Effect of dry water on methane separation and recovery from coal mine gas based on hydrate

in the presence of the THF + SDS solution. The maximum average methane recovery rate was 38.15%, the average distribution coefficient was up to 1.99, the average separation factor reached 2.47 and the highest methane concentration in the hydrate phase was 32.2% in DW. In the experimental range, the efficiency of DW in the recovery of methane by gas hydrate separation was greater than that of the stirring system and the system using the THF + SDS compound solution.