Methane hydrates formation and dissociation in nano silica suspension

Methane gas hydrate (MH) formation/dissociation were investigated in nano silica and water system in a non-stirred reactor. The MH yield was significantly improved in the presence of nano silica. The overall methane hydrate conversion (≥80%) was achieved by optimizing the nano silica to water ratio....

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Bibliographic Details
Published inJournal of natural gas science and engineering Vol. 11; pp. 7 - 11
Main Authors Chari, Vangala Dhanunjana, Sharma, Deepala V.S.G.K., Prasad, Pinnelli S.R., Murthy, Sarabu Ramana
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.2013
Subjects
Dry water
Formation kinetics
Methane hydrates
Methane storage
Nano suspensions
Self-preservation
Dry water
Self-preservation
Methane storage
Nano suspensions
Formation kinetics
Methane hydrates
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Summary:Methane gas hydrate (MH) formation/dissociation were investigated in nano silica and water system in a non-stirred reactor. The MH yield was significantly improved in the presence of nano silica. The overall methane hydrate conversion (≥80%) was achieved by optimizing the nano silica to water ratio. Two-stage dissociation was observed after a rapid de-pressurization. Methane gas intake of this system was steady for multiple freezing–thawing cycles signifying improved stability for methane gas storage. ► Higher methane hydrate conversions (>80%) in suspensions of nano silica. ► No need of rigorous mixing of silica and water. ► The system is stable for multiple freezing–thawing cycles. ► Higher volumetric hydrate conversion in water to silica optimized system. ► Gas release from hydrates (upon de-pressurization) occurs in two stages in 267–273 & 274–280 K.
ISSN:1875-5100
DOI:10.1016/j.jngse.2012.11.004