Ethanol dehydration systems consisting of a distillation column and pervaporation modules are rigorously modelled and optimised using MINLP. The optimal design and operating parameters including number of trays, feed location, reflux ratio, number of membrane sections in series and the number of membrane modules in each section are determined. A method for radically decreasing the number of equivalent structures covered in the superstructure is suggested and applied. Computational experiences with GAMS DICOPT are presented. With full structural multiplicity, the solver was not able to determine the optimal structure; but with reduced multiplicity the optimal structure has been determined. Optimal structures with and without distillation column are presented.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Computer Science Applications