Evaluation of the thermodynamic models UNIQUAC and UNIFAC using artificial neural networks

Leliana C. Borges, Marcelo Castier

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The purpose of this paper is the formulation and implementation of a neural network for the evaluation of the thermodynamic models UNIQUAC and UNIFAC, so that their performance in the calculation of vapor-liquid equilibria, a very important aspect of chemical process design, can be estimated. A multi-layer network with feedforward connections is used. Each processing unit is a semi-linear neuron (the activation rule is a sigmoid function) and synapses do not exist between elements of the same layer. The training and prediction examples are obtained from vapor-liquid equilibrium data for several isothermal binary systems composed of hydrocarbons and alcohols. The temperature of the system, UNIFAC groups and acentric factor of the compounds and mean pressure deviation of the UNIQUAC and UNIFAC models are used in the examples. For the implementation of the network, the software NeuralWorks Professional II/Plus, NEURALWARE, Inc. is used. After training, satisfactory agreement was found between the answers calculated by the network and the output patterns presented to it. The success of the implementation is demonstrated by testing its predictive capability.

Original languageEnglish
Title of host publicationProceedings of the International Joint Conference on Neural Networks
PublisherPubl by IEEE
Pages999-1002
Number of pages4
ISBN (Print)0780314212, 9780780314214
Publication statusPublished - 1 Dec 1993
EventProceedings of 1993 International Joint Conference on Neural Networks. Part 1 (of 3) - Nagoya, Jpn
Duration: 25 Oct 199329 Oct 1993

Publication series

NameProceedings of the International Joint Conference on Neural Networks
Volume1

Other

OtherProceedings of 1993 International Joint Conference on Neural Networks. Part 1 (of 3)
CityNagoya, Jpn
Period25/10/9329/10/93

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ASJC Scopus subject areas

  • Software
  • Artificial Intelligence

Cite this

Borges, L. C., & Castier, M. (1993). Evaluation of the thermodynamic models UNIQUAC and UNIFAC using artificial neural networks. In Proceedings of the International Joint Conference on Neural Networks (pp. 999-1002). (Proceedings of the International Joint Conference on Neural Networks; Vol. 1). Publ by IEEE.