An improved group contribution method for PC-SAFT applied to branched alkanes: Data analysis and parameterization
- Resource Type
- Authors
- Rafael Lugo; J.-C. de Hemptinne; Elmar Sauer; W. Babe; M. Jaber; Joachim Gross
- Source
- Fluid Phase Equilibria. 473:183-191
- Subject
- Work (thermodynamics)
Vapor pressure
Chemistry
General Chemical Engineering
General Physics and Astronomy
Parameterized complexity
Thermodynamics
02 engineering and technology
Function (mathematics)
021001 nanoscience & nanotechnology
Group contribution method
020401 chemical engineering
Molecule
0204 chemical engineering
Physical and Theoretical Chemistry
0210 nano-technology
- Language
- ISSN
- 0378-3812
In this work, the heterosegmented GC-PC-SAFT model is parameterized for branched alkanes. Branched alkanes can be regarded as the skeleton of more complex molecules. Analyzing experimental data of branched alkanes in comparison to the linear analogous gives rationale to decisions about what substances require a more refined or individualized parameterization. A neighborhood-correction of the segment-number parameter is then proposed for branched alkanes as function of the distance between the functional groups. This correction leads to better agreement with experimental data in the prediction of vapor pressure (27% AAD compared to 39%) and allows distinguishing isomers.