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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

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.

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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 (CO2) and a second acid gas comprising hydro

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 (CO2) and a second acid gas comprising hydrogen sulfide (H2S);a CO2 treatment system comprising a catalyst configured to at least one of remove impurities present in the first acid gas to produce a treated CO2, or convert the impurities into oxidized compounds to produce the treated CO2, or any combination thereof; anda gasifier supply configured to supply the treated CO2 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 CO2 and oxygen prior to supply of the treated CO2 to the gasifier. 5. The system of claim 1, comprising a monitoring system configured to monitor a composition of the treated CO2. 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 CO2 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 CO2 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 CO2, 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 CO2 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 CO2 in the untreated CO2 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 (CO2) and a second acid gas stream comprising hydrogen sulfide (H2S);a CO2 treatment system comprising a catalyst configured to at least one of remove impurities present in the first acid gas stream to produce a treated CO2 stream, or convert the impurities into oxidized compounds to produce the treated CO2 stream, or any combination thereof; anda gasifier configured to receive the treated CO2 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 CO2 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 CO2 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 CO2 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 CO2 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 (CO2 to be injected into a gasifier, wherein the monitor is configured to monitor a level of impurities in the catalytically treated CO2 after a first CO2 catalytic treatment unit removes impurities present in an untreated CO2 to produce the catalytically treated CO2, or converts the impurities into oxidized compounds to produce the catalytically treated CO2, or any combination thereof, and a concentration of CO2 in the untreated CO2 is greater than approximately 99 percent, wherein the untreated CO2 is received from a carbon capture system configured to separate an untreated acid gas into a first acid gas comprising CO2 and a second acid gas comprising hydrogen sulfide (H2S), and the carbon capture system is configured to receive the untreated acid gas from an acid gas recovery unit; anda controller configured to execute a corrective control function if at least one of the impurities in the composition of the treated CO2 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 CO2 and oxygen as a single flow into the gasifier. 20. The system of claim 18, wherein the controller is configured to actuate a second CO2 catalytic treatment unit if the first CO2 catalytic treatment unit fails to maintain at least one of the impurities in the composition of the catalytically treated CO2 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 (CO2) and a second acid gas comprising hydrogen sulfide (H2S);catalytically treating the first acid gas to produce a treated CO2; andsupplying the treated CO2 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 (CO2) and a second acid gas comprising hydrogen sulfide (H2S), catalytically treating the first acid gas to produce a treated CO2, and supplying the treated CO2 to a gasifier.