Modeling high-pressure densities at wide temperature range with volume scaling: Cyclohexane + n-hexadecane mixtures
| dc.contributor.author | Chiavone Filho, Osvaldo | |
| dc.contributor.author | Amorim, Josinira Antunes de | |
| dc.contributor.author | Paredes, Márcio Luís Lyra | |
| dc.contributor.author | Rajagopal, Krishnaswamy | |
| dc.date.accessioned | 2021-11-17T15:19:41Z | |
| dc.date.available | 2021-11-17T15:19:41Z | |
| dc.date.issued | 2007-10-01 | |
| dc.description.resumo | High-pressure density data for cyclohexane + n-hexadecane mixtures at a wide temperature range was modeled with several classical equations of state (EOS) and correlative models. A modification for softening the co-volume and another for a volume scaling of the Peng–Robinson EOS (VS-PR) were proposed. The VS-PR model is able to correlate the pure component experimental data employing only five adjustable parameters, with root-mean-square deviation (RMSD) between calculated and experimental densities essentially within the experimental error. This result is superior to widely used approaches, i.e., a six parameter Tait model and six parameter volume translations (temperature and pressure dependent) for Peng–Robinson and Patel–Teja EOS. The VS-PR model also represents well the isobaric thermal expansion and the isothermal compressibility coefficients of the pure cyclohexane, a small naphthenic substance as well as a long chain n-alkane hydrocarbon, n-hexadecane. When modeling the mixture data, the use of VS-PR model of pure components along with the Redlich–Kister expansion, truncated at the first term, the density was correlated within a RMSD only 60% greater than the experimental error. The proposed model is able to accurately represent all the tested mixture data with a relatively small number of parameters | pt_BR |
| dc.identifier.citation | CHIAVONE-FILHO, Osvaldo; AMORIM, Josinira Antunes; PAREDES, Márcio Luis Lyra; RAJAGOPAL, Krishnaswamy . Modeling high-pressure densities at wide temperature range with volume scaling: Cyclohexane+n-hexadecane mixtures. Fluid Phase Equilibria, v. 259, p. 89-98, 2007. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0378381207002506?via%3Dihub Acesso em: 16 jun. 2021. https://doi.org/10.1016/j.fluid.2007.05.007. | pt_BR |
| dc.identifier.doi | 10.1016/j.fluid.2007.05.007 | |
| dc.identifier.issn | 0378-3812 | |
| dc.identifier.uri | https://repositorio.ufrn.br/handle/123456789/44930 | |
| dc.language | en | pt_BR |
| dc.publisher | Elsevier | pt_BR |
| dc.subject | High-pressure density | pt_BR |
| dc.subject | Equation of state modeling | pt_BR |
| dc.subject | Thermal expansion coefficient | pt_BR |
| dc.subject | Isothermal compressibility | pt_BR |
| dc.subject | Volume scaling | pt_BR |
| dc.title | Modeling high-pressure densities at wide temperature range with volume scaling: Cyclohexane + n-hexadecane mixtures | pt_BR |
| dc.type | article | pt_BR |
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