A. Tank in series
B. Dispersion
C. Both A. & B.
D. Neither A. nor B.
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Related Mcqs:
- A pollutant P degrades according to first order kinetics. An aqueous stream containing P at 2 kmole/m3 and volumetric flow rate 1m3 /h requires a mixed flow reactor of volume V to bring down the pollutant level to 0.5 kmole/m3. The inlet concentration of the pollutant is now doubled and the volumetric flow rate is tripled. If the pollutant level is to be brought down to the same level of 0.5 k.mole/m3, the volume of the mixed flow reactor should be increased by a factor of_______________?
A. 7
B. 6
C. 3
D. 7/3 - The exit age distribution of a fluid leaving a vessel (denoted by E) is used to study the extent of non-ideal flow in the vessel. The value of ∫∞ 0 E.dt is____________________?
A. 0
B. 1
C. ∞
D. √2π - Signal normally used to study non-ideal flow by stimulus response technique is _______________ input?
A. Pulse
B. Step
C. Both A. & B.
D. Neither A. nor B. - 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 - ‘N’ plug flow reactors in series with a total volume ‘V’ gives the same conversion as a single plug flow reactor of volume ‘V’ for _______________ order reactions?
A. First
B. Second
C. Third
D. Any - The ‘E’ curve for a non-ideal reactor defines the fraction of fluid having age between t and t + dt _____________________?
A. At the inlet
B. At the outlet
C. In the reactor
D. Averaged over the inlet and outlet - Non-catalytic fluid-solid reactions are represented by _______________ model?
A. Continuous reaction
B. Unreacted core
C. Both A. and B.
D. Neither A. and B. - The following gas phase reaction is taking place in a plug flow reactor. A stoichiometric mixture of A and B at 300 K is fed to the reactor. At 1 m along the length of the reactor, the temperature is 360 K. The pressure drop is negligible and an ideal gas behaviour can be assumed. Identify the correct expression relating the concentration of A at the inlet (CA0), concentration of A at 1m (CA) and the corresponding conversion of A (X) ?
A. CA = 1.2 CA0 (1 – X)/(1 – 0.33X)
B. CA = 1.2 CA0 (1 – X)/(1 – 0.5X)
C. CA = 0.83 CA0 (1 – X)/(1 – 0.33X)
D. CA = 0.83 CA0 (1 – X)/(1 – 0.5X) - 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 - For an ideal plug flow reactor, the value of Peclet number is_______________?
A. 0
B. 1
C. 10
D. ∞
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