简介：棉花纤维素动态地处于亚andsupercritical状态与乙醇被提取。变换的度是95.4%，当棉花纤维素non-isothermally从20与乙醇被提取时，摘录收益是55.2%吗？？

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简介：Acombustionmodelofalarge-scalesupercriticalcirculatingfluidizedbed(CFB)boilerwasdevelopedforcomprehensivecomputational-fluid-dynamicsanalysis.Themodelincorporatesgas-solidhydrodynamics,coalcombustion,heattransferonheatexchangesurfacesinthefurnace,andheattransferbetweenfumaceandworkingmediumintheheattransfertubes.Insimulatingthedenseanddilutephasesinthefumace,thegas-solidhydrodynamicsisbasedontheEuler-Eulermodelandenergy-minimizationmultiscaledragmodel.Coalcombustionentailsevaporation,devolatilization,charcombustion,gashomogeneousreaction,andpollutantemission.Thecoefficientofheattransferbetweengas-solidandthewaterwallisestimatedusingtheclusterrenewalmodel,andforradiation,thediscreteordinatemodelisused.Moreover,thermohydraulicprocessesinthemembranewallarealsoineludedintheheattransferprocess.Themodelwassuccessfullyappliedinsimulationsofa350-MWsupercriticalCFBboiler.Detaileddistributionsofsolidsconcentration,oxygen,heatflux,andworkingmediumtemperatureintheboilerfurnacearepresented.

简介：Supercriticalwaterreactor(SCWR)wasproposedasaGenerationⅣconceptforbuildinglargecapacitynuclearpowerplants.ComparingwiththepresentGenerationⅡandⅢlightwaterreactors,SCWRpossessesgreatadvantagesof10%higherefficiency,simplersystemdesign,bettersustainability,andsoon.However,theselectionofmaterialsforfuelcladdingandreactorinternalsofSCWRisfacingagreatchallenge.Corrosioninsupercriticalsteamisofthefirstimportantissuetobesolvedtomeetthestringentrequirementofthereactorinternalcomponents.Corrosionscreeningtestswereconductedoncandidatematerialsfornuclearfuelcladdingandreactorinternalsofsupercriticalwaterreactor(SCWR)instaticandre-circulatingautoclaveatthetemperaturesof550,600and650℃,pressureofabout25MPa,deaeratedorsaturateddissolvedhydrogen(STP).NickelbasealloytypeHastelloyC276,austeniticstainlesssteelstype304NG,AL-6XN,HR3C.NF709andSAVE25,ferritic/martensitic(F/M)steeltypeP92,P122and410,andoxidedispersionstrengthenedsteelMA956,aretested.Thispaperpresentscorrosionrate,andfocusesontheformationandbreakdownofcorrosionoxidefilm,andproposesthefuturetrendforthedevelopmentofSCWRinternalstructurematerials.

简介：Theunit5ofHuangdaoPowerPlantwhichwasfinancedandbuiltbyQingdaoGuoxinIndustrialCo.,Ltd.carriedout168-hourtrialoperationonOctober24.Itsloadfactorreachedover98%.Alltheindexesoftrialoperationwereexcellent.Atpresent,theunitisinoperationundertheconditionsoffullprotection,fullautomationandfullload.

简介：Thestudyonretentionbehaviorinsupercriticalfluidchromatography(SFC)isnecessarytounderstandthemechanismofthevariousinteractionsinSFC.TheretentionofSFCincarboxylicacidmethylester/polymethylsiloxane/CO2systemwasstudiedsystematicallyandtheretentionbehaviorofthiskindofcompoundsundervarioustypicaloperationconditionswasdescribedusingthemethodofanalternativeunifiedtheoryofchromatographicretention.Theresultsillustratedthatexpression:Ink.=a+b/T+cp+dp/T+ep2/Tcanbeusedtodescribequantitativelytheretentionbehaviorofcarboxylicacidmethylester/polymethylsiloxane/CO2systemintherangesofreduceddensityfrom0.549to1.411.Itwasalsofoundthattheentropyofsoluteinstationaryphaseisdependentonthedensityofsupercriticalfluid(SF)undertypicaloperatingconditionsofSFC.

简介：WeinvestigatethenonlinearSchrdingerequationiut+△u+|u|p-1u=0with1+4/N||Q||（1-sc）/sc|▽Q||2,theneitheru（t）blowsupinfiniteforwardtimeoru（t）existsgloballyforpositivetimeandthereexistsatimesequencetn→+∞suchthat||▽u（tn）||2→+∞.HereQisthegroundstatesolutionof—（1—sc）Q+△Q+|Q|p-1Q=0.Asimilarresultholdsfornegativetime.Thisextendtheresultofthe3DcubicSchr（o|¨）dingerequationobtainedbyHolmertothegeneralmass-supercriticalandenergy-subcriticalcase.

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简介：Asimulationforpistoneffectinsupercriticalcarbondioxidebyemployingasimplemodelisconducted.Inthefirstplace,thethermalpropertiesofcarbondioxidenearitsliquid-vaporcriticalpointarediscussed.Itiscalculatedthattheheatcapacityratioandisobaricexpansioncoefficientofsupercriticalfluidsareextremelyhigh.Furthermore,thesimulationforpistoneffectinsupercriticalcarbondioxidebetweentwoinfiniteverticalwallsispresented.Thenumericalresultsprovethatpistoneffecthasamuchfasterspeedofheattransferthanthermalconductionundermicrogravityconditions.Moreover,thepistoneffectturnsouttobestrongerwhenclosertothecriticalpoint.

简介：Asanewjettechnologydevelopedinrecentyears,thesupercriticalcarbondioxide(SC-CO2)jettechnologyenjoysmanyadvantageswhenappliedinoilandgasexplorations.InordertostudythepropertiesandparametricinfluencesoftheSC-CO2jet,theflowfieldsoftheSC-CO2jetaresimulatedusingthecomputationalfluiddynamicsmethod.TheflowfieldoftheSC-CO2iscomparedwiththatofthewaterjet.TheinfluencesofseveralparametersontheflowfieldoftheSC-CO2jetarestudied.Itisindicatedthatlikethewaterjet,thevelocityandthepressureoftheSC-CO2jetcouldbeconvertedtoeachother,andtheSC-CO2jetcangenerateasignificantimpactpressureonthewall,theSC-CO2jethasastrongerimpactpressureandahighervelocitythanthoseofthewaterjetunderthesameconditions,themaximumvelocityandtheimpactpressureoftheSC-CO2jetincreasewiththeincreaseofthenozzlepressuredrop,underthestimulationconditionofthisstudy,theinfluenceoftheSC-CO2temperatureontheimpactpressurecanbeneglectedinengineeringapplications,whilethemaximumvelocityoftheSC-CO2jetincreaseswiththeincreaseofthefluidtemperature.ThispapertheoreticallyexploresthepropertiesoftheSC-CO2jetflowfield,andtheresultsmightprovideatheoreticalbasisfortheapplicationoftheSC-CO2jetinoilandgaswelldrillingsandfracturingstimulations.

简介：Takingextractionrateasanindicator,theextractiontechnologyofChinese-firheartwoodbysupercriticalcarbondioxidetreatmentwasstudied,andtheextractionrateoftheSFE-CO2methodwascomparedtothatoftraditionalextractionmethod.Theresultsshowthatwhenextractionprocessingconditionwere:extractionpressure30MPa,extractiontemperature40℃,extractiontime120m,andflowvelocity20kg/h,theextractionrateofSFE-CO2was0.99%,0.20%morethanthatofthetraditionalextractionmethod.However,takingthecostintoconsideration,itisproposedthatthetraditionalextractionisusedunlesstherearespecificrequirements.

简介：ThispaperpresentstherheologicalbehaviourofsupercriticalCO_2(sCO_2)foamatreservoirconditionsof1500psiand80°C.DifferentcommercialsurfactantswerescreenedandutilizedinordertogenerateafairlystableCO_2foam.Mixedsurfactantsystemwasalsointroducedtogeneratestrongfoam.Foamrheologywasstudiedforsomespecificfoamqualitiesusingahighpressurehightemperature(HPHT)foamlooprheometer.Atypicalshearthinningbehaviourofthefoamwasobservedandasignificantincreaseinthefoamviscositywasnoticedwiththeincreaseoffoamqualityuntil85%.Adesiredhighapparentviscositywithcoarsetexturewasfoundat85%foamquality.Foamvisualizationabove85%showedanunstablefoamduetoextremelythinlamellawhichcollapsedandtotallydisappearedinthelooprheometer.Below5_2%,anon-homogenousandunstablefoamwasfoundhavinglowviscositywithsomeliquidaccumulationatthebottomofthecirculationloop.ThisresearchhasdemonstratedrheologyofsCO_2foamsatdifferentqualitiesatHPHTtoobtainoptimalfoamqualityregionforimmiscibleCO_2foamco-injectionprocess.

简介：Sincethefirstbatchof350-MWsupercriticalutilityboilerswasputintooperation,theexhaustfluegastemperatureoftheboilershasalwaysbeenhigherthanthedesignedvalue.Themainreasonisthattheheatabsorbedbytheairheaterisnotsufficient.InHuanengDongfangPowerPlant,theexhaustfluegastemperatureisloweredthroughmodificationstotheeconomizerandtheairheater.Theexperimentalresultsrevealthateveryyear,eachboilercouldsave3850tonsofstandardcoalandreduce85tonsofSO2and9000tonsofCO2respectivelyafterretrofit.

简介：ThePLCanduppercomputerareusedinBOPcontrolsystemoftraditionalthermalpowerplanttomonitorthein-situequipment.Itiscomplicatedandwasteslaborandresources.Itisdifficulttomaintainandmanagethem.BeijingGuoDianZhiShenControlTechnologyappliedthehomemadeDCS(EDPF-NTSystem)totheintegratedBOPcontrolsystemof600-MWsupercriticalpowerunit,whichoffersadvantagesinefficiencypromotion,costreductionandresourcesharing.ThatalsoreflectsthedominanceofEDPF-NTSysteminperformance,price,real-timeDUP,networkcompatibilityandcommunication.Thisarticleintroducesthemaincharacteristics,structureandconfigurationofEDPF-NTSystem,aswellasthehierarchicaloperation,themulti-domainnetworkstructureandtheprivatenetworkrouterdevelopedforZhuanghePowerPlant.

简介：ObjectiveUnderstandingthedynamicsofsedimentgravityflowsisofgreatimportancetocorrectlyinterprettheirrelateddeposits.Thediscoveryofsupercriticalsedimentgravityflowsprovidessomenewviewpointsfortheexplanationofcontroversialsedimentgravityflowdeposits.However,thedynamics,formation,evolutionprocessesofsupercritical

简介：Organicmatterwasexperimentallyextractedbysupercriticalfluids(CO2+1%isopropanol)frompetroleumsourcerocksofdifferentthermo-maturitiesatdifferentburieddepthsinthesamestratigraphicunitintheDongyingBasin.Theresultsshowthatsupercriticalfluidextraction(SFE)ismoreeffectivethanSoxhletextraction(SE),withhigheramountsandgreatervarietiesofhydrocarbonsandsolubleorganicmatterbecomingextractive.ThesupercriticalCO2extractionisthereforeconsideredmorevaluableinevaluationofpetroleumsourcerocksandoilresources,particularlythoseofimmaturetypes.

简介：超级批评二氧化碳+n-hexanesystem的蒸汽液体平衡数据在313点被测量。15K，333。15K，353。15K，并且373。15K和他们的莫尔体积和密度在批评的潜水艇并且超级临界区域从2两个都被测量。用一个可变卷的压热器的15to12.63MPa。包括系统的莫耳分率，密度，和莫尔体积的热力学的性质被HeiligandFranck，一个排斥术语和一个方形井的潜在的吸引力在称为与状态的一个方程计算因为分子间的相互作用被使用。对明智的联合统治被用来计算方形井的分子的相互作用潜力和三个可调节的参数(ω，k_ε，k_σ)被获得。状态的TheHeilig-Franck方程被发现与二氧化碳+n己系统的二进制vapor-liquidequilibrium数据有好关联。

简介：在这研究，实验在水的热转移上为调查被执行了在一向下与20公里和45的一个使倾向的角度的一条内部直径使试管倾向了吗？

简介：Variousagriculturalcropresiduesincludingcornstover,corncob,andsorghumstalkwithamoisturecontentof75wt%weresubjectedtoalongpretreatment(12-60h)withsupercriticalCO2(scCO2),atlowtemperature(50-80℃)andapressureof17.5-25.0Mpa.Thesugaryieldsfromtheenzymatichydrolysis(EH)ofthepretreatedsampleswereasmuchasthree-tofourfoldgreaterthanthoseaffordedbytherawmaterials.However,whenpretreatmentwasconductedwithinashorttime(e.g.0.5h),aspreviouslyreportedintheliterature,onlyaslightincreaseintheEHsugaryieldswasobserved.TheproposedscCO2pretreatmentmechanismdemonstratedtheroleofmoistureinthesystem.Wetting,softening,andswellingwereobservedtomainlyaffectthelignocellulosewhenasuitableamountofwaterwasadded.Finally,thesampleswereanalysedbyX-raydiffractionandscanningelectronmicroscopy,beforeandafterpretreatment,toinvestigatethechangesinthemicroscopicstructureofthebiomass.

简介：Asupercriticalcarbondioxide(ScCO2)assistedphaseinversionwasdevelopedtoproducemicroporouspoly(vinylidenefluoride)(PVDF)membraneswhosemorphologycharacteristicsarisefrombothliquid-liquiddemixingandsolid-liquiddemixing(crystallization).ThisresultwasconfirmedbyFouriertransforminfraredspectroscopy(FTIR),fromwhichbothαandβcrystalswerefound.Asrevealedbycontactangleexperiment,thePVDFmembranespreparedviaScCO2assistedphaseinversionweremorehydrophobiccomparedwiththecontrolmembraneproducedviaconventionalimmersionprecipitationtechnique.Inparticular,thesamplewith15wt%PVDFpreparedat45°Cand13MPaexhibitedacontactangleof142°,whichwasmainlycausedbythemultilevelmicro-andnano-structure.Theeffectsofpolyethyleneglycol(PEG),polyvinylpyrrolidone(PVP)andlithiumchloride(LiCl)onthestructuresandcrystalformwereinvestigated.PVPpromotedtheformationofβphasecrystalform,whilePEGbooststheevolutionofαphase.LiClrestrainedthecrystallizationdegreeofPVDFmembraneunderScCO2.