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US 12,458,920 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.
Claims15
A biphasic composition comprising:
- a) at least one carbamate compound comprising a carbamate moiety of a primary amine or a secondary amine;
- b) a Brønsted base wherein the Brønsted base is in the form of its conjugate acid, wherein the Brønsted base does not form a carbamate moiety with carbon dioxide;
- c) about 5% to about 50% by weight of a water-soluble organic solvent, wherein the organic solvent comprises a glyme;
- and
- d) about 5% to about 40% by weight of water;
- wherein the biphasic composition has a CO2-rich phase and a CO2-lean phase;
- wherein the rich phase comprises the highest % weight of water, the highest % weight of the carbamate compound, and the highest % weight of the conjugate acid;
- and the lean phase comprises the highest % weight of the organic solvent.
5 more elements
Dependencies are inferred from the claim text.