| Titre : | Approach to Improve Speed of Sound Calculation within PC-SAFT Framework (2013) |
| Auteurs : | Xiaodong Liang, Auteur ; Bjorn Maribo-Mogensen, Auteur ; Kaj Thomsen, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 45, Novembre 2012) |
| Article en page(s) : | pp. 14903–14914 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Speed sound data parameter estimation |
| Résumé : | An extensive comparison of SRK, CPA, and PC-SAFT for the speed of sound in normal alkanes has been performed. The results reveal that PC-SAFT captures the curvature of the speed of sound better than cubic EoS, but the accuracy is not satisfactory. Two approaches have been proposed to improve PC-SAFT’s accuracy for speed of sound: (i) putting speed of sound data into parameter estimation; (ii) putting speed of sound data into both universal constants regression and parameter estimation. The results have shown that the second approach can significantly improve the speed of sound (3.2%) prediction while keeping acceptable accuracy for the primary properties, i.e. vapor pressure (2.1%) and liquid density (1.5%). The two approaches have also been applied to methanol, and both give very good results. |
| ISSN : | 0888-5885 |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie3018127 |
