Effect of silica particles on the stability of methane hydrates

Prasad, P. B. V.; Chari, Vangala Dhanunjana; Sharma, Deepala V.S.G.K.; Murthy, S. R.

doi:10.1016/j.fluid.2012.01.012

“…8). Similar phenomena were observed by other authors [20,21]. Silica sands with smaller mesh size have a larger surface area since the surface area is inversely related to particle size [22].…”

Section: Formation Of Hydrate In the Presence Of A Mixture Of Silica supporting

confidence: 87%

Methane Hydrate Formation and Dissociation in the Presence of Silica Sand and Bentonite Clay

Saw

¹

,

Udayabhanu

²

,

Mandal

³

et al. 2014

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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and available online here Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 70, n°6, pp. 909-1132 et téléchargeable ici D o s s i e rOil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 70 (2015), No. 6, pp. 909-1132 Copyright © 2015, IFP Energies nouvelles > Editorial -Enhanced Oil Recovery (EOR), Asphaltenes and HydratesÉditorial -EOR «récupération assistée du pétrole», Asphaltènes et Hydrates D. Langevin and F. Baudin ENHANCED OIL RECOVERY (EOR) > HP-HT Drilling Mud Based on Environmently-Friendly Fluorinated ChemicalsBoues de forage HP/HT à base de composés fluorés respectueux de l'environnement 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 conditions 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 computed using a real gas equation. The Clausius-Clapeyron equation is used to estimate the enthalpy of hydrate dissociation with measured phase equilibrium data.

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“…From some previous reports the role of stirring in improved kinetics for hydrate formation was clearly evidenced [18][19][20], as the stirring is very useful to renew the contact surface between the liquid and gas phases, thus preventing the formation of a solid crust at the interface. The heat and mass transfer scenarios were different in both stirred and non-stirred systems and play a significant role in the hydrate nucleation, the induction time and the growth of the hydrate after nucleation [28].…”

Section: Resultsmentioning

confidence: 99%

“…At different locations in the system, once the critical hydrate nucleus size was reached then rapid hydrate growth occurred. The method followed to calculate the amount of methane gas consumed in the form of hydrate and the hydrate yield calculations are given elsewhere [18].…”

Section: Resultsmentioning

confidence: 99%

“…In the case of hydrate formation in a porous media it is necessary to account for additional forces such as capillary ones during the growth of the hydrate, though in case of stirring these forces are neglected due to continuous agitation in the system. In our previous paper we reported the effect of silica particles on methane hydrate stability and the kinetic promotion behaviour on hydrate formation in a stirred vessel [18]. Even though hydrate yield was lower in silica + water + CH 4 , the addition of a small amount of silica acts as a kinetic promoter for the formation of MH.…”

Section: Introductionmentioning

confidence: 99%

“…The literature shows that continuous stirring conditions have a predominant effect on the hydrate nucleation and growth, since the water-gas interfacial area is continuously renewed [18][19][20]. The induction time depends on the degree of agitation, the presence of foreign particles, and the rate of heat and mass transfer.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hollow Silica: A novel Material for Methane Storage

Chari

¹

,

Murthy

²

2014

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

Self Cite

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and available online here Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 70, n°6, pp. 909-1132 et téléchargeable ici D o s s i e rOil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 70 (2015), No. 6, pp. 909-1132 Copyright © 2015, IFP Energies nouvelles > Editorial -Enhanced Oil Recovery (EOR), Asphaltenes and HydratesÉditorial -EOR «récupération assistée du pétrole», Asphaltènes et Hydrates D. Langevin and F. Baudin ENHANCED OIL RECOVERY (EOR) > HP-HT Drilling Mud Based on Environmently-Friendly Fluorinated ChemicalsBoues de forage HP/HT à base de composés fluorés respectueux de l'environnement Abstract -Methane gas storage in the form of Methane 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.Re´sume´-La silice creuse : un nouveau mate´riau pour le stockage de me´thane -Le stockage de gaz me´thane sous la forme d'hydrate de me´thane (MH, Methane Hydrate) dans de la silice creuse a e´te´e´tudie´et compare´a`un syste`me de silice pleine avec de l'eau pure. La croissance/dissociation de l'hydrate gazeux a e´te´controˆle´e en suivant les variations de pression (admission du gaz) et de tempe´rature dans un processus isochore classique. L'effet de l'agitation sur la cine´tique de formation des hydrates et le rendement a e´te´clairement mis en e´vidence, dans le cas de syste`mes d'eau pure et de silice pleine, tandis qu'il ne pre´sente aucune influence dans la silice creuse ; et en fait, les rendements restent identiques a`la fois dans des expe´riences avec agitation et sans agitation. Environ 3,6 m.mol de me´thane par gramme d'eau ont e´teć onsomme´s sous forme de MH dans la matrice de silice creuse et la cine´tique de formation a e´te´extreˆmement rapide ($180 min). Toutefois, la conversion du me´thane en MH dans le syste`me de silice pleine avec de l'eau pure s'est ave´re´e environ 10 fois supe´rieure dans un re´acteur agite´par rapport a`un syste`me non-agite´.

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Investigation of the formation behaviors of CO₂ hydrate in porous media below the freezing point

Zhang

¹

,

Yang

²

,

Li

³

et al. 2022

Env Prog and Sustain Energy

1

0

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The formation process of gas hydrate is a stochastic phenomenon considered to be significant for its application in the areas such as hydrate-based technology and natural gas hydrate exploitation. The formation behaviors of CO 2 hydrate were studied in porous media below the freezing point. In addition, the formation experiments were conducted in the high-pressure vessel under different temperature and pressure conditions. The formation process of CO 2 hydrate showed different formation behaviors in the porous media under different experimental conditions. The results showed that the formation rate was higher in earlier stage and the largest formation rate attained 7.18 Â 10 À4 mol h À1 . The influence of initial pressure on the formation rate was indistinctive in porous media below the freezing point. Particle size of the porous media played an important role in affecting the formation characteristic of CO 2 hydrate below the freezing point. The results indicated that, the smaller the particle size of porous media was, the larger the formation rate and the conversion rate of CO 2 hydrate. The maximum conversion rate was attained 90.61%. The results also indicated that CO 2 hydrate had a good gas storage capacity in porous media below the freezing point. The gas storage capacity was close to 160 L/L in frozen quartz sand with the particle size of 250 μm in the experiments. The relative results will provide some insight for sequestration and storage process of CO 2 gas in the form of hydrates into sediments.

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Effect of silica particles on the stability of methane hydrates

Cited by 63 publications

References 34 publications

Methane Hydrate Formation and Dissociation in the Presence of Silica Sand and Bentonite Clay

Methane Hydrate Formation and Dissociation in the Presence of Silica Sand and Bentonite Clay

Hollow Silica: A novel Material for Methane Storage

Investigation of the formation behaviors of CO₂ hydrate in porous media below the freezing point

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Effect of silica particles on the stability of methane hydrates

Cited by 63 publications

References 34 publications

Methane Hydrate Formation and Dissociation in the Presence of Silica Sand and Bentonite Clay

Methane Hydrate Formation and Dissociation in the Presence of Silica Sand and Bentonite Clay

Hollow Silica: A novel Material for Methane Storage

Investigation of the formation behaviors of CO2 hydrate in porous media below the freezing point

Contact Info

Product

Resources

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Investigation of the formation behaviors of CO₂ hydrate in porous media below the freezing point