Systems and Methods for Extraction of Carbon Dioxide from Air
First Claim
1. A method for extracting or capturing carbon dioxide from air, comprising:
- (a) exposing air containing carbon dioxide to a solution comprising a base;
resulting in a basic solution which absorbs carbon dioxide and produces a carbonate solution;
(b) causticizing the carbonate solution with a titanate containing reagent;
(c) increasing the temperature of the solution generated in step (b) to release carbon dioxide; and
(d) hydrating solid components remaining from step (c) to regenerate the base comprising step (a).
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention describes methods and systems for extracting, capturing, reducing, storing, sequestering, or disposing of carbon dioxide (CO2), particularly from the air. The CO2 extraction methods and systems involve the use of chemical processes. Methods are also described for extracting and/or capturing CO2 via exposing air containing carbon dioxide to a solution comprising a base—resulting in a basic solution which absorbs carbon dioxide and produces a carbonate solution. The solution is causticized and the temperature is increased to release carbon dioxide, followed by hydration of solid components to regenerate the base.
-
Citations
26 Claims
-
1. A method for extracting or capturing carbon dioxide from air, comprising:
-
(a) exposing air containing carbon dioxide to a solution comprising a base;
resulting in a basic solution which absorbs carbon dioxide and produces a carbonate solution;(b) causticizing the carbonate solution with a titanate containing reagent; (c) increasing the temperature of the solution generated in step (b) to release carbon dioxide; and (d) hydrating solid components remaining from step (c) to regenerate the base comprising step (a). - View Dependent Claims (2, 3, 4, 5, 11, 12, 13, 14, 15, 16, 17)
-
-
6. A method for extracting or capturing carbon dioxide from air comprising:
-
(a) exposing air containing carbon dioxide to a solution comprising a base;
resulting in a basic solution which absorbs carbon dioxide and produces a carbonate solution;(b) causticizing the carbonate solution with a calcium hydroxide containing reagent; (c) calcining the resulting calcium carbonate under thermal conditions in which one or more mixed solid oxide membrane is interposed between the combustion gases and the input air; and (d) hydrating the product lime to regenerate the calcium hydroxide required in step (b). - View Dependent Claims (7, 8, 9, 10)
-
-
18. A method for extracting or removing carbon dioxide from air, comprising:
-
(a) calcining a calcium carbonate- or magnesium carbonate-containing material to obtain one or more metal hydroxide calcination products; (b) introducing the calcination products of step (a) into a body of water wherein the calcination products dissolve at or near the water surface; and (c) increasing the alkalinity of the water so as to capture at least two times the amount of carbon dioxide that is released by the calcining of step (a). - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
-
Specification