C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 2/04 (2006.01) B01J 19/10 (2006.01) C04B 2/06 (2006.01) C04B 18/06 (2006.01)
Patent
CA 2224901
A process for hydrating CaO residues in fluidised bed combustor ashes that both achieves a better level of hydration, which does not add significantly to the cost of the hydration process, which reduces the consumption of water in the hydration process, and which if desired can trap at least some of the CO2 in the furnace gasses, by using some of it to convert the hydrated CaO to CaCO3. This both reduces the amount of CO2 released to the atmosphere, and converts the potentially dangerous Ca0 in the ashes into an effectively inert and benign material. The hydration reaction between the solid CaO containing ashes and water is activated sonochemically. By exposing the ash/water mixture to sound under the correct conditions of frequency, and power input it is possible to improve both the rate of hydration, and the level of hydration, of FBC ashes. The process can be carried out either batchwise or continuously, and does not require an extended time period.
Her Majesty In Right Of Canada As Represented By The Minister Of
Shapiro Cohen
LandOfFree
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