Results 221 to 230 of about 18,698 (267)

Phase Diagram of Methane Hydrates and Discovery of MH-VI Hydrate

The Journal of Physical Chemistry A, 2018
Methane hydrate is not only the predominant natural deposits of permafrost and continental margins of Earth but also the dominant methane-containing phase in the nebula and major moons of gas giants. Depending on the surrounding environment (mainly pressure), seven methane hydrate phases have been discovered by experiment or predicted by computer ...
Yingying Huang, Keyao Li, Xue Jiang, Yan Su, Xiaoxiao Cao, Jijun Zhao   +5 more
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Numerical Simulation of Methane Production from a Methane Hydrate Formation

Industrial & Engineering Chemistry Research, 2008
This paper describes a one-dimensional model for hydrate dissociation in porous media by the depressurization method. A moving boundary, which separates the total simulation zone into two zones, is used. The governing equations consider the convective-conductive heat transfer and mass transfer in the gas and hydrate zones together with the energy ...
LIU Y, STRUMENDO, MATTEO, ARASTOOPOUR H.
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Recovering Methane from Solid Methane Hydrate with Carbon Dioxide

Angewandte Chemie, 2003
CO2 in, CH4 out! From NMR spectroscopic measurements of composition and kinetics, it can be shown that the recovery of methane from methane hydrate is possible through its reaction with CO2 (see diagram), even though the yield is less than that expected from kinetic and thermodynamic arguments.
Lee H, Seo Y, Seo YT, Moudrakovski IL, Ripmeester JA   +4 more
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Methane Hydrate at High Pressure

Journal of Petroleum Technology, 1949
Abstract The conditions at which methane and water form solid hydrates have beenextended from 4,000 to 11,200 pounds per sq. in. The curve at high pressure hadbeen in doubt because of Villard's report of a critical decompositiontemperature.
Riki Kobayashi, Donald L. Katz
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Photocatalytic conversion of methane contained in methane hydrates

Topics in Catalysis, 2005
Photocatalytic conversion of methane dissolved in water at 1 MPa and 100 MPa, and methane contained in methane hydrates was performed. Several photocatalysts based on tungsten oxide and titania was investigated. Both full spectrum and visible light were used as the illumination source.
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Sea Floor Methane Hydrates at Hydrate Ridge, Cascadia Margin

2013
The crest of Hydrate Ridge harbors a variety of gas hydrates in near-surface sediments. Hydrate formation and destruction continuously shape the ridge topography. Interstitial Cl-anomaly patterns in conjunction with video-guided sampling have established that the uppermost sediment column contains several distinct layers of gas hydrate which are ...
Suess, E., Torres, M.E., Bohrmann, G., Collier, R.W., Rickert, D., Goldfinger, C., Linke, P., Heuser, A., Sahling, H., Heeschen, K.U., Jung, C., Nakamura, K., Greinert, J., Pfannkuche, O., Trehu, A.M., Klinkhammer, G.P., Whiticar, M.J., Eisenhauer, A., Teichert, B., Elvert, M.   +19 more
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The structure of deuterated methane–hydrate

The Journal of Chemical Physics, 2000
We present the results of a high-resolution neutron diffraction experiment with a fully deuterated methane hydrate type I at temperatures of 2, 100, and 150 K. Precise crystallographic parameters of the ice-like D2O lattice and the thermal parameters of the encaged methane molecules have been obtained.
C. Gutt, B. Asmussen, W. Press, M. R. Johnson, Y. P. Handa, J. S. Tse   +5 more
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Contrasting the hydration thermodynamics of methane and methanol

Physical Chemistry Chemical Physics, 2019
The hydration thermodynamics of methane and methanol depend on the cavity creation work and energy of van der Waals and H-bonding attractions.
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Hydrates in the methane‐nitrogen system

The Canadian Journal of Chemical Engineering, 1965
AbstractThe gas hydrate equilibrium curves for systems containing methane and nitrogen have been obtained in the temperature interval 32°F. to 72°F. and between pressures of 350 and 5100 Ib./sq.in.abs. The composition of the equilibrium gas and hydrate phases was determined experimentally at 32°F. and 44°F.
Jaysukh Jhaveri, Donald B. Robinson
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Kinetics of methane hydrate dissociation

Doklady Physical Chemistry, 2015
The methane hydrate dissociation at an external pressure of 1 bar has been experimentally studied. The methane dissociation rate depends on the heat transfer intensity in the course of dissociation. Quasi-isothermal and nonisothermal conditions of clathrate dissociation have been compared.
V. E. Nakoryakov, S. Ya. Misyura
openaire   +1 more source