2023年全國(guó)碩士研究生考試考研英語(yǔ)一試題真題（含答案詳解+作文范文）_第1頁(yè)
已閱讀1頁(yè)，還剩10頁(yè)未讀， 繼續(xù)免費(fèi)閱讀

下載本文檔

版權(quán)說(shuō)明：本文檔由用戶提供并上傳，收益歸屬內(nèi)容提供方，若內(nèi)容存在侵權(quán)，請(qǐng)進(jìn)行舉報(bào)或認(rèn)領(lǐng)

文檔簡(jiǎn)介

1、[4]ReactModelsfaSeriesofContinuousStirredTankReactswithaGasLiquidSolidLeachingSystem:PartI.SurfaceReactionControlV.G.PAPANGELAKISG.P.DEMOPOULOSInthisthreepartseriesofarticlescomprehensivethreephasesteadystatehydrometallu

2、rgicalreactmodelsofthecontinuousstirredtankreact(CSTR)typearedevelopedappliedtoacommercial(pressureoxidation)process.Thekeyfeaturesofthedevelopedmodelsarethecouplingofbothmassheatbalanceequationsthedeionofthenonisotherma

3、lperfmance(autothermal)ofamultistagecontinuousreactthetreatmentofmultimineralfeedmaterials.Themodelconsidersonlytheoxidationreactionsbecausetheymainlyaffectthethermalbalanceofthereact.Thestoichiometriesintrinsickiicsofth

4、eheterogeneousleachingreactionswhichareestablishedviaindependentexperimentsarethefoundationofthedevelopedmodel.Athreephase(gls)reactionprocessmightbecontrolledbyeithersurfacereactioncontroli.e.therate(s)oftheheterogeneou

5、sleachingreaction(s)bygastransfercontroli.e.therateoftransferofthegaseousreactantintotheliquidphase.Inthepresentarticle(PartI)thecaseofsurfacereactioncontrolistreated.Thearticleaddressesinparticularthefollowingtopics:(1)

6、itoutlinesthebasicmassheatbalanceequationswhichdescribetheperfmanceofamultistageleachingreact(2)itpresentsacontinuousfunctiontodescribetheparticlesizedistributionofthefeed(3)itdevelopsonthebasisofprobabilitytheynumbermas

7、sparticlesizedensityfunctionswhichgivethesizedistributionofparticlepopulationsreactingaccdingtothesurfacereactioncontrol—shrinkingcemodel.I.INTRODUCTIONTHEbasicframewkfmodelingasinglestagecontinuousstirredtankreact(CSTR)

8、fanexothermicleachingprocesswhichiskiicallycontrolledbysurfacereactionhasbeendescribedpreviously.mHereextensionismadetoacadeofcontinuousreacts.Thedevelopmentofmathematicalexpressionsismadefthegeneralcaseinvolvingthefollo

9、wingheterogeneousreaction:A(aq)bB(s)cC(aq)dD(aq)[1]ItisrecognizedthatreactantA(aq)mightbepresentintheaqueousphasebecauseofanotherheterogeneousprocessoccurringsimultaneouslywithReaction[1].FexamplereactantA(aq)mightbefmed

10、viaatransferstepfromthegastotheaqueousphase:A(g)—A(aq)[2]Throughoutthisarticle(PartI)itwillbeassumedthattherateofReaction[2]issofastthattheoverallprocessislimitedbytheheterogeneousrateofReaction[1].Thatistheprocessiscont

11、rolledbysurfacereaction.Thecaseofgastransfercontrolwillbeconsideredinacompanionarticle(PartII121).FinallythemodelequationsdevelopedinPartsIIIarebeingusedinafollowuparticle01whereaspecificthreephasesystemofchemicalV.G.PAP

12、ANGELAKISAssistantProfessiswiththeDepartmentofChemicalEngineeringAppliedChemistryUniversityofTontoTontoONMSS1A4Canada.G.P.DEMOPOULOSAssociateProfessiswiththeDepartmentofMetallurgicalEngineeringMcGillUniversityMontrealPQH

13、3A2A7Canada.ManusubmittedAugust21991.METALLURGICALTRANSACTIONSBreactionsencounteredinthepressureoxidationofmixedpyritearsenopyriteconcentratesissimulated.Theassumptionsmadepreviously111arealsovalidhereunlessotherwisestat

14、ed.Themainobjectiveremainstoassesstheperfmanceofthereactseriesindertoidentifyappropriatefeedconditionsfautogenousstablesteadystateoperationwithanacceptablefinalconversionofthesolids.Sincethereactivityofthesolidsdependson

15、theirsurfaceareaclosemonitingoftheparticlesizechangewithtimebecomesofcriticalimptance.Itisindeedtheobjectofthisarticletodeveloptheequationswhichdescribetheevolutionoftheparticlesizedistributionofsolidsreactingunderchemic

16、alreactioncontrolinareactcade.H.THEBASICMASSHEATBALANCEEQUATIONSItisassumedthatthereexistsaseriesofLCSTRsasshowninFigure1eachofarbitraryvolumeVcsTR1(1L).Theexitstreamofeachreactconstitutesthefeedtothenextone(nointerstage

17、recyclingofanykindisassumedtotakeplace).ThefollowingsteadystatemassbalanceequationcanbewrittenfthesolidphaseofReaction[1]inthethreact.—Fi—briSi=0[3]Similarlytheadiabaticheatbalanceequationfthethreactisgivenby(Fi_jCp)(T1—

18、T1_1)wherethelefthsideofEq.[4]representstherateofVOLUME23ADECEMBER1992847f?_1(d0)istheparticlesizedensity(PSD)function(basedonthemassofparticles)attheexitofthe1—1threact.TheincpationofacontinuousPSDfunction—fm(do)inEq.[1

溫馨提示

  • 1. 本站所有資源如無(wú)特殊說(shuō)明，都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請(qǐng)下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等，如果需要附件，請(qǐng)聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙，網(wǎng)頁(yè)內(nèi)容里面會(huì)有圖紙預(yù)覽，若沒(méi)有圖紙預(yù)覽就沒(méi)有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 眾賞文庫(kù)僅提供信息存儲(chǔ)空間，僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理，對(duì)用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯，并不能對(duì)任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容，請(qǐng)與我們聯(lián)系，我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對(duì)自己和他人造成任何形式的傷害或損失。

評(píng)論

0/150

提交評(píng)論