Franklin M. Orr, Jr.
School of Earth Sciences, Stanford University
Stanford, CA 94305 USA
Science (1999) 284: 943-945.
Received: 29 December 1998.
Accepted: 6 April 1999.
Published: 7 May 1999.
Field experiments were conducted to test ideas for fossil fuel carbon dioxide ocean disposal as a solid hydrate at depths ranging from 349 to 3627 meters and from 8° to 1.6°C. Hydrate formed instantly from the gas phase at 349 meters, but then decomposed rapidly in ambient seawater. At 3627 meters, the seawater-carbon dioxide interface rose rapidly due to massive hydrate formation, forcing spill over of the liquid CO2 from the container. A strong barrier between the liquid carbon dioxide and interaction with the sediments was observed. A pool of liquid carbon dioxide on the sea floor would expand in volume more than 4 times, forming hydrate, which will dissolve.
© 1999 by the American Association for the Advancement of Science
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