High-pressure density measurements for the binary system cyclohexane + n-Hexadecane in the temperature range of (318.15 to 413.15) K

• Autor(a) principal: Chiavone Filho, Osvaldo
• Data de Publicação: 2007
• Outros Autores: Amorim, Josinira Antunes de, Paredes, Márcio Luís Lyra, Rajagopal, Krishnaswamy
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/44952
• topic: High-Pressure Density; Binary System Cyclohexane; n-Hexadecane; Temperature Range

The densities of binary mixtures of n-hexadecane and cyclohexane at high pressures were measured in the range of (6.895 to 62.053) MPa at six different temperatures varying from (318.15 to 413.15) K and for eight compositions. The measurements were made by a high-pressure Anton Paar DMA 512 P densimeter integrated with the Ruska 2370 mercury Free PVT System. The densimeter was calibrated using analytical grade toluene, cyclohexane, and n-heptane as calibration fluids. The experimental error of density measurements is estimated as 0.5 kg‚m-3. The measured densities at 348.15 K agree well with the available literature values at different pressures. The excess volumes, thermal expansion, and isothermal compressibility coefficients were obtained from measured densities. All data were correlated successfully with a modified Peng-Robinson equation of state