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"Alfa" function for a series of hydrocarbons to Peng-Robinson and van der Waals equations of state

Osvaldo Chiavone Filho Pedro G Amaral Filho; Douglas Nascimento Silva; Luiz Roberto Terron 1946-

Industrial and Engineering Chemistry Research Washington v. 40, n. 28, p. 6240-6244, 2001

São Paulo 2001

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  • Título:
    "Alfa" function for a series of hydrocarbons to Peng-Robinson and van der Waals equations of state
  • Autor: Osvaldo Chiavone Filho
  • Pedro G Amaral Filho; Douglas Nascimento Silva; Luiz Roberto Terron 1946-
  • Assuntos: TERMODINÂMICA (FÍSICO-QUÍMICA); HIDROCARBONETOS
  • É parte de: Industrial and Engineering Chemistry Research Washington v. 40, n. 28, p. 6240-6244, 2001
  • Descrição: This paper reports estimated coefficients for the"alfa" function based on vapor pressure data to a series of 438 components, mainly hydrocarbons, for both vas der Waals and Peng-Robinson equations of state(EoS). The"alfa" function utilized for the attractive term is the one proposed by Mathias and Copeman in 1983, and it improves the cubic EoS calculations. Accurate vapor-pressure correlations and critical data required for the estimation of the constants were retrieved from two databases, i.e., AICHE DIPPR and the Reid et al. (The Properties of Gases and Liquids; McGraw-Hill: New York, 1987) reference book. The method of calculation is described, and the constants are tested with respect of their representation of thermodynamic properties, mainly in terms of the vapor-pressure deviations. The behavior of density and enthalpy EoS predictions is also evaluated. The estimated coefficients for the "alfa" function are reported in the Supporting Information and may be applied as a dat bank in a simulator, providing more accurate thermodynamic property calculations in the recommended temperature range, as demonstrated
  • Editor: São Paulo
  • Data de criação/publicação: 2001
  • Formato: p. 6240-6244.
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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