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REPUBLIC OF SERBIA MINISTRY OF DEFENCE
MINISTRY OF DEFENCE Material Resources Sector Defensive Technologies Department
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Estimation OF SAFT and PC-SAFT EOS parameters for n-heptane UNDER HIGH PRESSURE conditions
JOVANA ILIĆ Institute of Chemistry, Technology and Metalurgy, University of Belgrade, Belgrade, Serbia, jilic@tmf.bg.ac.rs MIRKO STIJEPOVIĆ Institute of Chemistry, Technology and Metalurgy, University of Belgrade, Belgrade, Serbia ALEKSANDAR GRUJIĆ Institute of Chemistry, Technology and Metalurgy, University of Belgrade, Belgrade, Serbia JASNA STAJIĆ-TROŠIĆ Institute of Chemistry, Technology and Metalurgy, University of Belgrade, Belgrade, Serbia GORICA IVANIŠ Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia MIRJANA KIJEVČANIN Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia
Abstract:Thermodynamic models for calculations of thermodynamic properties at different operating conditions are of the great importance forprocess industry. In this work, the SAFT and PC-SAFT equations of state (EOS) were employed to estimate n-heptane densities under high pressure conditions. The new sets of parameters for the SAFT and PC-SAFT EOS are estimated using densities of n-heptane measured in the extensive ranges of temperature and pressure (288.15-413.15K and 0.1-60MPa, respectively). In order to comparecalculated densities with the selected literature data, the absolute average percentage deviation (AAD) of 0.155 % and 0.075 %, the percentage maximum deviation (MD) of 1.389 % and 0.324 %, the average percentage deviation (Bias) -0.001 % and 0 and the standard deviation (σ) of 0.001kg·m-3 for SAFT and PC-SAFT have been obtained, respectively. Keywords: parameter estimation, n-heptane, density, SAFT, PC-SAFT. |
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