Question
Mass Transfer Question on Design and operation of equipment for distillation
A simple distillation column separates a binary mixture of A and B. The relative volatility of A with respect to B is 2. The steady-state composition of A in the vapour leaving the 1st, 2nd and 3rd trays in the rectifying section are 94, 90 and 85 mol%, respectively. For ideal trays and constant molal overflow, the reflux-to-distillate ratio is
A
1.9
B
2.7
C
1.2
D
1.1
Answer
2.7
Explanation
Solution
The correct option is (B) :2.7