化学反应工程作业.docx
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化学反应工程作业.docx
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化学反应工程作业
TheFinalExaminationof
ChemicalReactionEngineering
Usedbygraduatestudentsof2010
2011-6
Name:
Class:
Grade:
StudentNumber:
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1:
Foragasreactionat400Ktherateisreportedas
dp2A?
3.66?
phratm/
Adt(a)Whataretheunitsoftherateconstant?
(b)Whatisthevalueoftherateconstantforthisreactionifthe
rateequationisexpressedas
dN132As.mol/mr?
?
?
kC,?
AAdtV
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2:
Fortheelementaryreactionsinseries
C?
C?
A0Akk0,att?
?
R?
?
?
S,kk?
A?
?
?
21210C?
C?
?
0RS0findthemaximumconcentrationofRandwhenitisreached.
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3:
GivenagaseousfeedT=1000K,π=5atm,C=100,C=200,,B000A0T=400K,π=4atm,C=20.FindX,X,C.
R?
A?
B5,BABA
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4:
AgaseousfeedofpureA(1mol/liter)entersamixedflowreactor
(2liters)andreactsasfollows:
2A?
R,mol2C?
0.05?
r
AAliter?
secFindwhatfeedrate(liter/min)willgiveanoutletconcentration
C=0.5mol/lliter.A
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5:
Thekineticsoftheaqueous-phasedecompositionofAis
investigatedintwomixedflowreactorsinseries,thesecondhaving
twicethevolumeofthefirstreactor.Atsteadystatewithafeed
concentrationof1molA/literandmeanresidencetimeof96secin
thefirstreactor,theconcentrationinthefirstreactoris0.5mol
A/literandinthesecondis0.25molA/liter.
Findthekineticequationforthedecomposition.
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6:
TisthedesiredproductandC=5.
A03inkmol/maofradiation,reactantAC=10ultravioletUnderA03/min)decomposesasfollows.
processstream(v=lm
Wewishtodesignareactorsetupforaspecificduty.Sketchthe
schemeselected,andcalculatethefractionoffeedtransformedinto
desiredproductaswellasthevolumeofreactorneeded.
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7:
Whenoxygenisbubbledthroughahigh-temperaturebatchof
A-containingliquidmaterial,Aoxidizesslowlytogiveaslowly
decomposingintermediateXandfinalproductR.Herearetheresultsof
anexperiment:
WehavenowayofanalyzingforX;however,wearesafeinassuming
thatatanytimeC+C+C=C.WhatcanwesayaboutthemechanismA0RAXandkineticsofthisoxidation?
Hint:
plotthedataandexaminetheplot.
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