### Abstract

As an example, the solubility of naphthalene in supercritical CO and C_{2}H_{4}were chosen. Two parameter estimation criteria were compared: use of constant relative error and the maximum likelihood criterion, the latter involves the use of weights derived from the error propagation law. It was found that σ^{2}_{Δy} is very far from being proportional to y^{2}, therefore the use of constant relative error is not justified. In the case of the given solid-fluid equilibrium examples, weights based on constant relative error assumption overemphasize the steep part of the curve where all models fail. None of the models examined were able to describe C_{2}H_{4}-naphthalene equilibrium. For CO_{2}-naphthalene the BMRK model proved to be better than the other equations of state investigated.

Original language | English |
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Pages (from-to) | 171-190 |

Number of pages | 20 |

Journal | Fluid Phase Equilibria |

Volume | 100 |

Issue number | C |

DOIs | |

Publication status | Published - Sep 15 1994 |

### Keywords

- equation of state
- methods of calculation
- mixtures
- solid - fluid equilibria
- theory

### ASJC Scopus subject areas

- Chemical Engineering(all)
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry