Register Number
SATHYABAMA UNIVERSITY
(Established under section 3 of UGC Act,1956)
Course & Branch :B.Tech - P-CHEM
Title of the Paper :Chemical Reaction Engineering – I Max. Marks :80
Sub. Code :619PT403
Time : 3 Hours
Date :03/05/2011
Session :AN
______________________________________________________________________________________________________________________
1.
PART - A
(10 x 2 = 20)
Answer ALL the Questions
What are Elementary and Non-Elementary Reactions?
2.
Define Order and Molecularity of reaction.
3.
Define Space time.
4.
Define Semi – Batch reactor.
5.
What are the conclusions obtained from comparison chart for
performance of single mixed flow and Plug flow reactor for nth
order reaction?
6.
How will you arrange the following Plug flow, small Mixed and
large Mixed flow reactors for order n<1?
7.
Define Over all fractional yield.
8.
Define Selectivity for multiple reactions.
9.
Define Optimum Temperature Progression.
10. Define Heat of Reaction.
PART – B
Answer All the Questions
(5 x 12 = 60)
11. Explain the Integral method and differential method for analyzing
kinetic data.
(or)
12. Explain in detail about : (a) Arrhenius law (b) Transition state
theory.
13. Derive the performance equation for steady – State ideal Plug
flow reactor.
(or)
14. The elementary liquid – Phase reaction A+2BR with rate
1
2
equation, -rA =  rB  (12.5 liter2/mol2.min) CAC2B – (1.5min-1)
mol 
CR, 
 is to take place in a 6 liter steady state mixed flow
 liter. min 
reactor. Two feed streams, one containing 2.8 mol A/liter and the
other containing 1.6 mol B/liter, are to be introduced at equal
volumetric flow rates into the reactor, and 75% conversion of
limiting component is desired. What should be the flow rate of
each stream? Assume a constant density through out. Take K1 =
forward reaction rate constant and K2 = reverse reaction rate
constant.
15. Describe the behavior of series of “N” number of equal – Size
mixed flow reactors for first order reactions.
(or)
16. Explain the graphical procedure for finding the outlet
composition from a series of mixed flow reactors of various sizes
for reactions with negligible density change.
17. Explain the concept of Instantaneous fractional yield and Over all
fractional yield for parallel reactions taking place in plug flow
reactor and mixed flow reactor.
(or)
K1
K2
18. For the reaction in series, A  R  S derive an expression for
maximum concentration of ‘R’ and time needed to reach
maximum concentration.
19. Describe the effect of temperature on equilibrium conversion as
predicted by Thermodynamics (Pressure fixed).
(or)
20. Derive an expression for conversion in adiabatic plug flow
reactor.