Chemical Reaction Engineering
A first order reaction requires two equal sized CSTR. The conversion is

Less when they are connected in series
Same whether they are connected in series or in parallel
More when they are connected in parallel
More when they are connected in series

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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

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

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