Question

Fenske’s Equation can be written as

(a) Nmin = S/ ln α

(b) Nmin = ln S/ ln α

(c) Nmin – 1 = ln S/ ln α

(d) Nmin + 1 = ln S/ ln α

The question was posed to me in homework.

My query is from Reflux Stage Relationships in chapter Column Process Design, Optimization and Shortcut Calculations of Distillation Design

Answer 1

Correct choice is (b) Nmin = ln S/ ln α

To explain: The Fenske’s equation is given by this equation Nmin = ln S/ ln α, where N is the number of trays and alpha is the relative volatility.