Pressure Effects Few experimental d

Pressure Effects Few experimental data are available on the thermal conductivity of high-pressure gas mixtures. Keyes studied the nitrogen-carbon dioxide system. Comings and his coworkers reported on ethylene-nitrogen and carbon dioxide-ethylene mixtures, rare-gas, and ethane. Rosenbaum and Thodos studied methane-carbon dioxide and methane-carbon tetrafluoride binaries. Although the Lindsay-Bromley method has been suggested as a technique for estimating high-pressure gas thermal conductivities. The mixture is treated as a hypothetical pure component with pseudocritical properties. By the use of Prausnitz and Gunn's modified rules, Table 10-7 has been prepared. With a few exceptions, this simple technique is reliable. The use of other pseudocritical rules has been considered, but the results are not significantly affected. In the CH4 – CF4 case, however, the Stiel and Thodos method yielded the poorest results to make (λ-λ^º)Zc5 = f(ρr,T,M). More data are necessary to comfier the applicability of the Stiel-Thodos relations for dense-gas-mixture thermal conductivities, but, at present, it is the most reliable general method available.

Pressure Effects.Few experimental data are available on the thermal conductivity of high-pressure gas mixtures. Keyes studied the nitrogen-carbon. Dioxide system. Comings and his coworkers reported on ethylene-nitrogen and carbon dioxide - ethylene mixtures rare-gas,,, And ethane. Rosenbaum and Thodos studied methane - carbon dioxide and methane-carbon tetrafluoride binaries.Although the Lindsay-Bromley method has been suggested as a technique for estimating high-pressure gas thermal, conductivities. The mixture is treated as a hypothetical pure component with pseudocritical properties. By the use of Prausnitz and Gunn s. " Modified rules Table 10-7, has been prepared. With a, few exceptions this simple technique is reliable. The use of other. Pseudocritical rules has been considered but the, results are not significantly affected. In the CH4 - CF4 case however,,, The Stiel and Thodos method yielded the poorest results to make (λ - λ ^ º) Zc5 = f (ρ,, R T M).More data are necessary to comfier the applicability of the Stiel-Thodos relations for dense-gas-mixture, thermal conductivities. ,, but at present it is the most reliable general method available.