Back to results
US 2024/0091703 A1Published application
Method and apparatus for low temperature regeneration of acid gas using a catalyst
AssigneeSaudi Arabian Oil Company
InventorGuillaume Robert Jean-Francois Raynel
Life of this patent
Estimating the term…
Abstract
A method for regenerating carbon dioxide and hydrogen sulfide from acid gas using a catalyst containing a group 2 element is provided. The method reduces the energy required for the regeneration process and allows for an efficient and cost-effective way to regenerate acid gas.
Claims25
A method for removing carbon dioxide (CO2) from an air or gas stream, comprising:
- contacting the air or gas stream containing CO2 with an aqueous composition comprising an aqueous carbonate (or amine) solution and a regeneration catalyst under absorber conditions to form an aqueous bicarbonate composition;
- heating the aqueous bicarbonate composition to about 45° C. to less than about 100° C. to free a gaseous stream comprising CO2 from the aqueous bicarbonate composition, resulting in an aqueous carbonate composition;
- and
- collecting the gaseous stream comprising CO2;
- wherein the regeneration catalyst comprises an element from group 2 of the periodic table.
2 more elements
A method for removing hydrogen sulfide (H2S) from a gas stream, comprising:
- contacting the gas stream containing H2S with an aqueous composition comprising an aqueous carbonate (or amine) solution and a regeneration catalyst under conditions to form an aqueous hydrosulfide composition;
- heating the aqueous hydrosulfide composition to about 60° C. to less than about 100° C. to free a gaseous stream comprising H2S from the aqueous hydrosulfide composition, resulting in an aqueous hydroxide composition;
- and
- collecting the gaseous stream comprising H2S;
- wherein the regeneration catalyst comprises an element from group 2 of the periodic table.
2 more elements
A method of treating acid gas, comprising:
- contacting a stream of the acid gas with an aqueous composition comprising an aqueous carbonate (or amine) solution and a regeneration catalyst to form a combined gas-liquid composition;
- heating the gas-liquid composition to about 60° C. to less than about 100° C. to free a gaseous stream comprising CO2, H2S, or both from the gas-liquid composition;
- and
- collecting the gaseous stream comprising the CO2, H2S, or both;
- wherein the regeneration catalyst comprises an element from group 2 of the periodic table.
2 more elements
Dependencies are inferred from the claim text.