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Methane clathrate (CH 4 ·5.75H 2 O) or (4CH 4 ·23H 2 O), also called methane hydrate, hydromethane, methane ice, fire ice, natural gas hydrate, or gas hydrate, is a solid clathrate compound (more specifically, a clathrate hydrate) in which a large amount of methane is trapped within a crystal structure of water, forming a solid similar to ice.
Methane clathrate, also known commonly as methane hydrate, is a form of water ice that contains a large amount of methane within its crystal structure. Potentially large deposits of methane clathrate have been found under sediments on the ocean floors of the Earth, although the estimates of total resource size given by various experts differ by ...
Methane clathrate block embedded in the sediment of hydrate ridge, off Oregon, USA. Clathrate hydrates, or gas hydrates, clathrates, or hydrates, are crystalline water-based solids physically resembling ice, in which small non-polar molecules (typically gases) or polar molecules with large hydrophobic moieties are trapped inside "cages" of hydrogen bonded, frozen water molecules.
The existence and depth of a hydrate deposit is often indicated by the presence of a bottom-simulating reflector (BSR). A BSR is a seismic reflection indicating the lower limit of hydrate stability in sediments due to the different densities of hydrate saturated sediments, normal sediments and those containing free gas. [2]
Common capacities range from 30 kg (66 lb) to 1,755 kg (3,869 lb). Since the emergence of cube ice machines in the 1970s, they have evolved into a diverse family of ice machines. Cube ice machines are commonly seen as vertical modular devices. The upper part is an evaporator, and the lower part is an ice bin.
The geometry, host-reservoir and physical and chemical properties of the modern natural gas-hydrate occurrences point to a conversion of conventional free-gas accumulations when they were cooled down to a point that was well within the hydrate stability conditions, allowing hydrates to form (see UNEP Global Outlook on Methane Gas Hydrates (2012 ...
Around late 2016, jokes about McDonald’s ice cream machines constant out-of-order status started percolating on the internet. One of the earliest instances is a viral video titled ...
The low hydrate saturation can be explained due to the very small pore size and low permeability in clay-rich sediments, which hinder the mobility of both water and gas, necessary for hydrate formation (see UNEP Global Outlook on Methane Gas Hydrates (2012, in progress) for more details). In contrast, Japanese scientists were able to discover ...
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