The gas-phase dimerization
2A → B
follows an elementary rate law and takes place isothermally in a PBR charged with 1.0 kg of catalyst. The feed, consisting of pure A, enters the PBR at a pressure of 20 atm. The conversion exiting the PBR is 0.3, and the pressure at the exit of the PBR is 5 atm.
(a) If the PBR were replaced by a “fluidized” CSTR with 1 kg of catalyst, what will be the conversion at the exit of the CSTR? You may assume that there is no pressure drop in the CSTR.
(b) What would be the conversion in the PBR if the mass flow rate were decreased by a factor of 4 and particle size were doubled? Assume turbulent flow. (Final exam)
(c) Discuss what you learned from this problem as well as the strengths and weaknesses of using this as a final exam problem.
(d) Write a question on critical thinking and explain why it involves critical thinking.
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