Thermal Conductivity of Methane-Hydrate

Details Thermal Conductivity of Methane-Hydrate Thermal Conductivity of Methane-Hydrate

2004-12-10

arxiv.org/abs/cond-mat/0412266v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

13 pages, 3 figures

Scientific paper

10.1007/s10909-005-5481-z

The thermal conductivity of the methane hydrate CH4 (5.75 H2O) was measured in the interval 2-140 K using the steady-state technique. The thermal conductivity corresponding to a homogeneous substance was calculated from the measured effective thermal conductivity obtained in the experiment. The temperature dependence of the thermal conductivity is typical for the thermal conductivity of amorphous solids. It is shown that after separation of the hydrate into ice and methane, at 240 K, the thermal conductivity of the ice exhibits a dependence typical of heavily deformed fine-grain polycrystal. The reason for the glass-like behavior in the thermal conductivity of clathrate compounds has been discussed. The experimental results can be interpreted within the phenomenological soft-potential model with two fitting parameters.

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