Second and Third Generation Biofuels: Towards Sustainability and Competitiveness Seconde et troisième génération de biocarburants: développement durable et compétitivité Methane Hydrate Formation and Dissociation in the Presence of Silica Sand and Bentoni

• Main Authors: V. Kumar Saw, G. Udayabhanu, S. Laik
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Methane hydrate
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.653.3524; http://ogst.ifpenergiesnouvelles.fr/articles/ogst/pdf/first/ogst130062.pdf

Abstract—The formation and dissociation of methane hydrates in a porous media containing silica sand of different sizes and bentonite clay were studied in the presence of synthetic seawater with 3.55 wt % salinity. The phase equilibrium of methane hydrate under different experimental condi-tions was investigated. The effects of the particle size of silica sand as well as a mixture of bentonite clay and silica sand on methane hydrate formation and its dissociation were studied. The kinetics of hydrate formation was studied under different subcooling conditions to observe its effects on the induction time of hydrate formation. The amount of methane gas encapsulated in hydrate was com-puted using a real gas equation. The Clausius-Clapeyron equation is used to estimate the enthalpy of hydrate dissociation with measured phase equilibrium data. Résumé — Formation et dissociation d’hydrates de méthane en présence de sable de silice et d’argile de bentonite — La formation et la dissociation d’hydrates de méthane dans un milieu poreux contenant du sable de silice de différentes tailles et de l’argile de bentonite ont éte ́ étudiées en présence d’eau de mer synthétique de 3,55 % poids de salinité. L’équilibre de phase des hydrates de méthane sous différentes conditions expérimentales a éte ́ étudié. Les effets de la taille des particules de sable de silice ainsi que ceux d’un mélange d’argile de bentonite et de