System and method for carbon dioxide capture and sequestration
First Claim
1. A method of removing and concentrating carbon dioxide from carbon dioxide laden air, the method comprisingmixing ambient air with a minor proportion of a carbon dioxide-containing effluent gas,directing a flow of carbon dioxide-laden air through a carbon dioxide capture structure comprising a sorbent capable of adsorbing, or releasably binding, carbon dioxide to remove carbon dioxide from the air, the sorbent being held on the surfaces of a porous solid mass, so that the carbon dioxide is adsorbed, or bound, to the sorbent on the surfaces of the solid mass,directing process heat at the carbon dioxide-containing capture structure to separate carbon dioxide from the sorbent as a more concentrated form of CO2, and to regenerate the sorbent;
- directing another flow of carbon dioxide-laden air through the regenerated carbon dioxide capture structure so that the regenerated sorbent can adsorb or bind additional carbon dioxide, to remove the additional carbon dioxide from the flow of additional carbon dioxide laden air,wherein the flow of carbon dioxide-laden air is directed through a removal chamber and the process heat is directed at the carbon dioxide-containing capture structure in a regeneration chamber; and
the method further comprising alternatively moving the carbon dioxide-containing capture structure between the removal chamber and the regeneration chamber.
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Accused Products
Abstract
A method and a system to remove relatively pure carbon dioxide directly from ambient air. The method comprises generating process heat, to co-generate substantially saturated steam; alternately and repeatedly exposing a sorbent to a flow of ambient air, at substantially ambient conditions, to sorb, and therefore remove, carbon dioxide from said ambient air, and exposing the CO2-laden sorbent to a flow of the co-generated steam, at a temperature in the range of not greater than about 130° C, to release the carbon dioxide, thereby regenerating the sorbent, and capturing relatively pure carbon dioxide. To render this process more efficient, admix with the air a minor amount of a pre-treated effluent gas containing a higher concentration of carbon dioxide than in the atmosphere. The captured carbon dioxide can be stored for further use, or sequestered permanently. The purified carbon dioxide is useful for agriculture or chemical processes.
168 Citations
21 Claims
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1. A method of removing and concentrating carbon dioxide from carbon dioxide laden air, the method comprising
mixing ambient air with a minor proportion of a carbon dioxide-containing effluent gas, directing a flow of carbon dioxide-laden air through a carbon dioxide capture structure comprising a sorbent capable of adsorbing, or releasably binding, carbon dioxide to remove carbon dioxide from the air, the sorbent being held on the surfaces of a porous solid mass, so that the carbon dioxide is adsorbed, or bound, to the sorbent on the surfaces of the solid mass, directing process heat at the carbon dioxide-containing capture structure to separate carbon dioxide from the sorbent as a more concentrated form of CO2, and to regenerate the sorbent; -
directing another flow of carbon dioxide-laden air through the regenerated carbon dioxide capture structure so that the regenerated sorbent can adsorb or bind additional carbon dioxide, to remove the additional carbon dioxide from the flow of additional carbon dioxide laden air, wherein the flow of carbon dioxide-laden air is directed through a removal chamber and the process heat is directed at the carbon dioxide-containing capture structure in a regeneration chamber; and the method further comprising alternatively moving the carbon dioxide-containing capture structure between the removal chamber and the regeneration chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification