrackingfurnacecanalsobeobtainedbythesimulation.Thispaperanalyzedandcomparedthesimulationresultswiththetwocombustionmodels,estimatedtheoperationstatusofthesteamcrackingfurnace,andreportedthatthefinite-rate/EDmodelisappropriatetosimulatethesteamcrackingfurnacebycomparingkeysimulationdatawithactualtestdata.Thisworkhasalsoprovidedatheoreticalbasisforsimulatingandoperatingthesteamcrackingfurnace.

简介：Inordertoseparatemethylacetateandmethanolazeotrope,theionicliquid(IL)1,3-dimethylimidazoliumdimethylphosphate([DMIM]DMP)wasusedasthesolvent.TheAspenPlussoftwarewasusedtodesignandoptimizetheextractivedistillationprocess.Undertheoptimizedconditions,themassfractionsofmethylacetateandmethanolwerebothabove99.5%.Comparedwiththedimethylsulfoxide(DMSO)process,the[DMIM]DMPprocesshastheadvantagesofsavingenergyandlowerequipmentinvestmentcost.Theresultshowsthatusing[DMIM]DMPasthesolventtoseparateamethylacetateandmethanolazeotropehasbetterprospectinindustrialapplication.

简介：Thesupportγ-Al2O3wastreatedwith1-methylnaphthaleneasthemodelreactantbyrespectivelyusingthechemicalstaticadsorptionmethodandtheacceleratedcokingmethodtostudythecokingsitesofγ-Al2O3surface.Thecarbonspeciesformedonγ-Al2O3surfacewereanalyzedbyCAT-CS,TG-MS,IR-OH,andPy-IRtechniques.TheresultsofcharacterizationbyCAT-CSandTG-MStechniquesindicatedthatthecarbonspeciesformedduringthechemicalstaticadsorptionprocessismainlycomposedofthereversiblyadsorbedcokeprecursorswithalowly-condensedstate,whilethatformedaftertheacceleratedcokingprocessisprobablyrelatedwiththeirreversiblyadsorbedcokedepositswithahighly-condensedstate.TheresultsofcharacterizationbyIR-OHandPy-IRtechniquesfurtherimpliedthattheformationofthetwokindsofcarbonspecies,i.e.,cokeprecursorsandcokedeposits,arecloselyrelatedwiththebasichydroxylgroupsandthestrongLewisacidsitesonγ-Al2O3surface.Theresultsleadtoadeepinsightintothecokingmechanismonthealuminasurface.

简介：Inthisstudy,themainfactorsinfluencingthemeasurementsbymeansoftheoff-linelow-field1HNMRinthelabwerediscussedbaseonarobustcalibrationmodelestablishedbythePLSalgorithmusing255crudeoilsamples.Thepreheatingtemperaturehadagreatinfluenceontheviscosityofoilsamplesandtheresolutionofspectralanalysis.Therepeatabilityofspectralmeasurementswasimpactedbythemetalandwaxcontentoftheoilsamples.Forthecaseofhighwaxcontentoils,thewaxspeciesbegantocrystallizeinthecourseofdeterminationthatcouldaffecttherepeatabilityofspectralmeasurements.ThesefactorshaveevidencedwhythepreheatingdevicesandfilterunitarenecessarywhenlowfieldNMRsystemisusedintheonlineanalysisprocess.Theinvestigationisveryimportantfortheon-lineapplicationofthelowfieldNMR.

简介：Inthisresearch,thedegradationofdibenzothiophene(DBT)wasinvestigatedbyusingPseudomonassp.LKY-5isolatedfromoilcontaminatedsoil.Theresponsesurfacemethodology(RSM)basedontheBox-Behnkendesign(BBD)wasappliedforevaluatingtheinteractiveeffectsoffourindependentvariablesincludingsubstrateconcentration,temperature,pHandagitationrateontheDBTremovalresponse.Atotalof29experimentsforfourfactorsatthreelevelswereconductedinpresentstudy.Asecond-orderregressionmodelwasthendeveloped,andtheanalysisofvariance(ANOVA)illustratedthattheproposedquadraticmodelcouldbeutilizedtonavigatethedesignspace.Thevalueofdeterminationcoefficient(R2=0.9534)indicatedasatisfactoryagreementbetweenthequadraticmodelandtheexperimentaldata.ItwasfoundthatDBTremovalwasmoresignificantlyaffected(P<0.0001)bysubstrateconcentrationcomparedwithotherthreeparameters.An100%degradationofDBTcouldbeobtainedbyPseudomonassp.LKY-5atasubstrateconcentrationof100mg/L.

简介：BytheendofApril2008the500kt/aCTM(coal-to-methanol)unithadstablycrankedoutmethanolatLongyuCoalChemicalCompanyunderYongchengCoalPowerGroup.Analysisofproducthadrevealedthatthequalityof

简介：Thenaturalconvectionheattransferofa60%sucrosesolutioninaverticalconverging-divergingtube(CD)withregularly-spacedtwistedtapes(RSTT)hasbeeninvestigatednumericallyandexperimentally.TheeffectsofwalltemperatureandnumberofRSTTontheNusseltnumberwerestudiedindetail.Thedistributionsofvelocityandtemperatureinthe60%sucrosesolutionwerestudiedandthesimulatedresultsofCDwithRSTTwerecomparedwiththoseofthesmoothtube.TheinfluenceofRayleighnumberandRSTTontheNusseltnumberwasconductedexperimentally.TheresultsindicatethattheNusseltnumberofthe60%sucrosesolutionobviouslyincreasedwiththenumberofRSTTbutincreasedinconspicuouslywith2andmoretwistedtapes.Thesimulationshowsthatthedistanceforachievinganoptimalheattransferperformanceis46timesthediameterofthetube.Themechanismofthenaturalconvectionheattransferenhancementofthe60%sucrosesolutioninrelationshipwiththeCDandtheRSTTwasanalyzed,andthechangeofaveragetangentialvelocitywiththeaxialdistancewaspresentedtodemonstratethattheenhancementofheattransferwasrealizedmainlybecauseoftheincreaseintangentialvelocity.