Moving Boundary Model for Deep-Sea Gas Hydrates Dissociation Mechanism and its Effect on Global Warming

Deep-sea gas hydrates are ice-like crystalline substances in which hydrocarbon and non-hydrocarbon gases are held by hydrogen bonding within rigid cages of water molecules. Gas hydrates are stable in sediments at water depths of over 250 m and can form a layer up to 700 m thick beneath the seafloor. Its Stability is critically sensitive to pressure and temperature conditions within the host sediments. A rise in bottom water temperature or a decrease in water depth cause thinning of the stable hydrate layer by dissociation to form methane gas. Sudden release of 1100-2100 Gt of hydrocarbon gases from dissociation of up to 10% of the global hydrate reservoir has been suggested as the cause of coeval global atmospheric warming through an enhanced greenhouse effect. In this paper we reviewed and correlaed the thermodynamics and the kinetics of gas hydrate decomposition via Jamaluddin model in the sandy Sediments.

کلیدواژه ها:

Gas Hydrate Dissociation ، Global Warming ، Sediment