The most unsuitable reactor for carrying out reactions in which high reactant co

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Question
The most unsuitable reactor for carrying out reactions in which high reactant concentration favours high yields is
Options
A. backmix reactor
B. plug flow reactor
C. series of CSTR
D. PFR in series

Correct Answer

backmix reactor

Chemical Reaction Engineering problems

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2. Pick out the wrong statement pertaining to space velocity of flow reactors.
Options
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.

4. For high conversion in a highly exothermic solid catalysed reaction, use a __________ bed reactor.
Options
A. fixed
B. fluidised bed reactor followed by a fixed
C. fixed bed reactor followed by a fluidised
D. fluidised

6. Pick out the wrong statement.
Options
A. The vessel dispersion number (D/UL) for plug flow and mixed flow approaches zero and infinity respectively.
B. Space time in a flow reactor is a measure of its capacity and is equal to the residence time when the density of reaction mixture is constant.
C. Mixed reactor is always smaller than the plug flow reactor for all positive reaction orders for a particular duty.
D. In an ideal tubular flow reactor, mixing takes place in radial direction and there is no mixing in logitudinal direction.

8. A reactor is generally termed as an autoclave, when it is a
Options
A. high pressure batch reactor.
B. atmospheric pressure tank reactor.
C. high pressure tubular reactor.
D. atmospheric pressure CSTR.

10. Fractional conversion __________ with increase in pressure for ammonia synthesis reaction i.e., N₂ + 3H₂ ⇌ 2NH₃.
Options
A. increases
B. decreases
C. remains unchanged
D. unpredictable from the data

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