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ID:5655049
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时间:2017-12-21
《化学英语证书考试(pec)-化工应用术语》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、化学英语证书考试(PEC)-化工应用术语absorptionUptakeofagasintothebulkofaliquid.Gasabsorptiontakesplaceforexampleintheliquidofascrubbertowerwhereanup-streaminggasiswashedbyadown-goingflowofascrubbersolution.adsorptionAttachmentofamoleculeoratomtoasolidsurface.Adsorptionin
2、volvesachemicalbondbetweentheadsorbedspeciesandthesurface.anisotropyVariationofatransportpropertyindifferentdirectionsinamaterial.Isoftenobtainedfromhomogenizationofregularstructures,forexample,monolithicstructuresintubularreactors.ArrheniusrateequationEx
3、pressionthatrelatestherateconstantofachemicalreactiontotheexponentialofthetemperature.batchreactorReactorcharacterizedbyitsoperation,whichmeansthatthereactordoesreachessteadystate.bipolarplateElectricallyconductingplateconnectedtotheanodeononesideandtothe
4、cathodeontheothersideinanelectrochemicalcell.BrinkmanequationsExtensionofDarcy’slawinordertoincludethetransportofmomentumthroughshearinporousmediaflow.Butler-VolmerequationExpressionthatrelatesthereactionrateofanelectrontransferreactiononanelectrodesurfac
5、etotheexponentialoftheoverpotential.TheequationcanbederivedfromtheArrheniusrateequationbyaccountingforthecontributionoftheelectricpotentialtotheactivationenergy.boundarylayerRegioninafluidclosetoasolidsurface.Thisregionischaracterizedbylargegradientsinvel
6、ocityandisoftentreatedwithapproximativemethods,becauseitisdifficulttogeometricallyresolvethelargegradientsfoundthere.chemisorptionSee adsorption.continuousreactorReactorthatoperateswithoutinterruption.Thistypeofreactorischaracterizedbyitssteady-stateopera
7、tion.diffusionlayerFictitiouslayerinafluidclosetoasolidsurfacewhereachemicalreactiontakesplace.Thefluxofspeciesperpendiculartothesurfaceinthislayerisdominatedbydiffusion.Darcy’slawEquationthatgivesthevelocityvectorasproportionaltothepressuregradient.Often
8、usedtodescribeflowinporousmedia.electroneutralityconditionConditionthatstatesthatthesumofchargesinacontrolvolumeinanelectrolyteshouldbezero.electrophoresisMigrationofchargedelectrolyteionsinanelectricfield.electroos
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