### Abstract

We present results of vapor-liquid equilibrium and critical points calculated using the group-contribution version of an equation of state based on the generalized Van der Waals theory and combining the Staverman-Guggenheim combinatorial term of lattice statistics with an attractive lattice gas expression. Group parameters were fitted using pure component and mixture VLE data. Critical points were calculated using a modified form of the Hicks and Young algorithm. Results for pure components and mixtures were satisfactory in the correlation and prediction of several properties. In the case of critical points, several qualitative aspects of the critical curves in the systems tested could be predicted using this group-contribution EOS and were in agreement with experimental information available in the literature. Even though mixture calculations were limited to n-alkane systems, work is in progress towards the inclusion of additional groups needed to represent other compounds of interest in the oil industry.

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

Pages (from-to) | 599-607 |

Number of pages | 9 |

Journal | Fluid Phase Equilibria |

Volume | 194-197 |

DOIs | |

Publication status | Published - 30 Mar 2002 |

Externally published | Yes |

### Fingerprint

### Keywords

- Critical state
- Equation of state
- Group-contribution
- Hydrocarbon
- Vapor-liquid equilibria

### ASJC Scopus subject areas

- Fluid Flow and Transfer Processes
- Physical and Theoretical Chemistry

### Cite this

*Fluid Phase Equilibria*,

*194-197*, 599-607. https://doi.org/10.1016/S0378-3812(01)00678-1

**High pressure phase equilibrium calculations for hydrocarbon systems using an equation of state based on the lattice fluid theory.** / Mattedi, Silvana; Tavares, Frederico W.; Castier, Marcelo.

Research output: Contribution to journal › Article

*Fluid Phase Equilibria*, vol. 194-197, pp. 599-607. https://doi.org/10.1016/S0378-3812(01)00678-1

}

TY - JOUR

T1 - High pressure phase equilibrium calculations for hydrocarbon systems using an equation of state based on the lattice fluid theory

AU - Mattedi, Silvana

AU - Tavares, Frederico W.

AU - Castier, Marcelo

PY - 2002/3/30

Y1 - 2002/3/30

N2 - We present results of vapor-liquid equilibrium and critical points calculated using the group-contribution version of an equation of state based on the generalized Van der Waals theory and combining the Staverman-Guggenheim combinatorial term of lattice statistics with an attractive lattice gas expression. Group parameters were fitted using pure component and mixture VLE data. Critical points were calculated using a modified form of the Hicks and Young algorithm. Results for pure components and mixtures were satisfactory in the correlation and prediction of several properties. In the case of critical points, several qualitative aspects of the critical curves in the systems tested could be predicted using this group-contribution EOS and were in agreement with experimental information available in the literature. Even though mixture calculations were limited to n-alkane systems, work is in progress towards the inclusion of additional groups needed to represent other compounds of interest in the oil industry.

AB - We present results of vapor-liquid equilibrium and critical points calculated using the group-contribution version of an equation of state based on the generalized Van der Waals theory and combining the Staverman-Guggenheim combinatorial term of lattice statistics with an attractive lattice gas expression. Group parameters were fitted using pure component and mixture VLE data. Critical points were calculated using a modified form of the Hicks and Young algorithm. Results for pure components and mixtures were satisfactory in the correlation and prediction of several properties. In the case of critical points, several qualitative aspects of the critical curves in the systems tested could be predicted using this group-contribution EOS and were in agreement with experimental information available in the literature. Even though mixture calculations were limited to n-alkane systems, work is in progress towards the inclusion of additional groups needed to represent other compounds of interest in the oil industry.

KW - Critical state

KW - Equation of state

KW - Group-contribution

KW - Hydrocarbon

KW - Vapor-liquid equilibria

UR - http://www.scopus.com/inward/record.url?scp=0037196746&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037196746&partnerID=8YFLogxK

U2 - 10.1016/S0378-3812(01)00678-1

DO - 10.1016/S0378-3812(01)00678-1

M3 - Article

AN - SCOPUS:0037196746

VL - 194-197

SP - 599

EP - 607

JO - Fluid Phase Equilibria

JF - Fluid Phase Equilibria

SN - 0378-3812

ER -