A. Plug flow
B. Dispersion
C. Mixed flow
D. Tank in series
Related Mcqs:
- For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of ?
A. Ideal plug flow
B. Bypass
C. Dead zone
D. Channelling - 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 single parameter model proposed for describing non-ideal flow is the ____________ model?
A. Tank in series
B. Dispersion
C. Both A. & B.
D. Neither A. nor B. - 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 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 - In a/an _____________ vessel, the fluid enters and leaves following plug flow?
A. Open
B. Closed
C. Open-closed
D. Close-opened - Holding time for flow reactors is _______________ the space time, for constant fluid density ?
A. Double
B. Triple
C. Equal to
D. None of these - Pure ethanol vapor is fed to a reactor packed with alumina catalyst, at the rate of 100 kmole / hr. The reactor products comprise: ethylene: 95 kmole / hr, water vapour: 97.5 k mole / hr and diethyl ether: 2.5 kmole/hr. The reactions occuring can be represented by: C2H5OH → C2H4 + H2O 2C2H5OH → C2H5 – O – C2H5 + H2O The percent conversion of ethanol in the reactor is________________?
A. 100
B. 97.5
C. 95
D. 2.5 - Overall rate of reaction in a heterogeneous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually ________________ the concentration of catalyst, if it does not entail a chain mechanism?
A. Proportional to
B. Independent of
C. Inversely proportional to
D. Proportional to the square of - For the non catalytic reaction of particles with surrounding fluid, the same needed to achieve the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the ________________ is the controlling resistance?
A. Film diffusion
B. Diffusion through ash layer
C. Chemical reaction
D. Either A., B. or C.
