(398e) Modeling of Methane Recovery from Gas Hydrate Particle Decomposition Under Fluidized Conditions

Natural gas hydrates (NGH) are widely distributed in the sea area as potential energy resources. In this work, a fluidized bed was used for the first time for the process of methane recovery from natural gas hydrate. The decomposition of a single gas hydrate particle coupling with heat and mass transfer under fluidized conditions was quantitatively modeled. The results demonstrate that the decomposition is faster at a higher water flow velocity. The decomposition takes less time for the hydrate particle with a smaller initial size. Furthermore, the decomposition rates are improved by the convective heat and mass transfer between water and hydrate particle under fluidized conditions. Curve fitting and regression between methane recovery yield, water temperature, water flow velocity and initial particle size is also conducted, which renders quantitative insights in understanding the fundamental mechanism of gas hydrate decomposition under fluidized conditions.