Download GTU BE/B.Tech 2019 Summer 7th Sem Old 170501 Chemical Reaction Engineering I Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 7th Sem Old 170501 Chemical Reaction Engineering I Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VII (OLD) EXAMINATION ? SUMMER 2019
Subject Code: 170501 Date: 18/05/2019

Subject Name:Chemical Reaction Engineering - I

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

Q.1 (a) An irreversible elementary series reaction A + B ? C is taking place in a constant
volume batch reactor with rate expression ?rA = kCACB. Derive an expression to
determine kinetics of this reaction.
07
(b) Explain the temperature dependency term in the rate equation using Arrhenius
theory.
07

Q.2 (a) Define autocatalytic reactions. Derive an expression to find its kinetics. Explain
plots of rate of reaction Vs. time and concentration Vs. time
07
(b) Derive the integrated rate expression for first order reversible reactions. 07
OR
(b) Find the first order rate constant for the disappearance of A in the gas phase reaction
2A ? R. if on holding the pressure constant, the volume of the reaction mixture
starting with 80 % of A decreases by 20% in 3 minutes.
07

Q.3 (a) Derive the performance equation of ideal Plug flow reactor. 07
(b) The decomposition of sulfurile chloride to sulfur dioxide and chlorine is carried
out in closed vessel (Batch reactor) for 60 minutes at 610 0F. Calculate the time
required to decompose 95% of sulfurile chloride, when the reaction proceeds
according to first order reaction and the reverse reaction is negligible. The
specific reaction rate constant at 610 0F is 0.00132 per minute
07
OR
Q.3 (a) Define recycle ratio. Derive the design equation of Recycle reactor. 07
(b) Derive the design equation of Ideal batch Reactor. 07

Q.4 (a) Write short notes on the qualitative discussion about product distribution for
parallel reaction.
07
(b) Write short note on half life method to determine kinetics. 07
OR
Q.4 (a) A two liquid reactant stream with C Ao = 1 mol/L passing through two mixed flow
reactors in series. The concentration of A in the exit stream from the first reactor is
0.5 mol/L. Find the concentration of A in the exit stream of the second reactor. The
reaction A ? R follows second order kinetics and V2/V1 = 2.
07
(b) Show how rate constants are evaluated for irreversible reactions in parallel. 07

Q.5 (a) Define and explain the following terms.
i) Order of reaction (ii) Elementary and non-elementary reactions
iii) Activation Energy iv) Single and multiple reactions. v) Space time
(vi) Space velocity vii) molecularity
07
(b) Write short note on quantitative product distribution for series reaction. 07
OR
Q.5 (a) Write a short note on optimum temperature progression. 07
(b) Explain various contacting patterns to get favorable distribution of products for
multiple reactions.
07

FirstRanker.com - FirstRanker's Choice