CCB3043 KINETICS AND REACTOR DESIGN (January 2015)Tutorial 1

1. The irreversible gas phase non-elementary reaction, A + 2B C, is to be carried out isothermally in a constant-pressure batch reactor. The feed is at a temperature of 227oC, and pressure of 1013 kPa. The composition of the feed is 33.3% A and 66.7% B. The lab data taken under identical condition is as follows:

-rA (mol/dm3.min) x 1030.010.0050.0020.001

X0.00.20.40.6

a. Estimate the volume of plug flow reactor required for 30% conversion of A for entering volumetric flow rate of 2 m3/minb. Estimate the volume of the CSTR required to take the effluent from the plug flow reactor in part (a) to achieve the final total conversion of 50%.c. Plot the graph of reaction rate and conversion as a function of PFR volume. Comment on the graph profile that you have obtained. [P2-8, C4, C5]

2. The figure below represents a typical gas-solid catalytic exothermic reaction carried out adiabatically. Assuming that you have a fluidized CSTR and a PBR containing catalyst, suggest a suitable reactor arrangement to achieve 80% conversion using the smallest amount of catalyst. Determine the weight of catalyst required in each reactor.

[P2-12, C5]