Related Questions

Recycling back of outlet stream to the reactor from an ideal CSTR carrying out a first order liquid phase reaction will result in __________ in conversion.
A Decrease
B Increase
C No change
D Either A or B, depends on the type of reaction
An irreversible first order reaction is being carried out in a CSTR and PFR of same volume. The liquid flow rates are same. The relative conversion will
A Be more in CSTR than in PFR
B Be more in PFR than in CSTR
C Be same in both cases
D Depend on the temperature
For identical flow rate, feed composition and for elementary first order reactions, 'N' equal sized mixed reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for constant density systems. This is true, when the value of 'N' is
A 1
B >1
C ∞
D ≥1
The conversion of a reactant, undergoing a first order reaction, at a time equal to three times the half life of the reaction is
A 0.875
B 0.5
C 0.425
D Data insufficient to calculate
Temperature control of an exothermic chemical reaction taking place in a CSTR is done with the help of cooling water flowing in a jacket around the reactor. The types of valve and controller action to be recommended are
A Air to open valve with the controller direct acting
B Air to close valve with the controller indirect acting
C Air to open valve with the controller indirect acting
D Air to close valve with the controller direct acting
What is the dispersion number for a CSTR?
A 0
B 1
C ∞
For an ideal mixed flow reactor (CSTR), the exit age distribution E(t) is given by
A A dirac delta function
B A step function
C A ramp function
D None of the above
In a CSTR __________ varies with time.
A Reaction rate
B Concentration
C Both A & B
D Neither A nor B
The residence time distribution of an ideal CSTR is
A 1/τ exp (-t/τ)
B Τ exp (-t/τ)
C Exp(-t/τ)
D 1/τ (-t/τ)
The performance of a cascade of CSTR's can be improved by adding
A A P.F. reactor in series
B A P.F. reactor in parallel
C More CSTR's in series
D More CSTR's in parallel

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