化学反应工程课件2

《化学反应工程课件2》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、ReactionsandReactionRatesNewconcepts•Homogeneousandheterogeneousreaction•Reversibleandirreversible•Exothermicandendothermic•Singlephaseormultiphase•Catalyticandnoncatalytic•Stoichiometricequationandkineticequation•Singlereactionandmultiplereactions•Massandheattransfer•Reactionrate

2、andrateequation•Elementaryandnonelementaryreaction•Molecularityandreactionorder•Powerlawandhyperboliclaw•Pre-exponentialfactorandreactionrateconstant•Concentrationandtemperaturesensitivity2Importantpointsinlastlecture•CREdealswithchemicallyreactivesystemsofengineeringsignificance.

3、•ChemicalKinetics&ChemicalReactorDesignwillbetheheartofthiscourse3Chemicalkinetics•Dealswithhowfastreactionproceeds(reactionratesataspecifiedconditions)•Dealswithmechanismofreaction•DealswiththeeffectsofP,T,compositionandcatalystsonreactionrates4ProperreactordesignultimateaimofCRE

4、•Reactortypeandsize•Reactorconfiguration•Heatandmasstransfer5Operationanddesignproblems•Operationproblem–Given:inletorinitialcondition,reactortype,configurationandsize,operatingcondition–Tofindoutoutletcomposition•Designproblem–Given:inletorinitialcondition,operatingcondition,outl

5、etrequirement–Tofind:reactortype,configurationandsize•Reactoranalysisprovidesthetheoreticalfoundationtosolvetheseproblems•Reactoranalysisistobuildtherelationbetweenthesevariables.6PerformanceequationsinputandoutputrelationsInputReactorOutputContactingpatternKineticsEquilibriumHeat

6、ormasstransferoutput=f[input,kinetics,contacting]Goalofreactoranalysis7IdealReactors•Batch•Plugflow–PlugFlowReactor(PFR)•MixedflowUniformlymixed8IdealReactors•Batch•Plugflow–PlugFlowReactor(PFR)•Mixedflow9IdealReactors•Batch•Plugflow–PlugFlowReactor(PFR)•MixedflowFeedProductUnifor

7、mlydistributedinradialdirection10IdealReactors•Batch•Plugflow–PlugFlowReactor(PFR)•Mixedflow11IdealReactors•Batch•Plugflow•Mixedflow–ContinuouslyStirredTankReactor,CSTRFeedProductUniformlymixed12IdealReactors•Batch•Plugflow•Mixedflow–ContinuouslyStirredTankReactor,CSTR13Homogeneou

8、s&HeterogeneousReactions•Homogene