D o s s i e r Second and Third Generation Biofuels: Towards Sustainability and Competitiveness Seconde et troisième génération de biocarburants: développement durable et compétitivité Hollow Silica: A Novel Material for Methane Storage

• Main Authors: Vangala Dhanunjana Chari, Pinnelli S. R. Prasad, Sarabu Ramana Murthy
• 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=10.1.1.656.181; http://ogst.ifpenergiesnouvelles.fr/articles/ogst/pdf/first/ogst130211.pdf

Abstract—Methane gas storage in the form ofMethane Hydrate (MH) in hollow silica was studied and compared with solid silica and pure water systems. The gas hydrate growth/dissociation was monitored by following the pressure (gas intake) – temperature variations in a classical isochoric process. The effect of stirring on the hydrate formation kinetics and yield was clearly evidenced in the case of solid and pure water systems, whereas it did not show any influence in hollow silica; and in fact, the yields remained identical in both stirring and non-stirring experiments. Approximately 3.6 m.mol of methane per gram of water was consumed as MH in the hollow silica matrix and the formation kinetics was extremely fast (180 min). However, the methane gas conversion into MH in solid silica and pure water systems was 10 times higher in a stirred reactor when compared with a non-stirred system. Résume ́ — La silice creuse: un nouveau matériau pour le stockage de méthane — Le stockage de gaz méthane sous la forme d’hydrate de méthane (MH,Methane Hydrate) dans de la silice creuse a éte ́ étudie ́ et compare ́ a ̀ un système de silice pleine avec de l’eau pure. La croissance/dissociation de l’hydrate gazeux a éte ́ contrôlée en suivant les variations de pression (admission du gaz) et de température dans un processus isochore classique. L’effet de l’agitation sur la cinétique de