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Consequences of property errors on the design of distillation columns

Consequences of property errors on the design of distillation columns
Consequences of property errors on the design of distillation columns
In modern design simulators, the initial input for the estimation of the phase behaviour of mixtures is a series of characteristic parameters of the pure species, such as the normal boiling point Tb, the critical temperature Tc and the critical pressure Pc. For many components encountered in practice, these parameters are not available from experiment, and therefore, they must be estimated.
The study of the propagation of errors in these estimated parameters through to the final design of an item of process plant — a distillation column separating binary and ternary mixtures — is the purpose of the present work. The likely magnitude of uncertainties in the input Tb, Tc and Pc is generated by the application of several popular and accepted methods.
Considerable uncertainties in the predicted designs are demonstrated. Greater attention should be devoted to the development and employment in modern simulators of more sophisticated methods ensuring better description of molecular structures and intermolecular interactions.
normal boiling point, critical properties, method of calculation, vapour–liquid equilibria, plant design
1-12
Wakeham, William A.
88549729-a39a-497f-b112-feaa6be2c449
Cholakov, Georgi St.
d4531add-c925-4133-b448-0c816da0261b
Stateva, Roumiana P.
41722d4d-ff00-4dba-9fba-3ea8fde9bb92
Wakeham, William A.
88549729-a39a-497f-b112-feaa6be2c449
Cholakov, Georgi St.
d4531add-c925-4133-b448-0c816da0261b
Stateva, Roumiana P.
41722d4d-ff00-4dba-9fba-3ea8fde9bb92

Wakeham, William A., Cholakov, Georgi St. and Stateva, Roumiana P. (2001) Consequences of property errors on the design of distillation columns. Fluid Phase Equilibria, 185 (1-2), 1-12. (doi:10.1016/S0378-3812(01)00490-3).

Record type: Article

Abstract

In modern design simulators, the initial input for the estimation of the phase behaviour of mixtures is a series of characteristic parameters of the pure species, such as the normal boiling point Tb, the critical temperature Tc and the critical pressure Pc. For many components encountered in practice, these parameters are not available from experiment, and therefore, they must be estimated.
The study of the propagation of errors in these estimated parameters through to the final design of an item of process plant — a distillation column separating binary and ternary mixtures — is the purpose of the present work. The likely magnitude of uncertainties in the input Tb, Tc and Pc is generated by the application of several popular and accepted methods.
Considerable uncertainties in the predicted designs are demonstrated. Greater attention should be devoted to the development and employment in modern simulators of more sophisticated methods ensuring better description of molecular structures and intermolecular interactions.

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More information

Published date: 2001
Keywords: normal boiling point, critical properties, method of calculation, vapour–liquid equilibria, plant design

Identifiers

Local EPrints ID: 39584
URI: http://eprints.soton.ac.uk/id/eprint/39584
PURE UUID: 38e6310c-6db8-460b-90dc-3c1b6e277f77

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Date deposited: 30 Jun 2006
Last modified: 15 Jul 2019 19:00

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Contributors

Author: William A. Wakeham
Author: Georgi St. Cholakov
Author: Roumiana P. Stateva

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