Title

Energy efficient hybrid separation processes

Document Type

Article

Date of Original Version

12-6-2006

Abstract

Distillation accounts for a large percentage of the energy used in the manufacturing industry. As energy costs rise, hybrid separation strategies-strategies that combine one or more separation techniques with distillationare attracting attention as a means of saving energy. Examples of hybrid separation schemes include extraction followed by distillation, reactive distillation, adsorption/distillation, and others. In this work, the energy efficiency of hybrid separation schemes is studied using the novel concept of shortest separation lines. Hybrid separation of acetic acid and water using extraction/distillation is used to show that the shortest separation lines correctly define the target extract compositions for the extractor and lead to the most energy efficient hybrid separations. A global optimization strategy, which uses a mixture of feasible and infeasible subsets of constraints to avoid the discrete nature of the feasible region, is presented for directly computing the most energy efficient hybrid separation schemes. © 2006 American Chemical Society.

Publication Title

Industrial and Engineering Chemistry Research

Volume

45

Issue

25

Share

COinS