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China has for the first time extracted gas from an ice-like substance under the South China Sea considered key to future global energy supply.
Chinese authorities have described the success as a major breakthrough.
Methane hydrates, also called "flammable ice", hold vast reserves of natural gas.
Many countries including the US and Japan are working on how to tap those reserves, but mining and extracting are extremely difficult.
What is 'flammable ice'?
The catchy phrase describes a frozen mixture of water and gas.
"It looks like ice crystals but if you zoom in to a molecular level, you see that the methane molecules are caged in by the water molecules," Associate Professor Praveen Linga from the Department of Chemical and Biomolecular Engineering at the National University of Singapore told the BBC.
Officially known as methane clathrates or hydrates, they are formed at very low temperatures and under high pressure. They can be found in sediments under the ocean floor as well as underneath permafrost on land.
Despite the low temperature, these hydrates are flammable. If you hold a lighter to them, the gas encapsulated in the ice will catch fire. Hence, they are also known as "fire ice" or "flammable ice".
By lowering the pressure or raising the temperature, the hydrates break down into water and methane - a lot of methane. One cubic metre of the compound releases about 160 cubic metres of gas, making it a highly energy-intensive fuel.
originally posted by: FamCore
a reply to: Davg80
if it weren't for the stranglehold petrol companies (& lobbyists) have on global industry, we could take advantage of hemp oil which could solve much of the problems directly related to energy consumption - with added uses in industrial materials and material science applications. It's a real shame...
I'm not sure what you mean by that but these methane deposits have been feared with respect to global warming because some people think there's so much that if it starts melting it might cause a runaway greenhouse effect.
originally posted by: Davg80
i find it a tad strange that they discover these things at a time when they really need to be discovered. (global warming, etc)
Even if the methane is burned it still releases carbon and contributes to global warming.
Research was published this week showing the financial cost of methane being released from Earth’s permafrosts. But the risks go beyond financial - Earth’s history shows that releasing these stores could set off a series of events with calamitous consequences.
The sediments and bottom water beneath the world’s shallow oceans and lakes contain vast amounts of greenhouse gases: methane hydrates and methane clathrates (see Figure 1). In particular methane is concentrated in Arctic permafrost where the accumulation of organic matter in frozen soils covers about 24% of northern hemisphere continents (see Figure 2a) and is estimated to contain more than 900 billion tons of carbon.
Methane, a greenhouse gas more than 30 times more potent than CO2, is released from previously frozen soils when organic matter thaws and decomposes under anaerobic conditions (that is, without oxygen present).
originally posted by: FamCore
a reply to: pteridine
Other plants do possess similar properties, this is true. But hemp grows at a very fast rate, and its strong fibers make it fantastic for industrial uses. I work closely with an organization that works with the Federal Government, Ivy League Universities and botanical experts all over the US CannaDynamics
Hemp has a lot of potential but hasn't had its time to shine because it's suppression through TPTB
More info on Hemp Production and Potentials: www.uky.edu...
originally posted by: pteridine
originally posted by: FamCore
a reply to: pteridine
Other plants do possess similar properties, this is true. But hemp grows at a very fast rate, and its strong fibers make it fantastic for industrial uses. I work closely with an organization that works with the Federal Government, Ivy League Universities and botanical experts all over the US CannaDynamics
Hemp has a lot of potential but hasn't had its time to shine because it's suppression through TPTB
More info on Hemp Production and Potentials: www.uky.edu...
Your original post referred to hemp oil as an energy solution. This is untenable as is the use of hemp biomass in a power plant combustor to generate electricity. It has been shown many times that the energy required for harvesting, processing, and transport exceeds the energy produced except for small facilities using their own waste products, e.g., burning waste to provide steam to a wood processing facility. The costs of transport and processing were borne by the wood product [paper, plywood. etc.] and the energy from combustion is less expensive than other sources in addition to getting rid of the waste products. Pollution from wood combustion must be tightly controlled and the nature of the ash makes it problematic.