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Chemical Engineering - Chemical Reaction Engineering

Exercise : Chemical Reaction Engineering - Section 3
36.
The value of steric factor 'P' in the equation k = PZeE/RT usually ranges from
l.0 to 10-8
l.l.to 102
0.1 to 0.9
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
For a zero order reaction, the concentration of product increases with the
increase of reaction time.
increase in initial concentration.
total pressure.
decrease in total pressure.
Answer: Option
Explanation:
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38.
Pick out the wrong statement.
'Hold back' is defined as the fraction of material that stays longer than the mean residence time.
Study of non-ideal flow reactor is done experimentally by stimulus-response technique.
For studying a chemical reaction, it is desirable to monitor the reactants during initial stages and the products during the final stages of reaction.
A batch reactor can not be used to study the kinetics of catalytic reaction.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Effectiveness factor of a catalyst pellet is a measure of the __________ resistance.
pore diffusion
gas film
chemical reaction
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
The rate expression for a heterogenous catalytic reaction is given by, - rA = K.KA PA(1 + KA.PA + KR.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A)
E
E + ΔHA
E + ΔHA - ΔHR)
ΔHA + ΔHR
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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