What is combustible ice? What's the use of combustible ice
Sihai network: Recently, according to the state geological administration, the expected target of natural ice mixture in the South China Sea has been completed. The first well has been tested and successfully exploited. At present, the total amount of combustible ice mined has exceeded the world record. Many small partners don't know what natural ice is. Let's take a look at it together with the small editor. (this article is edited and sorted by Sihai network, reprinted and noted.) Source, original link: http://www.4hw.com.cn/life/)
What is combustible ice
Natural gas hydrate (gas hydrate for short) is a kind of crystalline cage formed by the interaction of host molecules (water) and object molecules (methane, ethane and other hydrocarbon gases, as well as nitrogen, carbon dioxide and other non hydrocarbon gases) under the conditions of low temperature (- 10 ℃ ~ + 28 ℃), high pressure (1 ~ 9Mpa) and van der Waals force, which is distributed in the deep-sea sediments or permafrost on the land In the bulk complex, water molecules form a crystal lattice by hydrogen bond, and the pores in the lattice are filled with light hydrocarbon, heavy hydrocarbon or non hydrocarbon molecules.
Hydrate has a very strong capacity of gas storage. A unit volume of gas hydrate can store 100-200 times the volume of gas. It is also called 'flammable ice' or 'solid gas' and' gas ice 'because it looks like ice and can burn in case of fire. The methane content of natural gas hydrate accounts for 80% - 99.9%, the combustion pollution is much smaller than coal, oil and natural gas, and the reserves are rich. The global reserves are enough for human use for 1000 years, so it is regarded as the alternative energy of oil and natural gas in the future by all countries.
Natural gas hydrate occurs in the sedimentary layer hundreds of meters to more than 1000 meters below the deep sea bottom with water depth of more than 100-250m (polar area) and more than 400-650m (equatorial area). The pressure and temperature conditions here can make natural gas hydrate in a stable solid state. (this article is edited and collated by sihai.com, reprinted and noted with source, original link: http://www.4hw.com.cn/life/)
In May 2017, China's first trial production of natural gas hydrate (combustible ice) in the sea area was successful. Up to now, there is no perfect mining plan in the world. Even the smallest damage to this kind of deposit can lead to a large amount of methane gas loss. The total amount of methane in 'combustible ice' is about 3000 times that in the atmosphere. As a short-term greenhouse gas, methane has a much greater greenhouse effect than carbon dioxide. Once a blowout accident occurs in the exploitation of 'combustible ice' on the coast of the continental margin, the sea water will vaporize and the tsunami ship will overturn.