Equilibrium molecular dynamics simulations and the Green-Kubo method are used to the sⅠ hydrates of methane

ethane and ethene to study their thermal conduction at temperature 263.15 K and pressure 3 MPa. Thermal conductivities and mean densities of the hydrates are obtained. Characteristics of thermal conduction in hydrates of hydrocarbon such as methane

ethane or ethene are studied for the effects of host and guest molecules and compactness and regularity of the crystal lattice on thermal conduction. The results show that thermal conduction is similar for the hydrocarbon hydrates that resembles chemically with indistinct difference in molecular weight. The thermal conduction of these hydrocarbon hydrates has similar temperature and pressure dependence and similar crystal structure correlation. The influence of water on thermal conductivity of sⅠ gas hydrates goes far beyond the effect of guest molecules on it. With higher mean molecular weight in hydrates

higher densities are more conducive to enhance the thermal conductivity. More compact crystal lattices improve thermal conductivities. With more regular lattice structures

phonon mean free paths are longer

so that the thermal conductivity of hydrate increases.