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US 2009/0263302 A1Published application
Self-Concentrating Absorbent for Acid Gas Separation
OwnerLiang Huinventor
Life of this patent
Estimating the term…
Abstract
An process for efficiently deacidizing a gaseous mixture is described. The process utilizes a self-concentrating absorbent that absorbs an acid gas at reduced overall energy costs for the deacidizing operation.
Claims18
A method for deacidizing a gaseous mixture comprising an acid gas, comprising:
- contacting the gaseous mixture with an absorbent in an absorption unit, wherein the absorbent comprises an amine dissolved in a solvent at a first concentration;
- allowing the absorbent to absorb the acid gas to form a concentrated-amine phase, wherein the concentrated-amine phase is mechanically separable from the remaining of the absorbent and comprises a concentrated amine at a concentration higher than the first concentration and an absorbed acid gas, wherein the concentrated amine comprises the amine or the amine having a chemical modification, and the absorbed acid gas comprises the acid gas or the acid gas having a chemical modification;
- separating the concentrated-amine phase from the remaining of the absorbent;
- cycling the remaining of the absorbent back into the absorption unit;
- providing the concentrated-amine phase to a regeneration unit, so as to obtain the acid gas and the concentrated amine;
- and
- cycling the regenerated concentrated amine back into the absorption unit.
4 more elements
A system for deacidizing a gaseous mixture comprising an acid gas, comprising:
- an absorption unit adapted to allow contact between the gaseous mixture and an absorbent comprising an amine dissolved in a solvent at a first concentration, wherein the absorbent absorbs the acid gas to form a concentrated-amine phase, wherein the concentrated-amine phase is mechanically separable from the remaining of the absorbent, and the concentrated-amine phase comprises a concentrated amine at a concentration higher than the first concentration and an absorbed acid gas, wherein the concentrated amine comprises the amine or the amine having a chemical modification, and the absorbed acid gas comprises the acid gas or the acid gas having a chemical modification
- a separation unit adapted to allow separation of the concentrated-amine phase from the remaining of the absorbent;
- and
- a regeneration unit adapted to allow regeneration of the concentrated-amine phase, so as to obtain the acid gas and the concentrated amine.
1 more element
A method for deacidizing a gaseous mixture comprising an acid gas, comprising:
- contacting the gaseous mixture with an absorbent in an absorption unit, wherein the absorbent comprises an agent dissolved in a solvent at a first concentration, wherein the agent is selected from the group consisting of amino-acid salts, amides, alkaline salts, alkaline-earth salts, ammonium salts, ureas, alkaline metal phosphates, carbonates, borates, acid phosphites, phosphites, phosphonite, phosphinate, phosphonate, acid phosphates, pyrophosphites, bicarbonates, metaborates, diborates, tetraborates, pentaborates, and combinations thereof;
- allowing the absorbent to absorb the acid gas to form a concentrated-agent phase, wherein the concentrated-agent phase is mechanically separable from the remaining of the absorbent and comprises a concentrated agent at a concentration higher than the first concentration and an absorbed acid gas, wherein the concentrated agent comprises the agent or the agent having a chemical modification, and the absorbed acid gas comprises the acid gas or the acid gas having a chemical modification;
- separating the concentrated-agent phase from the remaining of the absorbent;
- cycling the remaining of the absorbent back into the absorption unit;
- providing the concentrated-agent phase to a regeneration unit, so as to obtain the acid gas and the concentrated agent;
- and
- cycling the regenerated concentrated agent back into the absorption unit.
4 more elements
A system for deacidizing a gaseous mixture comprising an acid gas, comprising:
- an absorption unit adapted to allow contact between the gaseous mixture and an absorbent comprising an agent dissolved in a solvent at a first concentration,
- wherein the agent is selected from the group consisting of amino-acid salts, amides, alkaline salts, alkaline-earth salts, ammonium salts, ureas, alkaline metal phosphates, carbonates, borates, acid phosphites, phosphites, phosphonite, phosphinate, phosphonate, acid phosphates, pyrophosphites, bicarbonates, metaborates, diborates, tetraborates, pentaborates, and combinations thereof;
- wherein the absorbent absorbs the acid gas to form a concentrated-agent phase, the concentrated-agent phase is mechanically separable from the remaining of the absorbent, and the concentrated-agent phase comprises a concentrated agent at a concentration higher than the first concentration and an absorbed acid gas,
- wherein the concentrated agent comprises the agent or the agent having a chemical modification, and the absorbed acid gas comprises the acid gas or the acid gas having a chemical modification;
- a separation unit adapted to allow separation of the concentrated-agent phase from the remaining of the absorbent;
- and
- a regeneration unit adapted to allow regeneration of the concentrated-agent phase, so as to obtain the acid gas and the concentrated agent.
4 more elements
Dependencies are inferred from the claim text.