Chemical Reaction Engineering
A back mix reactor is

Same as ideal stirred tank reactor
Suitable for gas phase reactions
Same as plug flow reactor (PFR)
Ideal at very low conversion

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Chemical Reaction Engineering
A trickle bed reactor is the one, which

Processes three reactants with same flow rate
Processes three reactants at different flow rates
Employs all the three phases (i.e.. .solid, liquid and gas)
Has altogether three streams either entering or leaving

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Chemical Reaction Engineering
For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is

Desorption of C
Surface Kc/(1 + TS) reaction between absorbed A and B in the gas phase
Surface reaction between absorbed A and absorbed B
Surface reaction between A in the gas phase and absorbed B

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Chemical Reaction Engineering
A space velocity of 5 hr⁻¹ means that

A fixed conversion of a given batch of feed takes 5 hours
After every 5 hours, reactor is being filled with the feed
Cent per cent conversion can be achieved in at least 5 hours
Five reactor volumes of feed (at specified conditions) are being fed into the reactor per hour

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Chemical Reaction Engineering
In an ideal mixed reactor (at steady state), the

Composition throughout the reactor remains same
All of these
Space time is equivalent to holding time for constant density systems
Exit stream has the same composition as the fluid within the reactor

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