Carbon dioxide sequestration using alkaline earth metal-bearing minerals
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United States of America Patent
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May 25, 2010
Grant Date -
Aug 18, 2005
app pub date -
Dec 30, 2004
filing date -
Dec 31, 2003
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Abstract
A method for mineral sequestration of pollutant gases resulting from the combustion of carbon-based fuels such as carbon and sulfur dioxides is provided and includes, providing a particulate magnesium-containing mineral and exposing the magnesium-containing mineral to a weak acid to dissolve magnesium from the mineral and form a magnesium-containing solution. The surface of the particulate magnesium-containing mineral is physically activated to expose and dissolve additional magnesium into the solution. Pollutant gases such as carbon dioxide are mixed with the magnesium-containing solution. When the pH of the magnesium-containing solution is increased, solid magnesium carbonate is formed.
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