### Abstract

A modified form of the Hicks and Young algorithm was used with the Mattedi-Tavares-Castier lattice equation of state (MTC lattice EOS) to calculate critical points of binary mixtures that exhibit several types of critical behavior. Several qualitative aspects of the critical curves, such as maxima and minima in critical pressure, and minima in critical temperature, could be predicted using the MTC lattice EOS. These results were in agreement with experimental information available in the literature, illustrating the flexibility of the functional form of the MTC lattice EOS. We observed however that the MTC lattice EOS failed to predict maxima in pressure for two of the studied systems: ethane + ethanol and methane + n-hexane. We also observed that the agreement between the calculated and experimental critical properties was at most semi-quantitative in some examples. Despite these limitations, in many ways similar to those of other EOS in common use when applied to critical point calculations, we can conclude that the MTC lattice EOS has the ability to predict several types of critical curves of complex shape.

Original language | English |
---|---|

Pages (from-to) | 771-783 |

Number of pages | 13 |

Journal | Brazilian Journal of Chemical Engineering |

Volume | 17 |

Issue number | 4 |

Publication status | Published - Dec 2000 |

Externally published | Yes |

### Fingerprint

### Keywords

- Critical points
- Equations of state
- Lattices
- Mixtures

### ASJC Scopus subject areas

- Chemical Engineering(all)

### Cite this

*Brazilian Journal of Chemical Engineering*,

*17*(4), 771-783.

**Calculation of mixture critical diagrams using an equation of state based on the lattice fluid theory.** / Mattedi, S.; Tavares, F. W.; Castier, M.

Research output: Contribution to journal › Article

*Brazilian Journal of Chemical Engineering*, vol. 17, no. 4, pp. 771-783.

}

TY - JOUR

T1 - Calculation of mixture critical diagrams using an equation of state based on the lattice fluid theory

AU - Mattedi, S.

AU - Tavares, F. W.

AU - Castier, M.

PY - 2000/12

Y1 - 2000/12

N2 - A modified form of the Hicks and Young algorithm was used with the Mattedi-Tavares-Castier lattice equation of state (MTC lattice EOS) to calculate critical points of binary mixtures that exhibit several types of critical behavior. Several qualitative aspects of the critical curves, such as maxima and minima in critical pressure, and minima in critical temperature, could be predicted using the MTC lattice EOS. These results were in agreement with experimental information available in the literature, illustrating the flexibility of the functional form of the MTC lattice EOS. We observed however that the MTC lattice EOS failed to predict maxima in pressure for two of the studied systems: ethane + ethanol and methane + n-hexane. We also observed that the agreement between the calculated and experimental critical properties was at most semi-quantitative in some examples. Despite these limitations, in many ways similar to those of other EOS in common use when applied to critical point calculations, we can conclude that the MTC lattice EOS has the ability to predict several types of critical curves of complex shape.

AB - A modified form of the Hicks and Young algorithm was used with the Mattedi-Tavares-Castier lattice equation of state (MTC lattice EOS) to calculate critical points of binary mixtures that exhibit several types of critical behavior. Several qualitative aspects of the critical curves, such as maxima and minima in critical pressure, and minima in critical temperature, could be predicted using the MTC lattice EOS. These results were in agreement with experimental information available in the literature, illustrating the flexibility of the functional form of the MTC lattice EOS. We observed however that the MTC lattice EOS failed to predict maxima in pressure for two of the studied systems: ethane + ethanol and methane + n-hexane. We also observed that the agreement between the calculated and experimental critical properties was at most semi-quantitative in some examples. Despite these limitations, in many ways similar to those of other EOS in common use when applied to critical point calculations, we can conclude that the MTC lattice EOS has the ability to predict several types of critical curves of complex shape.

KW - Critical points

KW - Equations of state

KW - Lattices

KW - Mixtures

UR - http://www.scopus.com/inward/record.url?scp=0346346512&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0346346512&partnerID=8YFLogxK

M3 - Article

VL - 17

SP - 771

EP - 783

JO - Brazilian Journal of Chemical Engineering

JF - Brazilian Journal of Chemical Engineering

SN - 0104-6632

IS - 4

ER -