System for treating carbon dioxide
A system includes a carbon dioxide treatment system that includes a catalyst configured to treat carbon dioxide to produce a treated carbon dioxide. The system also includes a gasifier injector configured to inject the treated carbon dioxide, a fuel, and oxygen into a gasifier. The gasifier injector may be coupled to or located inside the gasifier.
1. A system, comprising:
a carbon capture system configured to receive an untreated acid gas from an acid gas recovery unit, wherein the carbon capture system is configured to separate the untreated acid gas into a first acid gas comprising carbon dioxide (CO 2 ) and a second acid gas comprising hydrogen sulfide (H 2 S);
a CO 2 treatment system comprising a catalyst configured to at least one of remove impurities present in the first acid gas to produce a treated CO 2 , or convert the impurities into oxidized compounds to produce the treated CO 2 , or any combination thereof; and
a gasifier supply configured to supply the treated CO 2 to a gasifier.
2. The system of claim 1 , wherein the catalyst comprises a catalytic oxidizer.
3. The system of claim 1 , wherein the impurities comprise at least one of hydrogen sulfide, hydrogen, carbon monoxide, or methane, or a combination thereof.
4. The system of claim 1 , comprising a mixing chamber configured to combine the treated CO 2 and oxygen prior to supply of the treated CO 2 to the gasifier.
5. The system of claim 1 , comprising a monitoring system configured to monitor a composition of the treated CO 2 .
6. The system of claim 5 , comprising a control system configured to execute a corrective control function if at least one of the impurities in the composition of the treated CO 2 is not within a threshold.
7. The system of claim 6 , wherein the impurities comprise at least one of hydrogen sulfide, hydrogen, carbon monoxide, or methane, or a combination thereof.
8. The system of claim 6 , wherein the control system is configured to execute the corrective control function to reduce a flow of the treated CO 2 through the gasifier injector.
9. The system of claim 1 , comprising the gasifier configured to gasify a fuel to produce a syngas.
10. The system of claim 1 , wherein the gasifier supply comprises a gasifier injector configured to inject the treated CO 2 , a fuel, and oxygen into the gasifier.
11. The system of claim 10 , wherein the gasifier injector comprises a common injection passage configured to flow both the treated CO 2 and the oxygen as a single flow.
12. The system of claim 1 , comprising the acid gas recovery unit configured to remove acid gases from a syngas to produce a treated syngas and the untreated acid gas comprising the acid gases, wherein the untreated acid gas is separate from the treated syngas.
13. The system of claim 1 , wherein a concentration of CO 2 in the untreated CO 2 is greater than approximately 99 percent.
14. A system, comprising:
an acid gas recovery unit configured to remove acid gases from a syngas to produce a treated syngas stream and an untreated stream comprising the acid gases, wherein the untreated stream is separate from the treated syngas stream;
a carbon capture system configured to separate the untreated stream into a first acid gas stream comprising carbon dioxide (CO 2 ) and a second acid gas stream comprising hydrogen sulfide (H 2 S);
a CO 2 treatment system comprising a catalyst configured to at least one of remove impurities present in the first acid gas stream to produce a treated CO 2 stream, or convert the impurities into oxidized compounds to produce the treated CO 2 stream, or any combination thereof; and
a gasifier configured to receive the treated CO 2 stream, a fuel, and oxygen into a gasification chamber, wherein the gasifier is configured to gasify the fuel to produce the syngas.
15. The system of claim 14 , comprising a monitoring system configured to monitor a composition of the treated CO 2 stream, and a control system configured to execute a corrective control function if at least one of the impurities in the composition of the treated CO 2 stream is not within a threshold.
16. The system of claim 14 , comprising an alarm system configured to output an alarm if at least one of the impurities in the composition of the treated CO 2 stream is not within a threshold.
17. The system of claim 14 , comprising a gasifier injector having a common injection passage configured to flow both the treated CO 2 stream and the oxygen as a single flow.
18. A system, comprising:
a monitor configured to monitor a composition of a catalytically treated carbon dioxide (CO 2 to be injected into a gasifier, wherein the monitor is configured to monitor a level of impurities in the catalytically treated CO 2 after a first CO 2 catalytic treatment unit removes impurities present in an untreated CO 2 to produce the catalytically treated CO 2 , or converts the impurities into oxidized compounds to produce the catalytically treated CO 2 , or any combination thereof, and a concentration of CO 2 in the untreated CO 2 is greater than approximately 99 percent, wherein the untreated CO 2 is received from a carbon capture system configured to separate an untreated acid gas into a first acid gas comprising CO 2 and a second acid gas comprising hydrogen sulfide (H 2 S), and the carbon capture system is configured to receive the untreated acid gas from an acid gas recovery unit; and
a controller configured to execute a corrective control function if at least one of the impurities in the composition of the treated CO 2 is not within a threshold.
19. The system of claim 18 , comprising a gasifier injector having a common injection passage configured to flow both the catalytically treated CO 2 and oxygen as a single flow into the gasifier.
20. The system of claim 18 , wherein the controller is configured to actuate a second CO 2 catalytic treatment unit if the first CO 2 catalytic treatment unit fails to maintain at least one of the impurities in the composition of the catalytically treated CO 2 within the threshold.
21. A method, comprising:
gasifying a feedstock to generate a syngas;
removing acid gas from the syngas;
separating the acid gas into a first acid gas comprising carbon dioxide (CO 2 ) and a second acid gas comprising hydrogen sulfide (H 2 S);
catalytically treating the first acid gas to produce a treated CO 2 ; and
supplying the treated CO 2 to a gasifier.
22. A system, comprising:
a gasification controller configured to control one or more operations associated with gasifying a feedstock to generate a syngas, removing acid gas from the syngas, separating the acid gas into a first acid gas comprising carbon dioxide (CO 2 ) and a second acid gas comprising hydrogen sulfide (H 2 S), catalytically treating the first acid gas to produce a treated CO 2 , and supplying the treated CO 2 to a gasifier.