Results 211 to 220 of about 10,780 (258)

Hydrophobic hydration of methane

Molecular Physics, 1997
The method of neutron diffraction and isotopic substitution (NDIS) with H/D substitution on both the solute and the solvent was used to determine the hydration structure of a methane molecule (CM4, M = H or D) in terms of partial pair correlation functions g HM(r) and g OM(r).
De Jong, PHK, Wilson, JE, Neilson, GW, Buckingham, AD   +3 more
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Methane hydrate as a “new energy”

2019
Methane hydrate (MH) becomes a promising new energy in some countries including China and Japan due to its huge reservation. The key mission is to find the safe and efficient exploitation method. The exploitation processes will cause stress changes, which may induce submarine landslides and failures of engineering projects.
Cui, Liang, Azizul Moqsud, MD, Hyodo, Masayuki, Bhattacharya, Suby   +3 more
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Mechanisms for Thermal Conduction in Methane Hydrate

Physical Review Letters, 2009
Crystalline clathrate hydrates exhibit an unusual thermal transport with glasslike thermal conductivity close to the Debye temperature but a crystal-like temperature dependence at low temperature. Molecular dynamics calculations on structure I methane clathrate hydrate reproduced the qualitative trend in the thermal conductivity.
English N.J., Tse J.S.
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HYDRATES OF METHANE AND HYDROGEN

2019
Gas hydrates are icelike solids composed of guest molecules or atoms of gases trapped inside the cages formed within a crystalline host framework (clathrate) of hydrogenbonded water molecules. The report will mainly be devoted to various aspects of the formation and decomposition of methane hydrates, large deposits of which are found in permafrost and ...
Antonov, V.E., Efimchenko, V.S., Klyamkin, S.N., Kuzovnikov, M.A., Tkacz, M.   +4 more
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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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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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Dissociation of various gas hydrates (methane hydrate, double gas hydrates of methane-propane and methane-isopropanol) during combustion: Assessing the combustion efficiency

Energy, 2020
Abstract Most of the existing experimental and theoretical studies concern the combustion of methane hydrate. There are no works comparing the features and differences of combustion of different types of gas hydrates. In addition, there is a lack of data on the comparison of different combustion methods.
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