Results 61 to 70 of about 45,456 (302)

A well-testing model for partially perforated wells in natural gas hydrate reservoirs

open access: yesFrontiers in Energy Research
Natural gas hydrates (NGH) are considered a very promising source of clean energy due to their widespread distribution, high energy density, and pure combustion products.
Yu Chen   +11 more
doaj   +1 more source

Behavior of air molecules in polar ice sheets (review) [PDF]

open access: yes, 2003
Ancient atmospheric gases are trapped in polar ice sheets. The gas molecules are stored in air bubbles at shallower depth. The air bubbles are gradually compressed with depth and begin to transform into clathrate hydrates below a level at which the ...
Takeo Hondoh, Tomoko Ikeda-Fukazawa
core   +1 more source

Benchmarking the performance of Density Functional Theory and Point Charge Force Fields in their Description of sI Methane Hydrate against Diffusion Monte Carlo [PDF]

open access: yes, 2014
High quality reference data from diffusion Monte Carlo calculations are presented for bulk sI methane hydrate, a complex crystal exhibiting both hydrogen-bond and dispersion dominated interactions.
Angelos Michaelides   +4 more
core   +2 more sources

Engineering Strategies for Stable and Long‐Life Alkaline Zinc‐Based Flow Batteries

open access: yesAdvanced Functional Materials, EarlyView.
Alkaline zinc‐based flow batteries face persistent challenges from unstable zinc deposition, including dendrite growth, passivation, corrosion, and hydrogen evolution, which severely limit cycling stability. Current research addresses these issues through coordinated electrode structuring, electrolyte regulation, and membrane design to control zinc ...
Yuran Bai   +6 more
wiley   +1 more source

The Controlling Factors and Prediction of Deep-Water Mass Transport Deposits in the Pliocene Qiongdongnan Basin, South China Sea

open access: yesJournal of Marine Science and Engineering
Large-scaled submarine slides or mass transport deposits (MTDs) widely occurred in the Pliocene Qiongdongnan Basin, South China Sea. The good seismic mapping and distinctive topography, as well as the along-striking variation in sediment supply, make it ...
Jiawang Ge   +5 more
doaj   +1 more source

Stability, Adsorption and Diffusion of CH4, CO2 and H2 in Clathrate Hydrates

open access: yes, 2010
We present a study of the adsorption and diffusion of CH4, CO2 and H2 molecules in clathrate hydrates using ab initio van der Waals density functional formalism [Dion et al. Phys. Rev. Lett. 92, 246401 (2004)].
E. D. Sloan   +6 more
core   +1 more source

Elucidating the Role of Surface Ligands on the Oxidative Etching of Au Bipyramids During Photothermia Using Liquid Cell Transmission Electron Microscopy

open access: yesAdvanced Functional Materials, EarlyView.
Gold bipyramids can act as efficient plasmonic nanoheaters, but they often reshape during laser heating. This study shows that oxygen nanobubbles drive oxidative etching and that surface ligands control stability. CTAB‐ and citrate‐coated particles blunt and lose optical performance, whereas polystyrene sulfonate preserves shape and heating by ...
Irene López‐Sicilia   +7 more
wiley   +1 more source

Grain size of Quaternary sediments in the continental shelf-margin: implications for paleo-environment in the Northwestern South China Sea

open access: yesFrontiers in Marine Science
IntroductionThe quantitative distribution of grain size of sediments could imply the hydrodynamic conditions as well as terrestrial material composition; and thus, it is indicative of sea-level fluctuations, regional sources and climate changes.
Jiawang Ge   +8 more
doaj   +1 more source

Types of Gas Hydrates in Marine Environments and Their Thermodynamic Characteristics

open access: yesTerrestrial, Atmospheric and Oceanic Sciences, 2006
The hydrates in marine environment can be grouped into two categories,diffusion gas hydrates and vent gas hydrates. The diffusion gas hydrates occur widely in an area where bottom simulation reflector (BSR) was recorded in seismic profiles, and is a ...
Duo-Fu Chen   +2 more
doaj   +1 more source

Evidence of fast pebble growth near condensation fronts in the HL Tau protoplanetary disk [PDF]

open access: yes, 2015
Water and simple organic molecular ices dominate the mass of solid materials available for planetesimal and planet formation beyond the water snow line.
Bergin, Edwin A.   +2 more
core   +3 more sources

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