Process Calculations GATE-2012

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Common data for Q 1 & 2:

The reaction A(liq)+B(gas)\rightarrow C(liq)+D(gas) , is carried out in a reactor followed by a separator as shown below

Notation:

  • Molar flow rate of fresh B is FFB
  • Molar flow rate of A is FA
  • Molar flow rate of recycle gas is FRG
  • Mole fraction of B in recycle gas is YRB
  • Molar flow rate of purge gas is FPG
  • Molar flow rate of C is FC

Here, FFB = 2 mol/s; FA = 1 mol/s, FB/FA = 5 and A is completely converted.

Q 1: If YRB = 0.3, the ratio of recycle gas to purge gas (FRG/FPG) is





Ans is A)

Explanation:

Q 2: If the ratio of recycle gas to purge gas (FRG/FPG) is 4 then YRB is





Ans is A)

Explanation:


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