Methane hydrate crystal growth in a porous medium filled with methane-saturated liquid water

2007 ◽  
Vol 87 (7) ◽  
pp. 1057-1069 ◽  
Author(s):  
D. Katsuki ◽  
R. Ohmura ◽  
T. Ebinuma ◽  
H. Narita
Keyword(s):  
Porous Medium ◽  
Crystal Growth ◽  
Liquid Water ◽  
Methane Hydrate ◽  
Saturated Liquid ◽  
Hydrate Crystal

scholarly journals Crystal growth of clathrate hydrates formed with methane + carbon dioxide mixed gas at the gas/liquid interface and in liquid water

2015 ◽  
Vol 39 (11) ◽  
pp. 8254-8262 ◽  
Author(s):  
Hiroki Ueno ◽  
Hotaka Akiba ◽  
Satoru Akatsu ◽  
Ryo Ohmura
Keyword(s):  
Carbon Dioxide ◽  
Crystal Growth ◽  
Liquid Water ◽  
Liquid Interface ◽  
Clathrate Hydrates ◽  
Mixed Gas ◽  
Hydrate Crystal ◽  
Methane Carbon

Observations of CH4 + CO2 hydrate crystal growth formed at the gas/liquid interface and in liquid water were made.

Dynamics of Methane−Propane Clathrate Hydrate Crystal Growth from Liquid Water with or without the Presence ofn-Heptane

2006 ◽  
Vol 6 (6) ◽  
pp. 1428-1439 ◽  
Author(s):  
Ju Dong Lee ◽  
Myungho Song ◽  
Robin Susilo ◽  
Peter Englezos
Keyword(s):  
Crystal Growth ◽  
Liquid Water ◽  
Clathrate Hydrate ◽  
Hydrate Crystal

Clathrate Hydrate Crystal Growth in Liquid Water Saturated with a Guest Substance:  Observations in a Methane + Water System

2005 ◽  
Vol 5 (3) ◽  
pp. 953-957 ◽  
Author(s):  
Ryo Ohmura ◽  
Sadatoshi Matsuda ◽  
Tsutomu Uchida ◽  
Takao Ebinuma ◽  
Hideo Narita
Keyword(s):  
Crystal Growth ◽  
Liquid Water ◽  
Water System ◽  
Clathrate Hydrate ◽  
Hydrate Crystal ◽  
Water Saturated

scholarly journals Pectin as an Extraordinary Natural Kinetic Hydrate Inhibitor

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Shurui Xu ◽  
Shuanshi Fan ◽  
Songtian Fang ◽  
Xuemei Lang ◽  
Yanhong Wang ◽  
...  
Keyword(s):  
Growth Rate ◽  
Crystal Growth ◽  
Induction Time ◽  
Methane Hydrate ◽  
Hydrate Formation ◽  
Maximum Growth ◽  
Maximum Growth Rate ◽  
Inhibition Activity ◽  
Hydrate Crystal ◽  
Crystal Growth Inhibition

Abstract Pectin as a novel natural kinetic hydrate inhibitor, expected to be eco-friendly and sufficiently biodegradable, was studied in this paper. The novel crystal growth inhibition (CGI) and standard induction time methods were used to evaluate its effect as hydrate inhibitor. It could successfully inhibit methane hydrate formation at subcooling temperature up to 12.5 °C and dramatically slowed the hydrate crystal growth. The dosage of pectin decreased by 66% and effective time extended 10 times than typical kinetic inhibitor. Besides, its maximum growth rate was no more than 2.0%/h, which was far less than 5.5%/h of growth rate for PVCap at the same dosage. The most prominent feature was that it totally inhibited methane hydrate crystal rapid growth when hydrate crystalline occurred. Moreover, in terms of typical natural inhibitors, the inhibition activity of pectin increased 10.0-fold in induction time and 2.5-fold in subcooling temperature. The extraordinary inhibition activity is closely related to its hydrogen bonding interaction with water molecules and the hydrophilic structure. Finally, the biodegradability and economical efficiency of pectin were also taken into consideration. The results showed the biodegradability improved 75.0% and the cost reduced by more than 73.3% compared to typical commercial kinetic inhibitors.

Alkyl-chain disorder in tetraisohexylammonium bromide

2012 ◽  
Vol 68 (4) ◽  
pp. o152-o155 ◽  
Author(s):  
Malcolm A. Kelland ◽  
Amber L. Thompson
Keyword(s):  
Crystal Structure ◽  
Crystal Growth ◽  
Alkyl Chain ◽  
Growth Inhibitor ◽  
Ammonium Cation ◽  
Asymmetric Unit ◽  
Bromide Anion ◽  
Alkyl Chains ◽  
Hydrate Crystal ◽  
Structure Ii Clathrate Hydrate

Tetraisohexylammonium bromide [systematic name: tetrakis(4-methylpentyl)azanium bromide], C24H52N+·Br−, is a powerful structure II clathrate hydrate crystal-growth inhibitor. The crystal structure, in the space groupP3221, contains one ammonium cation and one bromide anion in the asymmetric unit, both on general positions. At 100 K, the ammonium cation exhibits one ordered isohexyl chain and three disordered isohexyl chains. At 250 K, all four isohexyl chains are disordered. In an effort to reduce the disorder in the alkyl chains, the crystal was thermally cycled, but the disorder remained, indicating that it is dynamic in nature.

scholarly journals Effect of a Hydrophilic Cationic Surfactant on Cyclopentane Hydrate Crystal Growth at the Water/Cyclopentane Interface

2017 ◽  
Vol 17 (10) ◽  
pp. 5098-5107 ◽  
Author(s):  
Henry Delroisse ◽  
Jean-Philippe Torré ◽  
Christophe Dicharry
Keyword(s):  
Crystal Growth ◽  
Cationic Surfactant ◽  
Hydrate Crystal
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