Journal article
Approach to Improve Speed of Sound Calculation within PC-SAFT Framework
Center for Energy Resources Engineering (CERE), Department of Chemical and Biochemical Engineering1
Center for Energy Resources Engineering (CERE), Department of Chemistry2
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.
Language: | English |
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Publisher: | American Chemical Society |
Year: | 2012 |
Pages: | 14903-14914 |
ISSN: | 15205045 and 08885885 |
Types: | Journal article |
DOI: | 10.1021/ie3018127 |