Dynamics and control of a heterogeneous azeotropic distillation column: Conventional control approach

I. L. Chien; C. J. Wang; D. S.H. Wong

doi:10.1021/ie980269f

Dynamics and control of a heterogeneous azeotropic distillation column: Conventional control approach

I. L. Chien^*
, C. J. Wang
, D. S.H. Wong

^*Corresponding author for this work

Research output: Contribution to journal › Journal Article › peer-review

62 Scopus citations

Abstract

In this work, bifurcation analysis and dynamic simulation were used to investigate the optimum conventional control strategy of an isopropyl alcohol (IPA), cyclohexane (CyH), and water (H₂O) heterogeneous azeotropic column. Steady-state process analysis shows that the optimal operation point should be located at a critical reflux, a transition point at which the distillation path switches from a route that passes through the IPA + H₂O azeotrope to one that passes through the IPA + CyH azeotrope. A good control strategy must be able to maintain a steady column temperature profile that shows a plateau near 70 °C to ensure passage around the IPA + CyH azeotrope. An inverse double-loop control strategy is proposed based on principal component analysis. This scheme is capable of maintaining the desired column temperature profile given all kinds of feed disturbances, thus keeping the product IPA purity at the desired level.

Original language	English
Pages (from-to)	468-478
Number of pages	11
Journal	Industrial and Engineering Chemistry Research
Volume	38
Issue number	2
DOIs	https://doi.org/10.1021/ie980269f
State	Published - 1999
Externally published	Yes

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title = "Dynamics and control of a heterogeneous azeotropic distillation column: Conventional control approach",

abstract = "In this work, bifurcation analysis and dynamic simulation were used to investigate the optimum conventional control strategy of an isopropyl alcohol (IPA), cyclohexane (CyH), and water (H2O) heterogeneous azeotropic column. Steady-state process analysis shows that the optimal operation point should be located at a critical reflux, a transition point at which the distillation path switches from a route that passes through the IPA + H2O azeotrope to one that passes through the IPA + CyH azeotrope. A good control strategy must be able to maintain a steady column temperature profile that shows a plateau near 70 °C to ensure passage around the IPA + CyH azeotrope. An inverse double-loop control strategy is proposed based on principal component analysis. This scheme is capable of maintaining the desired column temperature profile given all kinds of feed disturbances, thus keeping the product IPA purity at the desired level.",

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year = "1999",

doi = "10.1021/ie980269f",

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TY - JOUR

T1 - Dynamics and control of a heterogeneous azeotropic distillation column

T2 - Conventional control approach

AU - Chien, I. L.

AU - Wang, C. J.

AU - Wong, D. S.H.

PY - 1999

Y1 - 1999

N2 - In this work, bifurcation analysis and dynamic simulation were used to investigate the optimum conventional control strategy of an isopropyl alcohol (IPA), cyclohexane (CyH), and water (H2O) heterogeneous azeotropic column. Steady-state process analysis shows that the optimal operation point should be located at a critical reflux, a transition point at which the distillation path switches from a route that passes through the IPA + H2O azeotrope to one that passes through the IPA + CyH azeotrope. A good control strategy must be able to maintain a steady column temperature profile that shows a plateau near 70 °C to ensure passage around the IPA + CyH azeotrope. An inverse double-loop control strategy is proposed based on principal component analysis. This scheme is capable of maintaining the desired column temperature profile given all kinds of feed disturbances, thus keeping the product IPA purity at the desired level.

AB - In this work, bifurcation analysis and dynamic simulation were used to investigate the optimum conventional control strategy of an isopropyl alcohol (IPA), cyclohexane (CyH), and water (H2O) heterogeneous azeotropic column. Steady-state process analysis shows that the optimal operation point should be located at a critical reflux, a transition point at which the distillation path switches from a route that passes through the IPA + H2O azeotrope to one that passes through the IPA + CyH azeotrope. A good control strategy must be able to maintain a steady column temperature profile that shows a plateau near 70 °C to ensure passage around the IPA + CyH azeotrope. An inverse double-loop control strategy is proposed based on principal component analysis. This scheme is capable of maintaining the desired column temperature profile given all kinds of feed disturbances, thus keeping the product IPA purity at the desired level.

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U2 - 10.1021/ie980269f

DO - 10.1021/ie980269f

M3 - 文章

AN - SCOPUS:0033083351

SN - 0888-5885

VL - 38

SP - 468

EP - 478

JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

IS - 2

ER -

Dynamics and control of a heterogeneous azeotropic distillation column: Conventional control approach

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