china japan extract combustible ice from seafloor
Last Updated : GMT 06:49:16
Arab Today, arab today
Arab Today, arab today
Last Updated : GMT 06:49:16
Arab Today, arab today

China, Japan extract combustible ice from seafloor

Arab Today, arab today

Arab Today, arab today China, Japan extract combustible ice from seafloor

gas flare out from a drilling platform
Beijing - Arab Today

Commercial development of the globe’s huge reserves of a frozen fossil fuel known as “combustible ice” has moved closer to reality after Japan and China successfully extracted the material from the seafloor off their coastlines.
But experts said Friday that large-scale production remains many years away — and if not done properly could flood the atmosphere with climate-changing greenhouse gases.
Combustible ice is a frozen mixture of water and concentrated natural gas. Technically known as methane hydrate, it can be lit on fire in its frozen state and is believed to comprise one of the world’s most abundant fossil fuels.
The official Chinese news agency Xinhua reported that the fuel was successfully mined by a drilling rig operating in the South China Sea on Thursday. Chinese Minister of Land and Resources Jiang Daming declared the event a breakthrough moment heralding a potential “global energy revolution.”
A drilling crew in Japan reported a similar successful operation two weeks earlier, on May 4 offshore the Shima Peninsula.
For Japan, methane hydrate offers the chance to reduce its heavy reliance on imported fuels if it can tap into reserves off its coastline. In China, it could serve as a cleaner substitute for coal-burning power plants and steel factories that have polluted much of the country with lung-damaging smog.
Methane hydrate has been found beneath seafloors and buried inside Arctic permafrost and beneath Antarctic ice. The US and India also have research programs pursuing technologies to capture the fuel.
Estimates of worldwide reserves range from 280 trillion cubic meters up to 2,800 trillion cubic meters, according to the US Energy Information Administration (EIA). By comparison, total worldwide production of natural gas was 3.5 billion cubic meters in 2015, the most recent year available. That means methane hydrate reserves could meet global gas demands for 80 to 800 years at current consumption rates.
Yet efforts to successfully extract the fuel at a profit have eluded private and state-owned energy companies for decades. That is in part because of the high cost of extraction techniques, which can use large amounts of water or carbon dioxide to flood methane hydrate reserves so the fuel can be released and brought to the surface. There are also environmental concerns.
If methane hydrate leaks during the extraction process, it can increase greenhouse gas emissions. The fuel also could displace renewables such as solar and wind power, said David Sandalow, a former senior official with the US State Department now at Columbia University’s Center on Global Energy Policy (CGEP).
However, if it can be used without leaking, it has the potential to replace dirtier coal in the power sector.

Source: Arab News

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