S082026 Enhanced Methane Hydrate Recovery Using Exothermic Heat of CO2 Hydrate : Flowing under Phase Equilibrium and Heat Generation at the Seepage Front

2012 ◽  
Vol 2012 (0) ◽  
pp. _S082026-1-_S082026-4
Author(s):  
Yojiro IKEGAWA ◽  
Kimio MIYAKAWA ◽  
Koichi SUZUKI ◽  
Shiro TANAKA ◽  
Kenji KUBOTA
Keyword(s):  
Phase Equilibrium ◽  
Heat Generation ◽  
Methane Hydrate

Effect of Fulvic Acid and Sodium Chloride on the Phase Equilibrium of Methane Hydrate in Mixed Sand–Clay Sediment

2019 ◽  
Vol 64 (2) ◽  
pp. 632-639 ◽  
Author(s):  
Tao Lv ◽  
Xiaosen Li ◽  
Zhaoyang Chen ◽  
Chungang Xu ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Phase Equilibrium ◽  
Sodium Chloride ◽  
Fulvic Acid ◽  
Methane Hydrate ◽  
Clay Sediment

Effect of seawater ions on cyclopentane-methane hydrate phase equilibrium

2018 ◽  
Vol 458 ◽  
pp. 272-277 ◽  
Author(s):  
Qiunan Lv ◽  
Xueru Zang ◽  
Xiaosen Li ◽  
Gang Li
Keyword(s):  
Phase Equilibrium ◽  
Methane Hydrate ◽  
Hydrate Phase

scholarly journals Dissociation and Self-Preservation of Gas Hydrates in Permafrost

Geosciences ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 431 ◽  
Author(s):  
Evgeny Chuvilin ◽  
Boris Bukhanov ◽  
Dinara Davletshina ◽  
Sergey Grebenkin ◽  
Vladimir Istomin
Keyword(s):  
Phase Equilibrium ◽  
Gas Hydrates ◽  
Methane Hydrate ◽  
West Siberia ◽  
Gas Pressure ◽  
The Self ◽  
Frozen Soils ◽  
Long Time ◽  
Ice Content ◽  
Gas Bearing

Gases releasing from shallow permafrost above 150 m may contain methane produced by the dissociation of pore metastable gas hydrates, which can exist in permafrost due to self-preservation. In this study, special experiments were conducted to study the self-preservation kinetics. For this, sandy samples from gas-bearing permafrost horizons in West Siberia were first saturated with methane hydrate and frozen and then exposed to gas pressure drop below the triple-phase equilibrium in the “gas–gas hydrate–ice” system. The experimental results showed that methane hydrate could survive for a long time in frozen soils at temperatures of −5 to −7 °C at below-equilibrium pressures, thus evidencing the self-preservation effect. The self-preservation of gas hydrates in permafrost depends on its temperature, salinity, ice content, and gas pressure. Prolonged preservation of metastable relict hydrates is possible in ice-rich sandy permafrost at −4 to −5 °C or colder, with a salinity of <0.1% at depths below 20–30 m.

Phase equilibrium of methane hydrate in silica sand containing chloride salt solution

2015 ◽  
Vol 90 ◽  
pp. 116-121 ◽  
Author(s):  
Shi-Cai Sun ◽  
Ya-Yun Kong ◽  
Yong Zhang ◽  
Chang-Ling Liu
Keyword(s):  
Phase Equilibrium ◽  
Salt Solution ◽  
Methane Hydrate ◽  
Silica Sand ◽  
Chloride Salt
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