A. The unit of space velocity is (time)-1
B. The space velocity of 3 hr-1 means that three reactor volumes of feed at specified conditions
are being fed into the reactor every hour
C. The space velocity of 3 hr-1 means that one third reactor volume of feed at specified
conditions are being fed into the reactor
D. None of these
Related Mcqs:
- A first order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is minimum, when the reactors are_____________________?
A. Equal in size
B. Of different sizes
C. Of such size that the ratio of their volumes is < 5
D. None of these - For the liquid phase zero order irreversible reaction A → B, the conversion of A in a CSTR is found to be 0.3 at a space velocity of 0.1min-1. What will be the conversion for a PFR with a space velocity of 0.2 min-1? Assume that all the other operating conditions are the same for CSTR and PFR ?
A. 0.15
B. 0.30
C. 0.60
D. 0.90 - Holding time for flow reactors is _______________ the space time, for constant fluid density ?
A. Double
B. Triple
C. Equal to
D. None of these - For identical flow rate and feed composition, X plug flow reactors (PER) in series with a total volume V gives the same conversion as single_______________?
A. CSTR of volume V
B. PFR of volume V
C. CSTR of volume V/X
D. PFR of volume V/X - 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 - 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 - ‘n’ number of plug flow reactors (P.F.R) in series with a total volume ‘V’ gives the same conversion as one P.F.R. of volume________________?
A. V/n
B. V
C. V.n
D. 1/V - Three plug flow reactors (PFR’s) of 4, 5 & 6 m3 volumes are arranged in two branches as shown below in the figure. If the total feed rate is 300 tons/hr, then for the same conversion in each branch, the feed rate through branch II should be ______________ tons/hr ?
A. 100
B. 150
C. 200
D. 225 - In flow reactors, the performance equations interrelate the rate of reaction to the___________________?
A. Feed rate
B. Reactor volume
C. Extent of reaction
D. All A., B. and C.
