Methane Storage in Dry Water Gas Hydrates

To improve the application of surfactants in methane hydrate formation, sodium dodecyl sulfate (SDS) was fixed on the surface of polystyrene nanospheres (named as SDS@PSNS). SDS@PSNS resulted in a shorter induction period of hydrate formation compared to SDS. With SDS@PSNS as a promoter, hydrates formed mainly at the bottom of the reactor with a much higher apparent density and higher methane consumption, and during the hydrate dissociation period, less foam was generated. In addition, the recycling experiments showed high stability and good recycling performance of SDS@PSNS in seven methane hydrate formation-dissociation cycles.

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“…The emission spectra were recorded from 350 nm to 550 nm and (1) and the methane hydrate formation with SDS@PSNS as promoter (2).…”

mentioning

confidence: 99%

Methane hydrate formation with surfactants fixed on the surface of polystyrene nanospheres

Wang

Luo

et al. 2015

J. Mater. Chem. A

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“…There are several ways to promote gas hydrate formation rate known at present: use of surfactants (Kumar, Bhattacharjee, Kulkarni, & Kumar, 2015), water spraying to increase surface area between phases (Brown, Taylor, & Bernardo, 2010), use of dry water concept (both of speeding the process and transportation) (Wang, Bray, Adams, & Cooper, 2008), hollow silica (Prasad, Sowjanya, & Dhanunjana Chari, 2014), use of copper nano-particles in water (Li, Liang, Guo, Wang, & Fan, 2006), even use of potato starch (Fakharian, Ganji, Naderi Far, & Kameli, 2012).…”

Section: Utilization Of Coalbed Methanementioning

confidence: 99%

“…At the first stage, it is proposed to create the so called "dry water" -compound consisting of water droplets coated by hydrophobic fumed silica layer preventing droplets from blending (Wang, Bray, Adams, & Cooper, 2008). Dry water (DW) looks like a white fine powder, which is dry on the surface but gets wet if the silica coating is broken and the water is let out.…”

Section: Dry Water Conceptmentioning

confidence: 99%

Coalbed methane: places of origin, perspectives of extraction, alternative methods of transportation with the use of gas hydrate and nanotechnologies

Hanushevych¹,

Srivastava²

2017

Min. miner. depos.

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Purpose. To investigate the main basic physical and chemical properties of coalbed methane (CBM), conditions of its formation and places of occurrence. Special attention is paid to CBM utilization using alternative methods such as gas hydrate technologies and nanotechnologies.Methods. Analysis of geological conditions of CBM occurrence and its content in several countries and methods of increasing gas hydrate formation rate to intensify gas utilization.Findings. The reserves of CBM in different countries are classified according to the amount of gas in each country. A wide review is given to the methods of gas hydrates formation rate intensification and nanotechnologies application using different chemical compounds to utilize and transport CBM by ground transportation. Originality. Gas hydrates and dry water have been proposed as alternative methods of CBM utilization and transportation in a solid form. Practical implications.Colossal amounts of methane released into the atmosphere from underground coal mines can be captured and converted into a solid or powder form for transportation over large distances under moderate thermobaric conditions.

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“…The effect of the heat of hydrate formation on the hydrate growth was lowered by the addition of a small amount of aluminium foam, but at high pressures it has its own limitations [15]. Recently, the use of Dry Water (DW) was reported by Wang et al [16] to increase the effective interacting area of methane gas molecules with water molecules to achieve high hydrate yield, but the reusability and rigorous preparative conditions associated with the system are the main constraints. Further use of dry gel along with DW offered a limited solution for reusability as the hydrate conversion capability was highly reduced in subsequent freezing and thawing cycles [17].…”

Section: Introductionmentioning

confidence: 99%

Hollow Silica: A novel Material for Methane Storage

Chari

Murthy

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 -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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Methane Storage in Dry Water Gas Hydrates

Cited by 317 publications

References 19 publications

Methane hydrate formation with surfactants fixed on the surface of polystyrene nanospheres

Methane hydrate formation with surfactants fixed on the surface of polystyrene nanospheres

Coalbed methane: places of origin, perspectives of extraction, alternative methods of transportation with the use of gas hydrate and nanotechnologies

Hollow Silica: A novel Material for Methane Storage

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