Study on Reuse of Dry Water to Store Methane in a Hydrate Form

Dry water (DW) is a powder composed of hydrophobic silica surrounding tiny water droplets. It’s recently demonstrated to be an effective medium for storage methane in a hydrated form. But the recyclability of DW is not so clear at present. Here we used a dedicated pressure cell to form four dry water methane hydrates samples (DW-MH), corresponding to four cycle-types of hydrate formation and dissociation, to investigate the reuse of dry water. The results show that part of water escape from DW and become “free water” after DW-MH is dissociated. The free water is hard to form hydrate during the next cycle of hydrate formation. As a result, the gas storage capacity of DW-MH decreases dramatically as the using times of DW increases.

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Experimental Investigation of Effect on Hydrate Formation in Spray Reactor

Journal of Chemistry ◽

10.1155/2015/261473 ◽

2015 ◽

Vol 2015 ◽

pp. 1-5 ◽

Cited By ~ 2

Author(s):

Jianzhong Zhao ◽

Yaqin Tian ◽

Yangsheng Zhao ◽

Wenping Cheng

Keyword(s):

Storage Capacity ◽

Pure Water ◽

Formation Rate ◽

Hydrate Formation ◽

Gas Storage ◽

Temperature And Pressure ◽

Increase Production Cost ◽

Lower Temperature ◽

Gas Volume ◽

Experimental Rig

The effects of reaction condition on hydrate formation were conducted in spray reactor. The temperature, pressure, and gas volume of reaction on hydrate formation were measured in pure water and SDS solutions at different temperature and pressure with a high-pressure experimental rig for hydrate formation. The experimental data and result reveal that additives could improve the hydrate formation rate and gas storage capacity. Temperature and pressure can restrict the hydrate formation. Lower temperature and higher pressure can promote hydrate formation, but they can increase production cost. So these factors should be considered synthetically. The investigation will promote the advance of gas storage technology in hydrates.

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Direct measurement of formation and dissociation rate and storage capacity of dry water methane hydrates

Fuel Processing Technology ◽

10.1016/j.fuproc.2011.04.008 ◽

2011 ◽

Vol 92 (8) ◽

pp. 1617-1622 ◽

Cited By ~ 24

Author(s):

Gaowei Hu ◽

Yuguang Ye ◽

Changling Liu ◽

Qingguo Meng ◽

Jian Zhang ◽

...

Keyword(s):

Direct Measurement ◽

Storage Capacity ◽

Dissociation Rate ◽

Methane Hydrates ◽

Dry Water ◽

And Storage

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Dry Water: a Prospective Material for Methane Storage via Clathrate Hydrate Form

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.399-401.1473 ◽

2011 ◽

Vol 399-401 ◽

pp. 1473-1476

Author(s):

Chang Ling Liu ◽

Gao Wei Hu ◽

Yu Guang Ye ◽

Qing Guo Meng

Keyword(s):

Storage Capacity ◽

Hydration Number ◽

Sodium Dodecyl ◽

Gas Storage ◽

Clathrate Hydrate ◽

Methane Storage ◽

Water Molecules ◽

High Speeds ◽

Dry Water ◽

Mixing Water

Dry water (DW) is a powder-like, solidified form of water, where water droplets are surrounded by silica nanoparticles. DW is considered to be an effective medium for gas storage because it can slurp up gases which combine the water molecules to form clathrate hydrate. In this paper, DW was prepared by mixing water and hydrophobic silica particles (H18) at high speeds, and based on which, dry water methane hydrates (DW-MH) were synthesized under certain conditions. The characteristics of DW and DW-MH were investigated by Raman spectroscopy. The results show that DW-MH is a typetical sI clathrate hydrate with hydration number around 5.9. The storage capacity in clathrate hydrate prepared with methane and four different materials, i.e. DW, powder ice, Sodium Dodecyl Sulfate (SDS) solution and liquid water, was measured by volumetric method. The results showed that DW is prospective medium for gas storage that can increase much higher of the storage capacity compared to other materials.

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