ElementsofChemicalReactionEngineering-SolutionsManual3ed-Fogler.PDF
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1、SOLUTIONS MANUAL Elements.of Chemical Reaction Engineering THIRD EDITION by Timothy Hubbard,Jessica Hamman,and David Johnson with Kylas Subramanian,Sumate Charoenchaidet,Probjot Singh,John Santini,H.Scott Fogler,Lisa Ingalls,Abe Sendijarevic,and Nicholas Abu-Absi 3rd Edition,Solution Manual,Chapter
2、1 Chapter 1 General:The goal of these problems are to reinforce the definitions and provide an understanding of the mole balances of the different types of reactors.It lays the foundation for step 1 of the algorithm in Chapter 4.PI-1.This problem might encourage students to get in the habit of writi
3、ng down what they learned from each chapter.PI-2.Small open-ended question from which one could choose one or two parts.Parts(a),(b)or(e)are recommended.PI-3.This problem use Example 1-3 to calculate a CSTR volume.It is straight forward and gives the student an idea of things to come in terms of siz
4、ing reactors in chapter 4.An alternative to PI-11 and PI-12.PI-4.Alternative to PI-3,PI-11,and PI-12.See PI-3 above.Problems PI-5,PI-6,and PI-7 review the definitions given in the chapter.PI-8.This problem can be assigned to just be read and not riecessarily to be worked.It will give students a flav
5、or of the top seljing chemicals and top chemical companies.PI-9.This problem will be useful when the table is completed and the students can refer back to it in later chapters.Answers to this problem can be found on Professor Susan Montgomerys equipment module on the CD-ROM.See Pl-17.PI-10.Many stud
6、ents like this straight forward problem because they see how CRE prinaples can be applied to an everyday example.It is often assigned as an in class problem and part(g)is usually omitted.Problems PI-11 and PI-12 show a bit of things to come in terms of reactor sizing.Can be rotated from year to year
7、 with PI-3 and PI-4.See PI-3 above.m-13.Asks for details of operation of an industrial reactor.PI-14.Encourages and requires the student to go outside the text for information related to CRE.May be a bit early in the text to assign this problem.PI-15.Encourages and requires using other sources to ob
8、tain information.PI-16.Encourages using other sources to obtain information.m-17.I strongly recommend this problem be assigned.It can be used in conjunction with Problem PI-9.Professor Susan Montgomery has done a 3rd Edition,Solution Manual,Chapter 1 great job pulling together the material on real r
9、eactors in her equipment module on the CD-ROM.PI-18.I always assign this problem so that the students will learn how to use POLYMATH/MatLab before needing it for chemical reaction engineering problems.PI-19.As the WWW becomes more developed,it may be more and more important to assign this problem.CD
10、P1-A Similar to problems 3,4,11,and 12.CDPl-B Points out difference in rate per unit liquid volume and rate per reactor volume.Summary PI-1 PI-2)PI-3 PI-4 PI-5 P1-6 PI-7 PI-8 PI-9 PI-10 PI-1 1 PI-12 PI-13 PI-14 PI-15 PI-16 PI-17 a PI-18 PI-19 CDPl-A CDPI-B Assigned 0 Alternates-Read Only Difficulty
11、SF FSF FSF FSF FSF FSF FSF FSF Time-Solution Given No c&d Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Partial Partial No Yes No Assi-med=Always assigned,AA=Always assign one from the group of alternates,0=Often,I=Infrequently,S=Seldom,G=Graduate level 3rd Edition,Solution Manual,Chapter 1 Alt
12、ernates In problems that have a dot in conjunction with AA means that one of the problem,either the problem with a dot or any one of the alternates are always assigned.Time Approximate time in minutes it would take a B/B+student to solve the problem.Difficultv SF=Straight forward reinforcement of pr
13、inciples(plug and chug)FSF=Fairly straight forward(requires some manipulation of equations or an intermediate calculation).IC=Intermediate calculation required M=More difficult OE=Some parts open-ended.*o t e the letter problems are found on the CD-ROM.For example A=CDP1-A.Summary Table Ch-1 Review
14、of Definitions and 1,5,6,7,8,9 Assumptions Introduction to the CD-ROM 17,18,A Make a calculation 10,11,12,13 Open-ended 14,15,16 Straight forward 2(b)3,13 Fairly straight forward 4,11,12,B More difficult 10 Chapter 1 P1-l No solution will be given.p1-2(a)Reactants might not be hot enough to react.(b
15、)Plot Cost vs.Volume on log-log paper.Use this graph to generate an equation for cost as a function of volume.In(Cost)vs.In(Volume)13 8 0 2 4 6 8 In(Volume)From this we generate the equation:Cost=13,270(V)O.We can use this equation to find the desired prices:For a 6000 gallon reactor:Cost=13,270(600
16、0)=$165,400 For a 15,000 gallon reactor:Cost=13,270(15,000)=$21 5,740 10 dm3/min C,(c)V=300.3dm3 0.23 min O.OOlC,(d)For Constant Pressure:(e)He/She might not be able to respond to a malfunction if he/she became injured,and no one would be there to come to hidher aid.w.For C S n.equation(31-3)is rr;o
17、so-rA=LC*F A-C v A So the first equation bacoea 3 given that CA 0.1 CAO,Y-10 dm/ah and k-0.23/oin.d The Cm i s 4 times lartot than tho plug flow reactor for thaab canditions.Solution Pl-4 Reaction:A-B Problem:Determine time to reduce the number of moles of A to 1%of its initial va1u.e.Mole Balance:(
18、constant volume,batch reactor)Rate Law.(fisi order)N.-r,=kc,where k=23/min and C,=T N.Therefore,-rA=k-v Combine:dN 2-d L -m,(Solution by J.T.Santini Jr.)a)The asswnNons made in deriving I&design e q d o n for a batch eta rrr:-closed system:no s u c w anying m u e m a luve the rwcux-no spatial vYiuio
19、n in system proparia b)The assumptions made in deriving rhe d u i p eqwion for a CSIR.a r c:-steady state-no spatial variation in comn111uo11.ampurnuc.or reaction rue thmugh Ihc vessel.C)The+rrumpcim mde in deriving Ihc design equation for a plug-flow rucror are:-steady slue-no radii variation ia pm
20、pcnia of rynan d)The lrsumptions made in deriving the design e q d o n for a packed-bad-tor ut:-steady m e -no ndid miation in propaties of system,e)-rAV is rhc rut of d i w p p u w e of spaies A per unit mass o r ma)of atslyst=moks 1(time-mau caulyu).r is the rue of fomuuon of species A per unit ma
21、ss(or area)of curlyst=moles I(rimccrulyst).-r is an intensiq quuui,in that it is a function of thc conantmion,ternperuuh prcsurc.and h e type o f a d y s (if my).md u defined u my pPiLU within rhc reactor.An extensive qumlity i s r property which k o b-by summing up chc propuria of individual nrbsys
22、tems within I h c u system;in this sense,-r u independent of lhc urcnt of Ihc system General Mole Balance:For a CSTR,then is no accumulation.Also,assume weU mixed,so that there is no spatial variation in the reactor.The mole balauce simplifies to:O=Fp-Fj+tjV The rate of reaction based on volume is r
23、elated to the rate of reaction based on catalyst weight by the bulk catalyst density pb.The reactor volume and catalyst weight are also related by a similar cquarion.-rj=Pb(-r;)w=vp,Combining and rearranging the last three equations gives the equation for a fluidized CSTR:Fp-F,w=-rj(Solution by J.T.
24、Santini.Jr.)-.Sole balance or species j i s:l e t M-mol.t.of r?acias j f(mole.)(mass)Thou F Y.-Jo J-1-I-mass flow rate of 3 into tho reactor;(tire)(mnle)N 1 1 mass)-n4 1-1(01e.s)&m=ass oc species j tho zeaetor and noting that Xj i s coastant:Or.upon s n b s t i t o t i o into Eqn.(1-4.)PI-8.-NO solu
25、tion will be given.rreaenr Slrnpel Batch Reaclor Is charged vla IW holes 1.Gas phase 1.Small scale producllon 1.Hlgh convenlon par m U volume I.Hlgh operallng cosl In!he lop ol Iha tmk;rrhlle m a d h 2.Llquld ere 2.Inlarmuilale or one h o n,p a u 2.Product qullily Is carded oul,nolhln else Is pul In
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