Experimental study of methane hydrate formation and decomposition in the porous medium with different thermal conductivities and grain sizes

The simulate experiments of gas production from methane hydrates reservoirs was proceeded with an experimental apparatus. Especially, TDR technique was applied to represent the change of hydrate saturation in real time during gas hydrate formation and dissociation. In this paper, we discussed and explained material transformation during hydrate formation and dissociation. The hydrates form and grow on the top of the sediments where the sediments and gas connect firstly. During hydrates dissociation by depressurization, the temperatures and hydrate saturation presented variously in different locations of sediments, which shows that hydrates dissociate earlier on the surface and outer layer of the sediments than those of in inner. The regulation of hydrates dissociation is consistent with the law of decomposition kinetics. Furthermore, we investigated the depressurizing range influence on hydrate dissociation process.

Download Full-text

Numerical analysis of experimental studies of methane hydrate formation in a sandy porous medium

Applied Energy ◽

10.1016/j.apenergy.2018.03.075 ◽

2018 ◽

Vol 220 ◽

pp. 681-704 ◽

Cited By ~ 33

Author(s):

Zhenyuan Yin ◽

George Moridis ◽

Hoon Kiang Tan ◽

Praveen Linga

Keyword(s):

Porous Medium ◽

Numerical Analysis ◽

Methane Hydrate ◽

Experimental Studies ◽

Hydrate Formation

Download Full-text

Experimental study of methane hydrate formation kinetics with or without additives and modeling based on chemical affinity

Energy Conversion and Management ◽

10.1016/j.enconman.2013.05.024 ◽

2013 ◽

Vol 76 ◽

pp. 499-505 ◽

Cited By ~ 31

Author(s):

H. Roosta ◽

S. Khosharay ◽

F. Varaminian

Keyword(s):

Experimental Study ◽

Methane Hydrate ◽

Hydrate Formation ◽

Chemical Affinity ◽

Formation Kinetics

Download Full-text

Methane and Carbon Dioxide Hydrate Formation and Dissociation in Presence of a Pure Quartz Porous Framework Impregnated with CuSn12 Metallic Powder: An Experimental Report

Materials ◽

10.3390/ma14175115 ◽

2021 ◽

Vol 14 (17) ◽

pp. 5115 ◽

Cited By ~ 1

Author(s):

Alberto Maria Gambelli ◽

Giulia Stornelli ◽

Andrea Di Schino ◽

Federico Rossi

Keyword(s):

Carbon Dioxide ◽

Porous Medium ◽

Methane Hydrate ◽

Hydrate Formation ◽

Metallic Powder ◽

Equilibrium Curve ◽

Hydrate Dissociation ◽

Porous Framework ◽

Made In ◽

The Ideal

Hydrate formation and dissociation processes were carried out in the presence of a pure quartz porous medium impregnated with a metallic powder made with a CuSn12 alloy. Experiments were firstly made in the absence of that powder; then, different concentrations were added to the porous medium: 4.23 wt.%, 18.01 wt.%, and 30.66 wt.%. Then, the hydrate dissociation values were compared with those present in the literature. The porous medium was found to act as an inhibitor in the presence of carbon dioxide, while it did not alter methane hydrate, whose formation proceeded similarly to the ideal trend. The addition of CuSn12 promoted the process significantly. In particular, in concentrations of up to 18.01 wt.%, CO2 hydrate formed at milder conditions until it moved below the ideal equilibrium curve. For methane, the addition of 30.66 wt.% of powder significantly reduced the pressure required to form hydrate, but in every case, dissociation values remained below the ideal equilibrium curve.

Download Full-text