Preparation and use of cationic halides, sequestration of carbon dioxide
AssigneeGREENSOLS AUSTRALIA Pty Ltd
InventorsStephen W.M. Blake, Christopher Cuff
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Abstract
A process is described for sequestering carbon dioxide. In the process, a carbonate, oxide or hydroxide of a divalent cation is reacted with the carbon dioxide and water and/or with a species resulting from the dissolution of the carbon dioxide in water, to form a hydrogen carbonate of the divalent cation. The carbonate, oxide or hydroxide of the divalent cation has a low solubility in water. The divalent cation of the hydrogen carbonate of the divalent cation thus formed is exchanged for a monovalent cation using an ion exchange medium, to produce a solution of a hydrogen carbonate of the monovalent cation.
Claims39
A process for sequestration of carbon dioxide, including the steps of:
- adding a halide of a divalent cation to a body of supersaturated carbonate-containing brine which is in contact with a CO2-containing atmosphere so as to cause the halide of the divalent cation to form a carbonate of the divalent cation, said carbonate having low solubility;
- and
- causing the carbonate of the divalent cation to precipitate from the body of carbonate containing brine.
An apparatus for the sequestration of carbon dioxide, comprising:
- a contactor for contacting a halide of a divalent cation to a body of supersaturated carbonate-containing brine which is in contact with a carbon dioxide containing gas so as to cause the halide of the divalent cation to form a carbonate of a divalent cation, which precipitates from the body of carbonate-containing brine, said carbonate having low solubility;
- and
- a separator for separating the carbonate of the divalent cation from the body of carbonate-containing brine.
Dependencies are inferred from the claim text.