Thermal conductivity measurements of methane in the dense gaseous state

Abstract

The thermal conductivity of methane has been measured at 1.9, 24.6, 43.6 and 75.1°C and pressures up to 580 atm with a coaxial cylindrical cell. For each of these temperatures, the thermal conductivity — reduced density relationships have been developed and have been used to establish the corresponding ( j ϱ R ) min values. These values have been utilized to calculate thermal conductivities predicted from the Enskog theory. The measured thermal conductivity values also have been used to produce the relationships of k- k ∗ versus ρ R and k- k ∗ versus ( ∂PR ∂TR ) ρR for methane. These relationships also include the thermal conductivity values of other investigators which were found in good agreement with the results of the present study. The experimental results of this investigation for the dense gaseous state assist to establish a continuous unique relationship between the gaseous and liquid states of metahne.