Analysis and prediction of the alpha-function parameters used in cubic equations of state

Abstract : The performance of two generalized alpha functions (Soave and generalized Twu functions requiring the acentric factor as input parameter) and two parameterizable alpha functions (Mathias-Copeman and Twu) incorporated in cubic equations of state (Redlich-Kwong and Peng-Robinson) is evaluated and compared regarding their ability to reproduce vapor pressure, heat of vaporization, liquid heat capacity, liquid density and second virial coefficient data. To reach this objective, extensive databanks of alpha function parameters were created. In particular, pitfalls of Twu-type alpha functions were evidenced and fixed. A new class of purely predictive alpha functions was derived by applying group-contribution (GC) methods to the prediction of alpha function parameters. The interest of such an approach is discussed and compared to another predictive approach (use of generalized alpha functions coupled with GC methods to predict the acentric factor).
Type de document :
Article dans une revue
Chemical Engineering Science, Elsevier, 2015, 126, pp.584-603. 〈10.1016/j.ces.2014.12.040〉
Domaine :
Liste complète des métadonnées

https://hal.univ-lorraine.fr/hal-01267216
Contributeur : Lrgp Ul <>
Soumis le : jeudi 4 février 2016 - 10:10:48
Dernière modification le : samedi 10 février 2018 - 10:52:01

Lien texte intégral

Identifiants

Collections

Citation

Romain Privat, Maxime Visconte, Anis Zazoua-Khames, Jean-Noël Jaubert, Rafiqul Gani. Analysis and prediction of the alpha-function parameters used in cubic equations of state. Chemical Engineering Science, Elsevier, 2015, 126, pp.584-603. 〈10.1016/j.ces.2014.12.040〉. 〈hal-01267216〉

Partager

Métriques

Consultations de la notice

87