Optimization of Continuous Extraction Column and Solvent Selection Using Differential Evolution Technique

Abstract

This paper presents the solvent selection and optimal design of continuous liquid–liquid extraction column by differential evolution algorithm, a global optimization technique. The multi-component and multi-stage extraction column is simulated using equilibrium based method. Differential evolution technique is combined with column model and liquid–liquid equilibria model. A general case of extraction of acetic acid from water is explored when three solvent are available. The decision variables chosen are the solvent, number of stages and solvent flow-rate. The objective function is minimization of total annualized cost of column while selecting best solvent from cost perspective. © 2013, The Institution of Engineers (India).