Hydrate of natural gas “flammable ice” – a new kind of gas fuel.
Gas hydrates, “flammable ice” – crystal compound of hydrocarbon gases, most commonly methane, and water of variable composition. Look like snow or ice and have similar physical properties. One cubic meter of hydrate of natural gas is equivalent to 160 cubic meters of natural gas in the gaseous state.
Hydrate of natural gas “flammable ice” – a rather new but potentially very large natural gas source, able to meet the needs of a growing world economies.
Gas hydrates, “flammable ice” – crystal compound of hydrocarbon gases, most commonly methane, and water of variable composition. Look like snow or ice and have similar physical properties. They are formed during gas-water contact in certain temperature and pressure conditions, and the colder the climate, the more frequent such conditions. Hydrate of natural gas, for example, is formed at 0 centigrade and at a pressure of 25 atmospheres. If the temperature is above, for the formation of gas hydrate needed to increase pressure of water.
The main element of the gas hydrate is a crystalline cell of water molecules, inside which is placed a molecule of combustible gas. In this case the crystal lattice of water, characteristic of ice expanded and contains cavities filled with molecules of natural gas. The cells form a dense crystal lattice similar to ice.
Hydrate of natural gas is one of the forms of existence of natural gas in the bowels.
In the most common in the earth’s crust, the methane hydrate, the ratio between gas and water about 1 to 6. In this specific gas content of methane hydrate reaches 164 cubic meters of natural gas to 1 cubic meter of hydrate.
According to the General opinion of oil and gas geologists, natural gas hydrates contain the main volume of natural gas in the lithosphere. According to various estimates, in natural gas hydrates contain from 2,000 to 5,000 trillion cubic meters of gas. A significant portion of these gas resources located in the Arctic, as it is the presence of powerful (>300 m) layer of eternal permafrost creates the necessary conditions for formation of hydrates and the ocean allows cold water to form gas hydrates from depths of 250-300 m.
On the earlier Russian estimates, in the depths of the Arctic regions of Russia may contain up to 1,000 trillion cubic metres of gas in the hydrate state. However, not all of this gas can be extracted at the present level of development of the technology. But if even 10% of this volume can produce, it will greatly ensure the country’s energy supply for many decades.
First gas hydrates were discovered in the mid 70-ies of the twentieth century, canadian fishermen. Often when lifting from the depths of trawls with fish in them were large pieces like snow stained ground silt substances. Someone had the idea to set fire to this deep snow. And he lit up!
One cubic meter of hydrate of natural gas is equivalent to 160 cubic meters of natural gas in the gaseous state. 100 litres of gas a car can travel 300 kilometers, while 100 litres of “combustible ice” — 50 thousand kilometers.
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