METHOD OF FIXING CARBON DIOXIDE
First Claim
Patent Images
1. A method of fixing carbon dioxide comprising:
- (a) treating natural mineral or steel slag with an acid to extract metal ion components;
(b) injecting carbon dioxide into an extraction solution containing the extracted metal ion components in (a) to carbonate the same;
(c) transferring a solution in which the resulting carbonates in (b) are dissolved to a dissolved carbonate storage tank and storing the same; and
(d) transferring the stored dissolved carbonates to a carbonate separation/purification tank and adjusting pH to 7 or above to separate the carbonates.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and system of fixing carbon dioxide is provided. After metal ion components are extracted from, e.g., natural mineral or steel slag through acid treatment, carbon dioxide is injected to fix carbon dioxide by carbonating the same. Since the procedure of pH adjustment is unnecessary, the reaction is carried out effectively and a continuous process is enabled. Accordingly, the disclosed method of fixing carbon dioxide enables effective removal of carbon dioxide produced from the steelmaking industry, thereby significantly reducing greenhouse gas emission and allowing recycling of the discarded steel slag.
-
Citations
14 Claims
-
1. A method of fixing carbon dioxide comprising:
-
(a) treating natural mineral or steel slag with an acid to extract metal ion components; (b) injecting carbon dioxide into an extraction solution containing the extracted metal ion components in (a) to carbonate the same; (c) transferring a solution in which the resulting carbonates in (b) are dissolved to a dissolved carbonate storage tank and storing the same; and (d) transferring the stored dissolved carbonates to a carbonate separation/purification tank and adjusting pH to 7 or above to separate the carbonates. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method of fixing carbon dioxide comprising:
-
(a) treating slag with an acid to extract metal ion components; (b) injecting carbon dioxide into an extraction solution containing the extracted metal ion components in (a) to carbonate the same; (c) transferring a solution in which the resulting carbonates in (b) are dissolved to a first tank and storing the resulting carbonates in the first tank; and (d) transferring the stored dissolved carbonates to a carbonate second tank and adjusting pH to a predetermined range to separate the carbonates. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
-
-
14. A system for fixing carbon dioxide comprising:
-
a first device configured to treat slag with an acid to extract metal ion components; a second device configured to inject carbon dioxide into an extraction solution containing the extracted metal ion components to carbonate the same; a first tank configured to receive a solution in which the carbonates resulting from the injection of carbon dioxide are dissolved and to store the resulting carbonates; and a second tank configured to receive the stored dissolved carbonates and adjust the pH to a predetermined range to separate the carbonates.
-
Specification