Correlation and prediction of dense fluid transport coefficients. I.n-alkanes

✍ Scribed by M. J. Assael; J. H. Dymond; M. Papadaki; P. M. Patterson

• Publisher: Springer
• Year: 1992
• Tongue: English
• Weight: 467 KB
• Volume: 13
• Category: Article
• ISSN: 0195-928X
• DOI: 10.1007/bf00504436

✦ Synopsis

Recent accurate measurements of the self-diffusion coefficient for n-hexadecane and n-octane and of the viscosity coefficient for n-heptane, n-nonane, and n-undecane over wide pressure ranges have been used to provide a critical test of a previously described method, based on consideration of hard-sphere theory, for the correlation of transport coefficient data. It is found that changes are required to the universal curve for the reduced viscosity coefficient as a function of reduced volume and, also, to the parameters RD, R,, and R;. which were introduced to account for effects of nonspherical molecular shape. The scheme now accounts most satisfactorily for the self-diffusion, viscosity, and thermal conductivity coefficient data for all n-alkanes from methane to hexadecane at densities greater than the critical density.