'"~
3rd Edition. Solution Manual, Chapter 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. Pl-l.
This problem might encourage students to get in the habit of writing down what they learned from each chapter.
Pl-2.
Small open-ended question from which one could choose one or two parts. Parts (a), (b) or (e) are recommended.
Pl-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 sizing reactors in chapter 4. An alternative to PI-II and PI-12.
Pl-4.
Alternative to Pl-3, PI-II, and PI-12. SeePl-3 above.
Problems PI-5, PI-6, and PI-7 review the definitions given in the chapter.
.
Pl-S.
This problem can be assigned to just be read and not necessarily to be worked. It will give students a flavor of the top selling chemicals and top chemical companies.
Pl-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 Montgomery's equipment module on the CD-ROM. See Pl-17. Many students like this straight forward problem becausethey see how CRE principles can be applied to an everyday example. It is often assigned as an in classproblem and part (g) is usually omitted.
Problems Pl-ll and PI-12 show a bit of things to come in terms of reactor sizing. Can be rotated from year to year with PI-3 and PI-4. SeePl-3 above. Pl-13. Asks for details of operation of an industrial reactor. Pl-14. Encouragesand 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. Pl-15. Encouragesand requires using other sources to obtain information. Pl-16. Encourages using other sources to obtain information. -
. ~
Pl-17. I strongly recommend this problem be assigned. It can be used in conjunction with Problem Pl-9. Professor Susan Montgomery has done a
c
i-
~
~
p.1-1
;
.
3rd Edition. Solution Manual, Chapter 1
PI-IS.
Pl-19.
3rd Editi
great job pulling together the material on real reactors in her equipment module on the CD-ROM.
Alternat lr1
I always assign this problem so that the students will learn how to use POLYMA TH/MatLab before needing it for chemical reaction engineering problems.
pJ as
As
the
WWW
becomes
more
developed,
it
may
be more
and
lime. AI prl
more
im portant to assign this Problem.
. I
Difficult SJ
CDPl-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.
K M 0
Summar~
..
Assigned a
P1-1
Alternates
Difficul~
Iimg.
AA
2(a),2(d),2(e)
SF
15
c&d Yes
Pl-3
AA
3,4,11,12,A.
FSF
30
Yes
AA I I I
3,4,11,12,A
FSF
30
- Read Only
SF
5
3,4,11,12,A 3,4,11,12,A
FSF FSF FSF
60 30 30
.
0 0 AA AA I SIC SIC SIC
. Pl-1S PI-19
SF
45
Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Partial Partial No
SF
60
Yes
I
CDPI-A CDPI-B
AA I
No
3,4,11,12,A
FSF FSF
Assi gneg
30 30
. ==Always assigned,AA =Always assign one from the group of alternates, Often,I = Infrequently,S = Seldom,G = Graduatelevel
0
p.1-2
.Note th
Solution Civen No
Pl-2(b)
Pl-4 Pl-5 PI-6 PI-7 . PI-8 PI-9 PI-10 P1-11 PI-12 PI-13 Pl-14 Pl-15 Pl-16 Pl-17
.
~
i [ .;
~
~
, ~
t ,.
iJ
I
~ ~
.
her equipment 1m how to use on engineering
~rd Edition, Solution Manual, Chapter 1 Alternates In problems that have a dot in conjunction with AA means that one of the problem, either the problem with a dot or anyone of the alternates are always assigned. ~
lore and more
Approximate time in minutes it would take a B/B+ student to solve the problem.
Qifficult~
SF = Straight forward reinforcement of principles (plug and chug)
FSF= Fairly straight forward (requires some manipulation of equations or an
rate per reactor
intermediatecalculation).
IC = Intermediate calculation required M =More difficult
OE =Somepartsopen-ended. Solution Given No c&d Yes Yes Yes s s es Yes Yes Yes Yes Yes Yes No Partial Partial No Yes No
4:
"Note the letter problems are found on the CD-ROM. For example A = CDPI-A.
Summary Table Ch-1 Review of Definitions and Assumptions
1,5,6,7,8,9
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
f alternates,
.
p.1-3
~~
~:- ,
18 Chapter 1 EJ.:.1 No solutionwill begiven. ~ (a)
Reactants mightnotbehotenoughto react.
(b)
Plot Costvs. Volumeon log-logpaper.Usethisgraphto generate anequationfor costasa functionof volume. In (Cost) Ys. In (Volume) 13
.
12
.
i'e
11
f~I:
.
U '-"
-
c 10 9
c
io
Y =0.2901x + 9.4932
8 0
2
4
6
8
10
In (Volume) From this we generatethe equation:
Cost
PI-4
=13,270(V)°.29
We can use this equationto fmd the desiredprices:
For a 6000gallonreactor:
t
Cost=13,270(6000)°.29 =$165,400
.
For a 15,000gallonreactor: Cost=13,270(15,
V =.!Q.~~~ 0.23rom
(d)
For Constant Pressure:
ln~
L-
0.001CAo
rA=~~=~~~=~+~~ V dt V dt
.
dC rA =~+dt (e)
CA
=300.3dm3
dt
V dt
wtV.cos(wt)
Vo +VJsin(wt)
He/Shemight not be able to respondto a malfunction if he/shebecameinjured, and no one would be there to come to his/heraid.
I-Lf
I
~
I
.. !ij
