CO偶联再生反应系统的非线性行为研究

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1、天津大学博士学位论文CO偶联再生反应系统的非线性行为研究姓名：徐艳申请学位级别：博士专业：化学工艺指导教师：许根慧;马新宾20030501ABSTRACTTheprocessofproducingdiethyloxalateandoxalicacidbyCOcouplingreactioningaseousphaseWasoneofthemostimportantprojectsofC1chemicaltechnology，duetoitstechnicalpredominance．Basedontheresultsfromtheexperiments，itwasnecessarytost

2、udythenonlinearpropertiesofthereactionsysteminthecontextofindustrialprocessscale—up，controlandoptimization．Unluckily,noreportrelatedtOnonlinearbehavioranalysisformesystempresenteduptOnow．Inthethesis，theanalysisforthiscomplexreactionsystemwascarriedoutindetail．Accordingtothecharacteristicofthesyste

3、m，theschemeservedasthefoundationforthenonlinearanalysiswasproposed，onwhichthewholesystemWaSsimplifiedastwoparts—COcouplingsystemandRegenerationsystem．Thenthedynamicsmodelswerealsosetuprespectively．OnthestudyofCOcouplingsystem，thefinitedifferencemethodandthenumericalcontinuationtechniquewereusedtoc

4、arryoutthebifurcationanalysisinsomedetail．Thestaticbifurcationphenomenawasobservedinsomecases，whereasnoHopfbifurcationpointswasfoundforalltheparameterschoseninthispaper．Itwasshownthatthesystemhadatmostthreesteadystatesolutions．Meanwhile，theinfluenceofthedimensionlessnumberssuchaSPe，Dal，Bi，BI，X2c，y

5、，Ncwereinvestigatedseparately,andtheresultswereillustratedinthe(Dal—Pe)and(Bi—Pe)plane．Theparameterstudydemonstratedthattheaxialmassandheatfeedbackwasthemainfactorresultinginmultiplesteadystates．ForthissystemthestaticbifurcationoccurredonlywhenthevalueofPewasmuchsmaller．Moreover，thestudyprovidedap

6、racticalexampleforthereactionwiththekineticsexpression，=妇』P0”inafixed—bedreactor．Basedontheone-dimensionalplugflowreactormodel，theparametricsensitivityforCO—couplingsystemWaseitherdiscussed．Theanalysisapproachforthereactionsystemwithkineticsri=圮?wasusedforreference．Theformulaeforthetemperatureofcr

7、iticalhotspotwerederivedtheoreticallyandthenumericalprocedureforevaluatingthetemperatureofcriticalhotspotandthecriticalinletconcentrationofCOwasdeveloped．AndTheeffectsofoperationconditionssuchasthetemperatureofin