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Dynamic analysis of thermally coupled distillation sequences with undirectional flows for the separation of ternary mixtures

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Abstract

The Petlyuk distillation system has been considered with special interest because of the high energy savings it can provide with respect to the operation of sequences based on conventional columns. The original design of the Petlyuk structure, however, shows two interconnections that seem to affect its operational and controllability properties. To overcome this problem, two alternate structures have been suggested that use unidirectional flows of the vapor or liquid interconnecting streams. In this work, a comparative analysis of the control properties of the Petlyuk column and the alternate arrangements with unidirectional interconnecting flows is presented. Through a singular value decomposition analysis, it is shown that the alternate schemes provide better theoretical controllability properties than the Petlyuk system. Closed loop tests using proportional-integral controllers were also carried out, and the results showed that, in most of the cases considered, the alternate arrangements improved the dynamic responses of the Petlyuk column. Such arrangements, therefore, show promising perspectives for its practical consideration.

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Authors and Affiliations

  1. Facultad de Química, Universidad de Guanajuato, Noria Alta s/n, Guanajuato, Gto., México

    Juan Gabriel Segovia-Hernández, Adrián Bonilla-Petriciolet & Luis Ignacio Salcedo-Estrada

  2. Departamento de Ingeniería Química, Instituto Tecnológico de Aguascalientes, Av. López Mateos, Aguascalientes, Ags., México

    Adrián Bonilla-Petriciolet

  3. Facultad de Ingeniería Química, Universidad Michoacana de San Nicolás Hidalgo, Santiago Tapia 403, Morelia, Mich., México

    Luis Ignacio Salcedo-Estrada

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  1. Juan Gabriel Segovia-Hernández
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  2. Adrián Bonilla-Petriciolet
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  3. Luis Ignacio Salcedo-Estrada
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Correspondence to Juan Gabriel Segovia-Hernández.

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Segovia-Hernández, J.G., Bonilla-Petriciolet, A. & Salcedo-Estrada, L.I. Dynamic analysis of thermally coupled distillation sequences with undirectional flows for the separation of ternary mixtures. Korean J. Chem. Eng. 23, 689–698 (2006). https://doi.org/10.1007/BF02705913

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  • DOI: https://doi.org/10.1007/BF02705913

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