A+BC+D elementary gas phase reaction takes place at a constant temperature of 0.5 m diameter SSTR. k=1.0 dm3/mol.s and the volumetric flow rate v0=10 dm3/s. The feed consists of A and B in stoichiometric ratio. The feed concentration of A is 0.5 mol/dm3. In the reactor, the catalyst is fed at the same rate as the feed. The catalyst decay law is first order. kd=0.2 s-1.

a) Find the transformation to be obtained in a reactor at a height of 10 m. Assume that the catalyst moves in the reactor at the same speed as the gas. Draw the X-Z graph.

b) Find the transformation to be obtained in a reactor at a height of 100 m. Assume that the catalyst moves in the reactor at the same speed as the gas. Draw the X-Z graph

c) What is the activity of the catalyst at the reactor exit? Draw the a-Z graph.

d) Considering the reactor fixed and operating costs, what would be the reactor size you would choose? Why?