Methane hydrate formation in a mixed system of ice powders and sand

The formation of methane hydrate in a mixed system of ice powders and sand was studied at 273 K and at different pressure(5.3 MPa,6.8 MPa,7.9 MPa). The results showed that the formation of methane hydrate was in the shape of aggregation, the velocity of the reaction increased exponentially and the hydrate mole fraction could reach 80 %, the sand increased the velocity of the formation of methane hydrate and the hydrate mole fraction. Both the shrinking model and the swelling model based on the condition of pure ice powders were not suitable for the condition of mixture of ice powders and sand.