Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech PE (Petrolium Engineering) 2020 March 4th Sem Chemical Reaction Engineering I Previous Question Paper
Roll No. Total No. of Pages : 03
Total No. of Questions : 09
B.Tech.(Petroleum Refinary Engineering) (2013 Batch) (Sem.?4)
CHEMICAL REACTION ENGINEERING-I
Subject Code : BTPC-406/BTCH-405
M.Code : 72429
Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.
SECTION A
Q1. Answer briefly :
a) Define rate constant and give its units.
b) Give the physical significance of activation energy.
c) Enumerate the various methods for analyzing the kinetic data.
d) Give the advantages and disadvantages of batch reactor.
e) Differentiate between elementary and non-elementary reaction.
f) Differentiate between conversion and yield.
g) Draw graph between concentration and time for autocatalytic reaction.
h) Give the significance of RTD.
i) What is the effect of temperature on equilibrium conversion ?
j) The half life of a first order reaction A ? B is 10min. Find the conversion after
50min.
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1 | M-72429 (S2)-1867
Roll No. Total No. of Pages : 03
Total No. of Questions : 09
B.Tech.(Petroleum Refinary Engineering) (2013 Batch) (Sem.?4)
CHEMICAL REACTION ENGINEERING-I
Subject Code : BTPC-406/BTCH-405
M.Code : 72429
Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.
SECTION A
Q1. Answer briefly :
a) Define rate constant and give its units.
b) Give the physical significance of activation energy.
c) Enumerate the various methods for analyzing the kinetic data.
d) Give the advantages and disadvantages of batch reactor.
e) Differentiate between elementary and non-elementary reaction.
f) Differentiate between conversion and yield.
g) Draw graph between concentration and time for autocatalytic reaction.
h) Give the significance of RTD.
i) What is the effect of temperature on equilibrium conversion ?
j) The half life of a first order reaction A ? B is 10min. Find the conversion after
50min.
2 | M-72429 (S2)-1867
SECTION-B
2. The following data has been obtained for an irreversible reaction A ?B carried out in a
constant volume batch reactor. Find the reaction order and the reaction rate constant.
Time, t(min) 0 5 10 15 20
Concentration of A, C
A
(mol/lit) 4.0 2.33 1.1 0.33 0.01
3. Derive the performance equation for a batch reactor for constant density first order
system. Show it graphically.
4. 50% conversion for a homogeneous liquid phase reaction
2
A A
A B; C
k
r k ? ? ? ? takes
place in a CSTR. Find the conversion if this reactor is replaced with another having
volume 4 times that of original reactor. All the other process conditions remain the same.
5. From steady state kinetic runs in a mixed flow reactor, the following data is obtained for
the liquid phase homogeneous reaction. Find the space time needed to treat a feed of C
A0
= 100 mol/m
3
to 90% conversion in a plug flow reactor.
Time, sec 60 35 11 20 11
C
A0
, mol/m
3
50 100 100 200 200
C
A
,mol/m
3
20 40 60 80 100
6. 80% conversion is achieved in a single CSTR wherein 1
st
order reaction is carried out.
Find out how the addition of another similar CSTR in series with the first one will affect
conversion of reactant ?
SECTION-C
7. a) Define E, C and F curve. Give interrelationship between them.
b) Following data has been obtained when a tracer was injected as a pulse into a reactor.
T,min 0 1 2 3 4 5 6 7 8 9 10 12 14
C
pulse,
gm/L 0 2 5 8 10 8 6 4 3 2.5 1.2 0.3 0
Construct an E curve. Determine the fraction of material leaving the reactor that has spent
time inside the reactor between 3 & 5 min.
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1 | M-72429 (S2)-1867
Roll No. Total No. of Pages : 03
Total No. of Questions : 09
B.Tech.(Petroleum Refinary Engineering) (2013 Batch) (Sem.?4)
CHEMICAL REACTION ENGINEERING-I
Subject Code : BTPC-406/BTCH-405
M.Code : 72429
Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.
SECTION A
Q1. Answer briefly :
a) Define rate constant and give its units.
b) Give the physical significance of activation energy.
c) Enumerate the various methods for analyzing the kinetic data.
d) Give the advantages and disadvantages of batch reactor.
e) Differentiate between elementary and non-elementary reaction.
f) Differentiate between conversion and yield.
g) Draw graph between concentration and time for autocatalytic reaction.
h) Give the significance of RTD.
i) What is the effect of temperature on equilibrium conversion ?
j) The half life of a first order reaction A ? B is 10min. Find the conversion after
50min.
2 | M-72429 (S2)-1867
SECTION-B
2. The following data has been obtained for an irreversible reaction A ?B carried out in a
constant volume batch reactor. Find the reaction order and the reaction rate constant.
Time, t(min) 0 5 10 15 20
Concentration of A, C
A
(mol/lit) 4.0 2.33 1.1 0.33 0.01
3. Derive the performance equation for a batch reactor for constant density first order
system. Show it graphically.
4. 50% conversion for a homogeneous liquid phase reaction
2
A A
A B; C
k
r k ? ? ? ? takes
place in a CSTR. Find the conversion if this reactor is replaced with another having
volume 4 times that of original reactor. All the other process conditions remain the same.
5. From steady state kinetic runs in a mixed flow reactor, the following data is obtained for
the liquid phase homogeneous reaction. Find the space time needed to treat a feed of C
A0
= 100 mol/m
3
to 90% conversion in a plug flow reactor.
Time, sec 60 35 11 20 11
C
A0
, mol/m
3
50 100 100 200 200
C
A
,mol/m
3
20 40 60 80 100
6. 80% conversion is achieved in a single CSTR wherein 1
st
order reaction is carried out.
Find out how the addition of another similar CSTR in series with the first one will affect
conversion of reactant ?
SECTION-C
7. a) Define E, C and F curve. Give interrelationship between them.
b) Following data has been obtained when a tracer was injected as a pulse into a reactor.
T,min 0 1 2 3 4 5 6 7 8 9 10 12 14
C
pulse,
gm/L 0 2 5 8 10 8 6 4 3 2.5 1.2 0.3 0
Construct an E curve. Determine the fraction of material leaving the reactor that has spent
time inside the reactor between 3 & 5 min.
3 | M-72429 (S2)-1867
8. For the irreversible first order series reaction ;
1 2
A R S
k k
? ? ? ? in a CSTR. Find an
expression to calculate i) the time for achieving maximum concentration of R
ii) Maximum concentration of R.
9. An elementary irreversible liquid-phase reaction A + B ? C is carried out in a CSTR.
The molar flow rate of A and B fed to the reactor at a temperature of 300K are 1.25
mol/sec and 1 mol/sec respectively. The reactor is jacketed and the jacket temperature is
maintained at 310 K. An agitator contributes a work of 20.9 kW to the reactor. The
volumetric flow rate is 5 Lit/sec. Determine the volume of the reactor for 50% conversion
of A. Given that
40 50 60
; ; ;
pA pB pC
cal cal kcal
C C C
molK molK mol
? ? ? ? ?
0.01
(300 ) ; 8 ;
.Sec
lit kcal
k K E
mol mol
? ?
? ? ?
20 25
(298 ) ; (298 ) ; (298 ); . 75
sec.
A B C
kcal kcal cal
H K H K H K U A
mol mol K
? ? ? ? ?
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 21 March 2020