2. The elementary liquid-phase reaction A + B (reversible) C is to be carried ou

Question

2. The elementary liquid-phase reaction

A + B (reversible) C

is to be carried out adiabatically in a set of tubular reactors packed with a resin catalyst and arranged in series. The feed consists of 25 mol% A, 25 mol% B, and 50 mol% inerts at 300 K. There are available to you a large number of interstage heat exchangers that can cool the reaction stream to temperatures as low as 300 K. The reactors have sufficient catalyst to reach 95 % of the corresponding equilibrium conversion.

(a) What is the smallest number of reactors in series necessary to obtain an exiting conversion above 50 % ?

(b) What would you need to do to increase the conversion to 95 %?

(c) What concerns would you have about reaching to 95 % conversion?

Additional information:

CPA = 2.0 cal/g mol, °C CPC = 7.0 cal/g mol· °C

CpB = 5.0 cal/g mol, °C CP1 = 1.5 callg mol, °C

deltaHRXN(273 K) = -10,000 call g mol A

F AO = 10 mol/min

Explanation / Answer

A catalyst canspeed up the reaction rate and the reactors should be cool

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