The gas-phase dimerization 2A B follows an elementary rate law and takes place isothermally in...

  

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The gas-phase dimerization 2A → B follows an elementary rate law and takes place isothermally in a PBR charged with 1 kg of catalyst. The feed consists of pure A and enters the reactor at a pressure of 20 atm. The conversion exiting the PBR is 30% and the pressure at the exit 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? Assume that the pressure drop in a fluidized CSTR is negligible. (b) What would be the conversion in the PBR if the mass flow rate was decreased by a factor of 4 and the particle size was doubled? Assume that flow in the reactor remains turbulent under these conditions. The gas-phase dimerization 2A → B follows an elementary rate law and takes place isothermally in a PBR charged with 1 kg of catalyst. The feed consists of pure A and enters the reactor at a pressure of 20 atm. The conversion exiting the PBR is 30% and the pressure at the exit 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? Assume that the pressure drop in a fluidized CSTR is negligible. (b) What would be the conversion in the PBR if the mass flow rate was decreased by a factor of 4 and the particle size was doubled? Assume that flow in the reactor remains turbulent under these conditions.

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SOLUTION a In a fluidized CSTR the conversion is expected to be higher than in a PBR due to the impr... View the full answer