Question

The reflux to a distillation column is \(100\text{ mole/hr}\). When the overhead product rate is \(50\text{ moles/hr}\), the reflux ratio is

• A. \(2\)
• B. \(0.5\)
• C. \(1.5\)
• D. \(0.25\)

Hint:

Reflux ratio is \(R=\frac{\text{reflux returned}}{\text{distillate withdrawn}}\).

Answer 1

The Correct Option is A

Reflux ratio is defined as: \[ R=\frac{L}{D} \] where, \[ L=\text{reflux flow rate} \] and \[ D=\text{distillate or overhead product rate} \] Given: \[ L=100\text{ mole/hr} \] \[ D=50\text{ mole/hr} \] Now: \[ R=\frac{100}{50} \] \[ R=2 \] Therefore, the reflux ratio is: \[ 2 \]