Analysis of dynamic properties of alternative sequences to the Petlyuk column

The Petlyuk distillation configuration has received considerable attention because of its efficiency to reduce the energy required for the separation of ternary mixtures. The structure of the Petlyuk system offers some control challenges arising from the transfer of vapor streams back and forth betw...

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Bibliographic Details
Published inComputers & chemical engineering Vol. 29; no. 6; pp. 1389 - 1399
Main Authors Segovia-Hernández, Juan Gabriel, Hernández, Salvador, Jiménez, Arturo
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 15.05.2005
Subjects
Distillation control
Petlyuk column
Thermally coupled distillation
Petlyuk column
Distillation control
Thermally coupled distillation
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Summary:The Petlyuk distillation configuration has received considerable attention because of its efficiency to reduce the energy required for the separation of ternary mixtures. The structure of the Petlyuk system offers some control challenges arising from the transfer of vapor streams back and forth between the columns. This means that neither of the columns can have a uniform lower nor higher pressure. Recently, some alternate Petlyuk-like schemes that might provide better operational properties than the Petlyuk column have been proposed. In this work, we analyze the control properties of six alternative thermally coupled distillation schemes to the Petlyuk system. The theoretical control properties are analyzed with the application of the singular value decomposition technique. Rigorous closed loop simulations are used to supplement the theoretical analysis. The results indicate that a reduction in the number of interconnections of the Petlyuk configuration does not necessarily provide an improvement of its controllability properties.
ISSN:0098-1354
1873-4375
DOI:10.1016/j.compchemeng.2005.02.027