Use the data in problem P8-8A for the case when heat is removed by a heat exchanger jacket...

Use the data in problem P8-8A for the case when heat is removed by a heat exchanger jacketing the reactor. The flow rate of coolant through the jacket is sufficiently high that the ambient

exchanger temperature is constant at Ta = 50 °C.

(a) (1) Plot the temperature and conversion profiles for a PBR with

where

ρb = bulk density of the catalyst (kg/m3)

a = heat-exchange area per unit volume of reactor (m2/m3)

U = overall heat-transfer coefficient (J/s • m2 • K)

(2) How would the profiles change if Ua/ρb were increased by a factor of 3000? (3) If there is a pressure drop with α = 0.019 kg”1?

(b) Repeat part (a) for both co-current and counter current flow with  an entering coolant temperature of 50 °C.

(c) Find X and T for a “fluidized” CSTR [see margin] with 80 kg of catalyst.

(d) Repeat parts (a) and (b) for W = 80.0 kg assuming a reversible reaction with a reverse specific reaction rate of

Vary the entering temperature, T0, and describe what you find.

(e) Use or modify the data in this problem to suggest another question or calculation. Explain why your question requires either critical thinking or creative thinking. See Preface B.2, B.3 and http://www.engin.umich.edu/scps.