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US 11,400,410 B2Granted
Compositions and methods for carbon dioxide capture
AssigneeThe Board of Trustees of the University of Illinois
InventorsYongqi Lu, Yang Du, Qing Ye
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Abstract
An aqueous solvent composition is provided, comprising a nucleophilic component having one or more sterically unhindered primary or secondary amine moieties, a Brønsted base component having one or more basic nitrogen moieties, a water-soluble organic solvent, and water. A biphasic composition is provided, comprising one or more carbamate compounds, one or more conjugate acids of Brønsted base, a water-soluble organic solvent, and water. A biphasic CO2 absorption process is also provided, utilizing the biphasic solvent composition.
Claims17
An aqueous composition comprising:
- a) at least two nucleophilic compounds, wherein the nucleophilic compounds comprise a sterically unhindered primary amine moiety, a sterically unhindered secondary amine moiety, or a combination thereof;
- b) at least one Brønsted base, wherein the Brønsted base comprises a basic nitrogen moiety and the Brønsted base does not comprise a sterically unhindered primary amine moiety and a sterically unhindered secondary amine moiety;
- c) about 30% to about 50% by weight of a water-soluble organic solvent, wherein the organic solvent is a glyme;
- and
- d) about 20% to about 40% by weight of water;
- wherein the composition is a homogeneous mixture within the temperature range of 20° C. to 80° C.
3 more elements
Dependencies are inferred from the claim text.