外文翻译原文及译文:一种新型甲醇低温合成路线:醇类溶剂的催化作用.docx
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1、英文参考文献及译文目:ANewLow-TemperatureSynthesisRouteofMethanol:CatalyticEffectoftheAlcoholicSolvent学 系 专 班院:别:业:级:指导教师:ANcwLow-TemperatureSynthesisRouteofMethanol:CatalyticEffectoftheAlcoholicSolvent1. IntroductionGas-phasemethanolisbeingproducedindustriallyby30-40milliontonperyeararoundtheworld,fromCO/CO2H
2、2atatemperaturerangeof523-573Kandapressurerangeof50-100bar,usingcopper-zinc-basedoxidecatalyst.Undertheseextremereactionconditions,theefficiencyofmethanolsynthesisisseverelylimitedbythermodynamicsasmethanolsynthesisisanextremelyexothermicreaction.1,2Forexample,at573Kand50bar,itiscalculatedbythermody
3、namicsthattheoreticmaximumone-passCOconversionisaround20%forflow-typereactorwhenH2CO=2.Alsoitisreportedthattheone-passCOconversionintheindustrialICIprocessisbetween15and25%,evenifH2-richgasisused(H2CO=5,523-573K).3Therefore,developingalow-temperatureprocessformethanolsynthesis,whichwillgreatlyreduce
4、theproductioncostandutilizethethermodynamicadvantageatlowtemperature,ischallengingandimportant.3Ifconversionishighenoughinmethanolsynthesis,recyclingoftheunreactedsyngascanbeomittedandaircanbeuseddirectlyinthereformer,insteadofpureoxygen.Generally,low-temperaturemethanolsynthesisisconductedintheliqu
5、idphase.methanolsynthesisfromCOH2containingCo2,asamorepracticalwayofmethanolsynthesis,isproposed.Itconsistsofthefollowingfundamentalsteps:Asformicacidwasnotdetectedintheproducts,wesuggestedthereactionpathasstep(2).TsubakietaLinvestigatedthesynthesisreactionofmethanolfromCOCO2H2,usingethanolasreactio
6、nmediuminabatchreactorandfoundhighselectivityformethanolformationattemperatureaslowas423-443K.26Inthiscommunication,thecatalyticpromotingeffectsofdifferentalcoholsonthesynthesisofmethanolfromCO/CO2H2onCu/ZnOcatalystwereinvestigated.HighyieldsOfmethanolwererealizedwhilesomealcoholswereutilized.2. Exp
7、erimentalSectionThecatalystwaspreparedbytheconventionalcoprecipitationmethod.Anaqueoussolutioncontainingcopper,zincnitrates(Cu/Zninmolarratio=1),andanaqueoussolutionofsodiumcarbonatewereaddedsimultaneouslywithconstantstirringto300mLofwaterTheprecipitationtemperatureandpHvalueweremaintainedat338Kand8
8、.3-8.5,respectively.Theresultingprecipitatewasfiltratedandwashedwithdistilledwater,followedbydryingat383Kfor24handcalcinationat623Kfor1h.Thisprecursorwasthenreducedbyaflowof5%hydrogeninnitrogenat473Kfor13handsuccessivelypassivatedby2%oxygendilutedbyargon-TheBETsurfaceareaforthecatalystwas59.4m2g.The
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