Hollow Silica: A novel Material for Methane Storage

Abstract

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´.

Innovative Approach To Enhance the Methane Hydrate Formation at Near-Ambient Temperature and Moderate Pressure for Gas Storage Applications

“…To compare and analyze the methane uptake for the mixed low loading of HS in 5.56 mol % THF solution with only HS or only THF, the gas uptake for these experiments is presented in Figure 6 along with that reported in the literature. Chari et al 50 and Chari et al 23 reported the methane uptake at 0.0671 ± 0.0034 and 0.0700 ± 0.0041 mol methane gas/mol of water from the formation with HS at 8 MPa and 274.15 K and at 8.85 MPa and 275 K, respectively. Veluswamy et al 38 showed about the same methane uptake, ca.…”

“…HS acts like a third surface and facilitates the gas diffusion into the liquid phase. HS was reported to act as a kinetic promoter for methane hydrate formation . However, many reports proposed that HS can enhance the methane hydrate formation at lower temperatures in the range of 273–275 K. − ,, There have never been reports on using HS for the same purpose at high temperatures.…”

“…This condition is significantly lower than pure water system at the same hydrate yield. Chari et al 23 showed that the methane uptake and hydrate yield in the HS were higher than silica sand and pure water. Additionally, they found that the stirring did not influence the methane hydrate formation kinetics and yield in the HS system.…”

Adsorption-Hydration Sequence Method for Methane Storage in Porous Material Slurry

“…The highest gas uptake of 133.59 V/V bed was acquired at chilling temperature of 268.15 K, which was higher than that of the slurries and fixed beds at chilling temperatures of 263.15 K (runs 1∼6), suggesting the gas uptake could be further improved by adjusting the operation conditions. It was much higher than that in the fixed beds in our previous work (Xiao et al, 2019) and in the suspensions (Kim et al, 2011;Chari et al, 2015). It was noted that in run 9, the gas uptake was 103.93 V/V bed , which was slightly lower than that in runs 3, while the gas loss in run 9 was much lower.…”

Differences in the morphology and vibrational dynamics of crystalline, glassy and amorphous silica – commercial implications

“…20 Experiments show that conversion to methane hydrate was found to be minimal in solid silica and maximal in hollow silica. 21 This is presumably a surface area effect: the hollow silica enables more significant hydrogen-bonding interactions with the water. Computational studies of a hydroxylated silica interacting with methane hydrate confirm the crucial role of hydroxyls.…”