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OwnerSunho Choi, Jeffrey H. Drese +3inventors
InventorsSunho Choi, Jeffrey H. Drese, Ronald R. Chance, Peter M. Eisenberger, Christopher W. Jones
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A method for capturing CO2 from the ambient air by the use of solid tethered amine adsorbents, where the amine adsorbents are tethered to a substrate selected from the group of silica, metal oxides and polymer resins. The tethered amines are joined to the substrate by covalent bonding, achieved either by the ring-opening polymerization of aziridine on porous and non-porous supports, or by the reaction of mono-, di-, or tri-aminosilanes, with silica or a metal oxide having hydroxyl surface groups. The method includes the adsorption of CO2 from ambient air, the regeneration of the adsorbent at elevated temperatures not above 120° C. and the separation of purified CO2, followed by recycling of the regenerated tethered adsorbent for further adsorption of CO2 from the ambient atmosphere.
A method for the capture of C02 from dilute gas streams in a cyclical manner, the concentration of CO2 in the gas stream being in the range of from 1-1000 ppm;
A cyclic process for the adsorption and capture of CO2 from ambient air, the process comprising cyclically passing air at ambient conditions through a bed of porous, solid material comprising an oxide substrate-based tethered amine adsorbent, to adsorb the CO2 from the air and form a CO2 loaded adsorbent, the adsorbent comprising a tethered amine derived from the group consisting of hyperbranched aminopolymers and a silylamine prepared by the reaction of a silyl diamine with an oxide substrate;
Dependencies are inferred from the claim text.