Dynamics of homogeneous azeotropic distillation columns

Andersen, Heidi Lie; Laroche, Lionel; Morari, Manfred

doi:10.1021/ie00056a026

Cited by 19 publications

(15 citation statements)

References 9 publications

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“…In the rectifying section the entrainer is removed from the top product, while in the stripping section light component is removed from the bottom product. For a more detailed discussion on the significance of different sections, we refer to the work by Andersen et al (1989). As pointed out by Andersen et al, one must be careful when making specifications in the bottom product of the extractive column as this will determine the achievable separation in the recovery column.…”

Section: Separation Sequencementioning

confidence: 99%

“…Andersen et al (1989) showed that by varying the entrainer feed flow and adjusting the other flows accordingly for a given separation, one obtains a continuous set of possible operating points. They described the set in the form of an entrainer feed/boilup relation.…”

Section: Steady-state Optimal Operationmentioning

confidence: 99%

“…NTH,Norway. and Morari, 1992), steady-state design (for example, Levy and Doherty, 1985a, b), and optimizing the separation (for example, Knight and Doherty, 1989). Only a few articles have been devoted to the control problem: Abu-Eishah and Luyben (1985), Andersen et al (1989), Anderson (1989), Bozenhardt (1988), and Gilles et al (1980). Most of them have studied specific cases, and few general conclusions are drawn.…”

Section: Introductionmentioning

confidence: 99%

“…Most of them have studied specific cases, and few general conclusions are drawn. Andersen et al (1989) presented a more general analysis, but mainly based on steady-state arguments. The most significant conclusion to draw from the articles is that homogeneous azeotropic distillation columns seem to be much more difficult to control than simple distillation columns.…”

Section: Introductionmentioning

confidence: 99%

“…As several authors have shown (Andersen et al, 1989), this degree of freedom may be used to optimize the operation in terms of entrainer and utility (heating and cooling) consumption. However, steady-state arguments indicate a much more difficult control problem at the steadystate optimal operating point than at operating points with higher utility consumption (Andersen et al, 1989). This has led some authors to concentrate also on nonoptimal operating points (Knapp and Doherty, 1990).…”

Section: Introductionmentioning

confidence: 99%

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Robust control of homogeneous azeotropic distillation columns

et al. 1991

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Section: Separation Sequencementioning

confidence: 99%

Section: Steady-state Optimal Operationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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Section: Introductionmentioning

confidence: 99%

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Robust control of homogeneous azeotropic distillation columns

et al. 1991

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Introduction

2010

Design and Control of Distillation Systems for Separating Azeotropes

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Journal review. Azeotropic distillation

Widagdo¹,

Seider²

1996

AIChE Journal

333

229

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Recent and ongoing research in the distillation of nonideal mixtures is reviewed focusing on advances in the methodologies for the synthesis, design, analysis and control of separation sequences involvinghomogeneous and heterogeneous azeotropic towers. Maps of residue curves and distillation lines are examined, as well as geometric methods for the bynthesis and design of separation sequences, trends in the steady-state and dynamic analysis of homogeneous and heterogeneous towers, the nonlinear behavior of these towers, and strategies for their control.Emphasis is placed on the methods of computing all of the azeotropes associated with a multicomponent mixture, on the features that distinguish azeotropic distillations from their zeotropic counterparts, on the potential ,for steady-state multiplicity, and on the existence of maximum and minimum reflux bounds. Important considerations in the selection of entrainers are examined. For the synthesis of separation trains, when determining the feasible product compositions, the graphical methods are clarified, especially the conditions under which distillation bounduries can be crossed and bounding strategies under finite reflux. The application of geometric theory to locate the fuced points, at minimum reflux, is reviewed in connection with homotopy-continuation algorithms for this purpose. The use of homotopy-continuation algorithms, especially for the steadystate simulation of heterogeneous azeotropic distillations, is justified. Methods for phase stability analysis are reviewed in connection with the location of real bifurcation points at phase transitions, an important feature of algorithms for the dynamic simulation of heterogeneous azeotropic distillations. Azeotropy and polyazetropyfueotrope, an ancient Greek word that translates as "to 96 January 1996 Vol. 42, No.

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Dynamics of homogeneous azeotropic distillation columns

Cited by 19 publications

References 9 publications

Robust control of homogeneous azeotropic distillation columns

Robust control of homogeneous azeotropic distillation columns

Introduction

Journal review. Azeotropic distillation

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