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Scientists unlock frozen natural gas
Key Excerpts from Article on Website of Toronto Star
Posted: April 27th, 2008
http://www.thestar.com/sciencetech/article/415215
A remote drilling rig high in the Mackenzie Delta has become the site of a breakthrough that could one day revolutionize the world's energy supply. For the first time, Canadian and Japanese researchers have managed to efficiently produce a constant stream of natural gas from ice-like gas hydrates that, worldwide, dwarf all known fossil fuel deposits combined. "We were able to sustain flow," said Scott Dallimore, the Geological Survey of Canada researcher in charge of the remote Mallik drilling program. "It worked." For a decade now, Dallimore and scientists from a half-dozen other countries have been returning to a site on Richards Island on the very northwestern tip of the Northwest Territories to study methane gas hydrates. A hydrate is created when a molecule of gas in this case, methane or natural gas is trapped by high pressures and low temperatures inside a cage of water molecules. The result is almost but not quite ice. It's more like a dry, white slush suffusing the sand and gravel 1,000 metres beneath the Mallik rig. Heat or unsqueeze the hydrate and gas is released. Hold a core sample to your ear and it hisses. More significant is the fact that gas hydrates concentrate 164 times the energy of the same amount of natural gas. And gas hydrate fields are found in abundance under the coastal waters of every continent. Calculations suggest there's more energy in gas hydrates than in coal, oil and conventional gas combined. Last month, the Mallik team became the first to use that method to get a steady, consistent flow. "That went really well," said Dallimore. "We definitely demonstrated that these hydrates are responsive enough that you can sustain flow. We were able to take conventional technologies, modify them, and produce. That's a big step forward."
Note: For lots more information on new energy developments, click here.
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