Abstract: A solvent and method for removing carbon dioxide from a gaseous mixture flow with high carbon dioxide partial pressures are disclosed. The solvent includes a secondary or tertiary amine, an amine activator, a physical solvent (e.g., thioalkanol), and a carbonate buffer. The solvent contains less than about 60% by weight of water and is in a single liquid phase.

Abstract: A solvent and method for removing carbon dioxide from a gaseous mixture flow with high carbon dioxide partial pressures are disclosed. The solvent includes a secondary or tertiary amine, an amine activator, a physical solvent (e.g., thioalkanol), and a carbonate buffer. The solvent contains less than about 60% by weight of water and is in a single liquid phase.

Abstract: A process, system or apparatus for recovering C02 from a gas has an absorption section, cooling section, regeneration section and more than three heating sections and involves a split in the C02 rich stream from the first heating section. A solvent for recovering C02 from a gaseous mixture comprising a primary amino hindered alcohol or tertiary amine in combination with a derivative of piperazine with three or more amino groups as promoter and a carbonate buffer is also disclosed.