Permanent storage of carbon dioxide
AssigneeClimate Solutions ApS
InventorErik Trampe
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Abstract
Disclosed is a method for fast and cost-efficient preparation of ikaite crystals. The method comprises contacting an alkaline aqueous solution, which comprises carbonate and bicarbonate ions, with a water solution, which comprises Ca2+, at a temperature not exceeding 15° C., wherein contact between the alkaline aqueous solution and the water solution takes place at a permeable or porous surface, through which either solution is fed to the other at a flow rate facilitating formation of ikaite crystals. Also disclosed is system for carrying out the ikaite preparation process. The process and system provides a cost efficient and effective means for capture and storage of carbon dioxide.
Claims32
A method for preparation of ikaite (CaCO3 6H2O), comprising contacting an alkaline aqueous solution, which comprises carbonate and bicarbonate ions, with a water solution, which comprises Ca2+, at a temperature not exceeding 15° C., wherein contact between the alkaline aqueous solution and the water solution takes place at a permeable or porous surface, through which the alkaline aqueous solution is fed to the water solution or through which the water solution is fed to the alkaline aqueous solution at a flow rate, which is actively controlled to facilitate formation of ikaite crystals, and wherein the alkaline aqueous solution has been prepared by supplying gaseous CO2 to a carbonate solution.
A method for preparation of ikaite (CaCO3 6H2O), comprising contacting an alkaline aqueous solution, which comprises carbonate and bicarbonate ions, with a water solution, which comprises Ca2+, at a temperature not exceeding 15° C., wherein contact between the alkaline aqueous solution and the water solution takes place at a permeable or porous surface, through which the alkaline aqueous solution is fed to the water solution or through which the water solution is fed to the alkaline aqueous solution at a flow rate, which is controlled to facilitate formation of ikaite crystals, and wherein the alkaline aqueous solution has been prepared by supplying gaseous CO2 to a carbonate solution, wherein the flow rate does not exceed a predefined rate until nucleation of ikaite crystals has been accomplished.
Dependencies are inferred from the claim text.