Effect of Cage Occupancy on Stability and Decomposition of Methane Hydrate

2022 ◽  
Author(s):  
Dilare Kainai ◽  
Dongsheng Bai
Keyword(s):  
Methane Hydrate ◽  
Decomposition Of Methane

Numerical Analysis of the Thermal Decomposition of Methane Hydrate

2004 ◽  
Vol 2004 (0) ◽  
pp. 51-52
Author(s):  
Yosuke ETO ◽  
Yuji NAKAMURA ◽  
Genichiro KUSHIDA ◽  
Hiroshi YAMASHITA
Keyword(s):  
Thermal Decomposition ◽  
Numerical Analysis ◽  
Methane Hydrate ◽  
Decomposition Of Methane

scholarly journals Decomposition Characterizations of Methane Hydrate Confined inside Nanoscale Pores of Silica Gel below 273.15 K

Crystals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 200 ◽  
Author(s):  
Lihua Wan ◽  
Xuebing Zhou ◽  
Peili Chen ◽  
Xiaoya Zang ◽  
Deqing Liang ◽  
...  
Keyword(s):  
Silica Gel ◽  
Pore Water ◽  
Methane Hydrate ◽  
Decomposition Temperature ◽  
Water Molecules ◽  
Hydrate Decomposition ◽  
The Reformation ◽  
Hydrate Phase ◽  
Decomposition Of Methane ◽  
Main Factor

The formation and decomposition of gas hydrates in nanoscale sediments can simulate the accumulation and mining process of hydrates. This paper investigates the Raman spectra of water confined inside the nanoscale pores of silica gel, the decomposition characterizations of methane hydrate that formed from the pore water, and the intrinsic relationship between them. The results show that pore water has stronger hydrogen bonds between the pore water molecules at both 293 K and 223 K. The structure of pore water is conducive to the nucleation of gas hydrate. Below 273.15 K, the decomposition of methane hydrate formed from pore water was investigated at atmospheric pressure and at a constant volume vessel. We show that the decomposition of methane hydrate is accompanied by a reformation of the hydrate phase: The lower the decomposition temperature, the more times the reformation behavior occurs. The higher pre-decomposition pressure that the silica gel is under before decomposition is more favorable to reformation. Thus, reformation is the main factor in methane hydrate decomposition in nanoscale pores below 273.15 K and is attributed to the structure of pore water. Our results provide experimental data for exploring the control mechanism of hydrate accumulation and mining.

The theory of injection of liquid carbon dioxide in formation, saturated system “hydrate of methane–methane” in the mode of formation of the intermediate melt zone

2016 ◽  
Vol 11 (2) ◽  
pp. 171-180 ◽  
Author(s):  
V.Sh. Shagapov ◽  
M.K. Khasanov ◽  
R.S. Bayramgulova
Keyword(s):  
Carbon Dioxide ◽  
Methane Hydrate ◽  
Liquid Carbon ◽  
Initial State ◽  
Liquid Carbon Dioxide ◽  
Infinite Layer ◽  
Partially Saturated ◽  
Melted Zone ◽  
Hydrate Saturation ◽  
Decomposition Of Methane

The scheme and the corresponding theoretical model of process of methane replacement by liquid carbon dioxide at his injection in a gas hydrate layer are offered. The flat one-dimensional automodel solution corresponding to injection of carbon dioxide in semi-infinite layer through flat border is constructed. It is fixed that such solution can contain three characteristic zones in general case: the far zone, where there is a methane filtration in the porous medium which is partially saturated by methane hydrate in the absence of phase transitions; the melted zone of products of decomposition of methane hydrate (water and methane) can be formed in the intermediate zone (this zone is formed because of heating owing to injection of warm carbon dioxide); the near zone where there is a filtration of liquid carbon dioxide in the layer which is partially saturated by hydrate of carbon dioxide. The analysis of influence of parameters of layer, his initial state (temperature, pressure and hydrate saturation) and the parameters of the injected dioxide of carbon on the various modes of filtration is conducted.

1317 Decomposition of Methane Hydrate by Radio-Frequency Plasma

2013 ◽  
Vol 2013.51 (0) ◽  
pp. _1317-1_-_1317-2_
Author(s):  
Kensuke FUNADA ◽  
Putra Andi Erwin Eka ◽  
Shinobu MUKASA ◽  
Hiromichi TOYOTA ◽  
Shinfuku NOMURA
Keyword(s):  
Radio Frequency ◽  
Methane Hydrate ◽  
Radio Frequency Plasma ◽  
Frequency Plasma ◽  
Decomposition Of Methane

Effects of Asphaltenes on the Formation and Decomposition of Methane Hydrate: A Molecular Dynamics Study

2016 ◽  
Vol 30 (7) ◽  
pp. 5643-5650 ◽  
Author(s):  
Mucong Zi ◽  
Daoyi Chen ◽  
Haoqing Ji ◽  
Guozhong Wu
Keyword(s):  
Molecular Dynamics ◽  
Methane Hydrate ◽  
Decomposition Of Methane
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