Publication: Research - peer-review › Journal article – Annual report year: 2012
An extensive comparison of SRK, CPA and PC-SAFT for speed of sound in normal alkanes has been performed. The results reveal that PC-SAFT captures the curvature of 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.
|Journal||Industrial & Engineering Chemistry Research|
© 2012 American Chemical Society
|Citations||Web of Science® Times Cited: 4|
- Speed of sound, EOS, PC-SAFT, Universal constants, Parameter estimation