Carbon dioxide sequestration in foamed controlled low...

Details Carbon dioxide sequestration in foamed controlled low... Carbon dioxide sequestration in foamed controlled low...

B - Operations, Transporting

01

D

B01D 53/62 (2006.01) C04B 28/08 (2006.01) C04B 38/10 (2006.01)

Patent

CA 2537383

A process for sequestering carbon dioxide from the flue gas emitted from a combustion chamber is disclosed. In the process, a foam including a foaming agent and the flue gas is formed, and the foam is added to a mixture including a cementitious material (e.g., fly ash) 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 flue gas and waste heat reacts with hydration products in the controlled low-strength material to increase strength. In this process, the carbon dioxide is sequestered. The CLSM can be crushed or pelletized to form a lightweight aggregate with properties similar to the naturally occurring mineral, pumice.

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