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Q#1 GATE CH 2020 MCQ +1 mark -0.33 marks

In a laboratory experiment, a unit pulse input of tracer is given to an ideal plug flow reactor operating at steady state with a recycle ration, R =1. The exit age distribution E (t) , of the tracer at the outlet of the reactor is measured. The first four pulses observed at t1,t2 ,t3 , and t4 are shown below.

In addition, use the following data and assumptions

• R is defined as ratio of the volume of fluid returned to the entrance of the reactor to the volume leaving the system

• No reaction occurs in the reactor

• Ignore any dead volume in the recycle loop

If the space time of the plug flow reactor is τ seconds, which one of the following is correct?

.

.

.

.

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