Abstract: Methods and systems are provided for producing oxygen through pressure and temperature swing absorption using molten salt under non-corrosive process conditions. The process relies on the ability of the molten salt mixture to selectively absorb oxygen from a gas mixture (e.g. from air) by means of an oxidation reaction under certain process conditions, and subsequently desorb the oxygen from the molten salt mixture by means of the reverse decomposition reaction to produce oxygen under other conditions. Unlike conventional methods, the process parameters may be optimized to obtain operating conditions substantially noncorrosive to conventional high-temperature alloys. Advantages of certain embodiments include reduced process corrosivity, lower cost, and lower energy demands. Optional features include energy economization with external processes and reduction of carbon dioxide footprint compared to currently available processes.

Abstract: The disclosure pertains to removal of carbon dioxide from industrial gas streams. Processes and systems are disclosed for capturing carbon dioxide from a combustion flue gas or from uncombusted natural gas by contacting with an amine blend in a first step, and an advanced solvent in a second step.