Chemical Engineering > GATE 2012 > Material Balance with Recycle
The reaction A(liq)+B(gas)→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.
If the ratio of recycle gas to purge gas (FRG/FPG) is 4 then YRB is

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.
If the ratio of recycle gas to purge gas (FRG/FPG) is 4 then YRB is
Correct : a
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