On the linearization of Antoine’s law

Pascal Floquet (1)

1 LGC - Laboratoire de Génie Chimique

A multivariate linearized Antoine’s equation (MLAE) is presented in this short note. To our knowledge, it is the first time this multi-linear equation is proposed in the literature. Compared with initial null parameters or « Clapeyron » type initial parameters, that do not take into account the highly non-linear correlation between the parameters B and C, our procedure gives a very good initial guess for the non-linear regression of vapor pressure versus temperature. Fortunately, the multi-linear expression of linearized Antoine’s law is obtained in a simple, non iterative manner. Examples relevant from thermo-dynamical literature are used to show the quality of our MLAE parameters in order to converge to non-linear regression solution of Antoine’s model and to compare our approach with the classical ones.

Mots clés: Antoine's law; Initialization; Linearization

Domaines: Génie chimique

Pascal Floquet. On the linearization of Antoine’s law. Industrial and engineering chemistry research, 2009, 48 (5), pp.2734-2737. ⟨10.1021/ie800892v⟩. ⟨hal-03476773⟩