Carbon dioxide sequestration in foamed controlled low strength materials
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United States of America Patent
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May 12, 2015
Grant Date -
Oct 9, 2008
app pub date -
Jun 12, 2008
filing date -
Feb 24, 2005
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Abstract
A process for sequestering carbon dioxide from the exhaust gas emitted from a combustion chamber is disclosed. In the process, a foam including a foaming agent and the exhaust gas is formed, and the foam is added to a mixture including a cementitious material (e.g., cement-kiln dust, lime kiln dust, or slag cement) and water to form a foamed mixture. Thereafter, the foamed mixture is allowed to set, preferably to a controlled low-strength material having a compressive strength of 1200 psi or less. The carbon dioxide in the exhaust gas reacts with hydration products in the controlled low-strength material and in turn sequesters the carbon dioxide.
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