Journal ArticleDOI
Peculiarities of Methane Clathrate Hydrate Formation and Solid-State Deformation, Including Possible Superheating of Water Ice
TLDR
In this paper, a slow, constant-volume heating of water ice plus methane gas mixtures forms methane clathrate hydrate by a progressive reaction that occurs at the nascent ice/liquid water interface.Abstract:
Slow, constant-volume heating of water ice plus methane gas mixtures forms methane clathrate hydrate by a progressive reaction that occurs at the nascent ice/liquid water interface. As this reaction proceeds, the rate of melting of metastable water ice may be suppressed to allow short-lived superheating of ice to at least 276 kelvin. Plastic flow properties measured on clathrate test specimens are significantly different from those of water ice; under nonhydrostatic stress, methane clathrate undergoes extensive strain hardening and a process of solid-state disproportionation or exsolution at conditions well within its conventional hydrostatic stability field.read more
Citations
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Journal ArticleDOI
Physical properties of hydrate-bearing sediments
William F. Waite,J. C. Santamarina,Douglas D. Cortes,Brandon Dugan,David N Espinoza,John T. Germaine,Jaewon Jang,Jongwon Jung,Timothy J. Kneafsey,H. Shin,Kenichi Soga,William J. Winters,Tae Sup Yun +12 more
TL;DR: A review of the current understanding of phenomena involved in gas hydrate formation and the physical properties of hydrate-bearing sediments can be found in this paper, where the magnitudes and interdependencies of these properties are critically important for predicting and quantifying macroscale responses of hydrates to changes in mechanical, thermal, or chemical boundary conditions.
Journal ArticleDOI
Methane Hydrate and Free Gas on the Blake Ridge from Vertical Seismic Profiling
TL;DR: In this paper, the authors measured velocities measured in three drill holes through a gas hydrate deposit on the Blake Ridge, offshore South Carolina, indicate that substantial free gas exists to at least 250 meters beneath the bottom-simulating reflection (BSR).
Journal ArticleDOI
Investigation into gas production from natural gas hydrate: A review
TL;DR: In this paper, the authors comprehensively review the relevant studies of natural gas hydrates and propose their comments, discuss the limitations and challenges, raise some questions and put forward some suggestions from their points of view.
Journal ArticleDOI
Anomalous Preservation of Pure Methane Hydrate at 1 atm
TL;DR: In this paper, the pore pressure at isothermal conditions between 242 and 271 K preserves up to 93% of the hydrate for at least 24 h, reflecting the greatly suppressed rates of dissociation that characterize this regime.
Journal ArticleDOI
A review of solidified natural gas (SNG) technology for gas storage via clathrate hydrates
TL;DR: In this paper, the authors provide an account on the research efforts put forth in solidified natural gas (SNG) technology, which has remarkable potential to store multi-fold volumes of natural gas in compact hydrate crystals offering the safest and the most environmental friendly mode of NG storage.
References
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Journal ArticleDOI
Methane hydrate — A major reservoir of carbon in the shallow geosphere?
TL;DR: The estimated amount of organic carbon in the methane-hydrate reservoir greatly exceeds that in many other reservoirs of the global carbon cycle as discussed by the authors, such as the atmosphere (3.6 Gt), terrestrial biota (830 Gt); terrestrial soil, detritus and peat (1960 Gt).
Book ChapterDOI
The Origin and Distribution of Methane in Marine Sediments
TL;DR: Methane has been detected in several cores of rapidly deposited (> 50 m/my) deep sea sediments as discussed by the authors, and the methane originates predominantly from bacterial reduction of CO2, as indicated by complimentary changes with depth in the amount and isotopic composition of redox-linked pore water constituents.
Journal ArticleDOI
Thermodynamics of clathrate hydrate at low and high pressures with application to the outer solar system
TL;DR: In this paper, the thermodynamic stability of clathrate hydrate is calculated under a wide range of temperature and pressure conditions applicable to solar system problems, using a statistical mechanical theory developed by van der Waals and Platteeuw (1959) and existing experimental data on properties of Clathrate hydrates and their components.
Journal ArticleDOI
Compositions, enthalpies of dissociation, and heat capacities in the range 85 to 270 K for clathrate hydrates of methane, ethane, and propane, and enthalpy of dissociation of isobutane hydrate, as determined by a heat-flow calorimeter
TL;DR: In this article, the Tian-Calvet heat-flow calorimeter was used to measure the enthalpy of dissociation for clathrate hydrates of methane, ethane, and propane.
Journal ArticleDOI
Superheating of metal crystals
TL;DR: In this paper, the free surface of single crystal Ag spheres was coated with continuous layer of Au to inhibit surface initiated melting of Ag at its melting point, and superheating of up to 25 K was observed for time periods of about one minute.