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

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

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Chemical Reaction Engineering
In case of staged packed bed reactors carrying out exothermic reaction, use

All of these
Plug flow for dilute liquid requiring no large preheating of feed
Cold shot operations for a dilute solution requiring large preheating to bring the stream upto the reaction temperature
High recycle for pure gas

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