电脑桌面
添加小米粒文库到电脑桌面
安装后可以在桌面快捷访问

化学反应工程-exercise_2_answerVIP免费

化学反应工程-exercise_2_answer_第1页
1/22
化学反应工程-exercise_2_answer_第2页
2/22
化学反应工程-exercise_2_answer_第3页
3/22
1ExercisesforChemicalReactionEngineeringI.Fillineachblankwithanappropriatetermorvalue:1.Inthethreeidealreactors,batchreatorisanunsteady-stateoperationwherecompositionchangeswithtimebutthecompositionisuniformthroughoutthereactor.Plugflowreactorandmixedflowreactorarethetwosteady-stateflowreactors,thefirstisusuallycalledPFRwhichhasnobackmix,theotherisusuallycalledMFRorCSTRwhichhasthemaximalextentofbackmix.2.H2andO2combustcompletelyina0.2m3reactorandtheflowrateofH2Ooutofthereactoris6kmol/s.ThentherateofreactionofO2is15kmol/(m3.s).3.Iftherateexpressionof2AAABdCr0.05CCdt3(mol/mmin)isrewrittenas'2AAABdPrkPPdt(min/MPa),thenthevalueoftherateconstantk4.52×103(MPa-2min-1).Thereactantgasescanbeseenasidealandthetemperatureis400K.4.Therateexpressionofareaction,0.50.5ABRSis0.52AABrCCTherateequationisifthestoichiometricequationiswrittenas22ABRS.5.ForthereactionArR,therateequationis220AArCmol/(cm3.min).Thentherateconstantis1.2×10-3m3/(mol.hr).6.At1200K,thereactionrateofAis30timesasrapidlyasat1000K.Theactivationenergyforthisreactionis169.7kJ/mol.7.LiquidA(CA0=1mol/Liter)decomposesbysecondorderkinetics,2AArkC.50%Aisconvertedin10minutesinabatchreactor.Therateconstantofthisreaction,k=0.1liter/(mol.min)(unitsshouldbegiven).If80%Aistobeconverted,weshouldmakea40minutesrun.0.52AABrCC28.Anelementaryreactionsinseries,12kkARS(k1=k2)takesplaceinabatchreactor.TheinitialconcentrationofAisCA0,andthatofRandSareCR0=CS0=0.Whent=1/k1,theconcentrationofRreachesthemaximumvalue,whichisequaltoCA0/e.9.Foragasphasevaryingvolumereaction32ABR,someinertgas,Arisintroducedintothereactantmixture.TheproportionbetweenAr,AandBis2:1:3(mol)initially.Thefractionalchangeinvolumeofthesystem,A=-1/3.IftheconversionofAis60%,Thevolumeofthesystemis0.8timesashighastheinitialvolume,V0,andtheconcentrationofA,CAis0.5timesashighastheinitialconcentrationCA0.10.Thetwomethodsforanalyzingkineticdataweusuallyuseareintegralanddifferentialmethods.11.Forreactionsinparallel,ahighreactantconcentrationfavorsthereactionofhigherorder,andalowreactantconcentrationfavorsthereactionoflowerorder.Ahightemperaturefavorsthereactionofhigheractivationenergy,andlowtemperaturefavorsthereactionofloweractivationenergy.12.ConsideraporouscatalystparticlebathedbyreactantA.TherateofreactionofAfortheparticleasawholemaydependon:①surfacekinetics;②porediffusionresistance;③temperaturegradientswithintheparticle;④filmtemperaturegradients;⑤filmdiffusionresistance.13.Aplugflowreactor(2m3)processesanaqueousfeed(100liters/min)containingreactantA.Thereactionisreversibleandrepresentedbymin/,01.004.0,litermolCCrRARAATheequilibriumconversionofAis0.8,andtheactualconversionachievedinthereactoris0.506.14.GiventhemultiplereactionwithE1=50,E2=100,E3=120,andE4=60respectivelyforeachstep,3)(31desiredSRA24TUFormaximizingtheyieldofS,weshoulduse:CA.Highertemperature;B.Lowertemperature;C.Risingtemperaturewithproceedingofthereaction.15.Foranirreversiblesinglereactionwhoserateequationis–rA=kCAn(n>0),theplugflowreactorisalwayssuperiortothemixedflowreactor.Isthispointofviewright?yes(fill‘yes’or‘no’).Forareactioninseries,iftheintermediateisourdesiredproduct,thentheaboveconclusionisrightornot?yes(fill‘yes’or‘no’).16.SeeFigure1,anaqueousreactantstreampassesthroughthetwo-reactorsetupsconnectedinseriesshownascase(a)and(b):Figure1Ifeachunithavethesamespacetimeandisoper...

1、当您付费下载文档后,您只拥有了使用权限,并不意味着购买了版权,文档只能用于自身使用,不得用于其他商业用途(如 [转卖]进行直接盈利或[编辑后售卖]进行间接盈利)。
2、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。
3、如文档内容存在违规,或者侵犯商业秘密、侵犯著作权等,请点击“违规举报”。

碎片内容

化学反应工程-exercise_2_answer

确认删除?
VIP
微信客服
  • 扫码咨询
会员Q群
  • 会员专属群点击这里加入QQ群
客服邮箱
回到顶部