Passive Safety Aspects of Tubular Reactors

A reaction A—— P is to be performed in a PFR. The reaction follows first-order kinetics, and at 50 °C in the batch mode, the conversion reaches 99% in 60 seconds. Pure plug flow behavior is assumed. The flow velocity should be 1 m s 1 and the overall heat transfer coefficient 1000Wm 2 K 1. (Why is it higher than in stirred tank reactors ). The maximum temperature difference with the cooling system is 50 K. 

Reactor design calculate the required tube length and diameters required to achieve the same performance as the 5 m3 semi-batch reactor with time-cycle of 2 hours and a conversion of 99%. 

Isothermal reaction under which conditions is this strategy possible  

Slow reaction what happens with a 100 times slower reaction  

Cooling failure what happens in case of cooling failure  

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