The following reactions are carried out isothermally in a 50 dm3 PFR:    Additional inform...

The following reactions are carried out isothermally in a 50 dm3 PFR:

Additional information: Liquid phase

(a)  Plot the species concentrations and the conversion of A as a function of the distance (i. e., volume) clown a 50-dm3 PFR. Note any maxima.

(b) Determine the effluent concentrations and conversion from a 50-dm3 CSTR. (Ans.: CA = 0.61 , CB = 0.79, CF = 0.25, and CD = 0.45 mol/dm3.)

(c)  Plot the species concentrations and the conversion of A as a function of time when the reaction is carried out in a semibatch reactor initially containing 40 dm3 of liquid. Consider two cases: (I) A is fed to B, and (2) B is fed to A. What differences do you observe for these two cases?

(d) Vary the ratio of B to A (I<ΘB<10) in the feed to the PFR and describe what you find. What generalizations can you make from this problem?

(e)  Rework this problem for the case when the reaction is a gas-phase reaction. We will keep the constants the same so you won ' t have to make too many changes in your Polymath program, but we will make υ0 = 100 dm3/min, CTo = 0.4 mol/dm3, V = 500 dm3 and an equimolar feed of A and B. Plot the molar flow rates and SC/D and SE/F clown a PFR.

(f)  Repeat (e) when D diffuses out through the sides of a membrane reactor where the mass transfer coefficient, kCD , can be varied between 0.1 min-1 and 10 min- 1. What trends do you find?

(g) Repeat (e) when B is feel through the sides of a membrane reactor.