Modeling and stage-to-stage computation of multicomponent distillation processes as a multistage optimization problem

Hayatoshi Sayama, Kengo Shimizu, Yoshimasa Kameyama, Kazuhiko Suzuki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper presents a general formulation and a simulation method for multicomponent distillation processes. The design of distillation columns is formulated as a multistage optimization problem. A new iterative method is developed for generating feasible solutions and solving the necessary conditions for an extremum. The independent variables are the bottom liquid compositions. Analytical equations are used for the partial derivatives of vapor compositions with respect to liquid compositions by use of the implicit function theorem. This method can avoid the numerical difficulties that other stage-to-stage methods often present and exhibits good convergence characteristics for ten typical distillation problems in complex columns.

Original languageEnglish
Pages (from-to)413-420
Number of pages8
JournalJOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Volume23
Issue number4
DOIs
Publication statusPublished - Jan 1 1990

Keywords

  • Distillation Simulation Stage-to-Stage Computation
  • Lagrange Multiplier
  • Multistage
  • Optimization

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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