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.
Claims16
A system for preparation of ikaite, comprising:
- at least one compartment for holding an alkaline aqueous solution, which comprises carbonate and bicarbonate,
- at least one compartment for holding a water solution, which comprises Ca2+,
- at least one permeable or porous structure for separating the alkaline aqueous solution and the water solution, said permeable or porous structure allowing feeding through at least one surface of the structure 1) of the alkaline aqueous solution to the water solution or 2) of the water solution to the alkaline aqueous solution,
- a mechanism for causing controlled feeding of either the alkaline aqueous solution or the water solution through the at least one surface of the structure, where the mechanism is adapted to feed either solution through the at least one surface at a flow rate sufficiently low to establish a steady or quasi-steady interface zone between the solutions so as to optimize ikaite formation, and
- a device for supplying gaseous carbon dioxide to the alkaline aqueous solution.
Dependencies are inferred from the claim text.