2 replies to this topic

[kvdheeraj]

brothers can you pls! help me out with the solution for this problem?
i ill be grateful for your replies.




The liquid reaction A + 2B ! C is to be carried out continuously to produce 20 x 106 lb
of C/yr. Separate feeds of A and B will be fed to one or more CSTR’s to achieve a 95%
conversion of A. Recovery of C in downstream purification is expected to be 97%.
The following data has been collected:

1. Laboratory batch experiments with mixtures of A & B resulted in the following
rate expression: r (gmoles/liter/hr) = 1.8CA
1/3CB @ 200°F, CA, CB in gmoles/liter.
MWA = 50, MWB = 75.

2. The reaction is exothermic with "Hr @ 200°F = -8,000 cal/gmole A converted.

3. Density of all compounds is 1.08 gm/cm3 at 200°F.

4. Thermal conductivity of all compounds is 0.08 Btu/hr/ft/°F. Viscosity of A is 1.0
cp, B 1.5 cp, and the viscosity of C = exp(0.6057+4474/T) cp, T in °R.

5. Cooling water is available at 90°F.

6. Cost of available stainless steel jacketed reactors, installed is as follows:
Reactor Volume (gal) Installed Cost
300 $80,000
500 $110,000
1,000 $150,000
5,000 $336,000
10,000 $474,000


7. Compounds A and B are fed at 60°F. The molar ratio of B/A in the feed is 2.15.
Assume the heat capacity Cp = 0.6 Btu/lb/°F for all components.



To Do:
1. Design a system of one or more jacketed CSTR’s at 200°F which gives the
desired production rate of C for the minimum reactor capital cost. Assume the
reactor is filled to no more than 85% of maximum capacity. If more than one
CSTR is required, assume identical size and design for this problem.


2. Draw a sketch of the reactor and indicate jacket heat transfer medium
requirements (flow rate, temperature). Neglect the jacket side heat transfer
coefficient.


3. Assuming the reactor vessel will be cylindrical with the “standard configuration.”
Indicate power and impeller speed required for agitation.

Attached Files

•  Proj_2.pdf   58.81KB   42 downloads

[Art Montemayor]

Are you a Chemical Engineering Student?

If so, this thread - and the one previous to this one as well - belongs in the Student Forum and not here in the Industrial Professional Forum.

Also, if you are a Student and really need help, then fill in all the information on your registration form. We need to know your background, level of study, age, university, and any other background information that enables us to better reply to your question(s).

If you do not reply to this, I will proceed to move these threads to the Student Forum.

Thank you.

[kvdheeraj]

dear,
MR.Art montemayor

i have written a personal mail to your message box, describing my state of position.may be you dint go through the mail. i am really striving to get the solution. i ill be grateful to you if you could help me out. expecting a reply from you.

i ill be thankful for your consideration and time

kvdheeraj