### Abstract

A two-parameter equation of state is a two-parameter corresponding
states model. A two-parameter corresponding states model is
composed of two scale factor correlations and a reference fluid
equation of state. In a two-parameter equation of state the
reference equation of state is the two-parameter equation of state
itself. If we retain the scale factor correlations derived from a
two-parameter equation of state, but replace the two-parameter
equation of state with a more accurate pure component equation of
state for the reference fluid, we can improve the existing models
of equilibrium properties without refitting any model parameters,
and without imposing other restrictions as regards to species and
mixing rules as already imposed by the two-parameter equation of
state. The theory and procedure is outlined in the paper.

Original language | English |
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Journal | Fluid Phase Equilibria |

Volume | 148 |

Pages (from-to) | 1-19 |

ISSN | 0378-3812 |

Publication status | Published - 1998 |

## Cite this

Mollerup, J. (1998). Unification of the Two-Parameter Equation of State and the
Principle of Corresponding States.

*Fluid Phase Equilibria*,*148*, 1-19.