Syngas Yield Enhancement In Converting Carbonaceous Feeds By Gasification And Other Oxidative Methods

An integrated gasification and RWGS process to produce a syngas effluent, or CO2-depleted syngas, from a gasifier vessel with reduced CO2 content, wherein the gasifier vessel includes at least three zones:

• a gasification zone for a carbonaceous feed (where drying, devolatilization, oxidation reactions, and gasification reactions take place), a CO2 reduction zone, and a syngas cooling zone, the process comprising:
• adding H2 to the CO2 reduction zone downstream of the gasification zone to reduce the CO2 content in raw syngas from the gasification zone via RWGS reactions, optionally performed non-catalytically, to produce additional CO and H2O, and/or
• adding one or more hydrocarbons (e.g., methane, ethane, and/or propane) to the CO2 reduction zone downstream of the gasification zone to reduce the CO2 content in the raw syngas from the gasification zone via dry reforming reactions, optionally performed non-catalytically, to produce additional CO and H2,
• wherein at least one of the gasification zone, CO2 reduction zone, and syngas cooling zone constitutes a separate vessel relative to the other zones.

An integrated gasification, in-situ RWGS process, and in-situ dry reforming process to produce a syngas effluent, or CO2-depleted syngas, from a gasifier vessel with reduced CO2 content, wherein the gasifier vessel includes at least three zones:

• a gasification zone for a carbonaceous feed (where drying, devolatilization, oxidation reactions, and gasification reactions take place), a CO2 reduction zone, and a syngas cooling zone, the process comprising:
• adding hydrogen to the CO2 reduction zone downstream of the gasification zone to reduce the CO2 content in the raw syngas from the gasification zone via RWGS reactions, optionally performed non-catalytically, to produce more CO and H2O, and/or
• adding one or more hydrocarbons (e.g., methane, ethane, and/or propane) to the CO2 reduction zone downstream of the gasification zone to reduce the CO2 content in the syngas effluent from the gasification zone via dry reforming reactions, optionally performed non-catalytically, to produce additional CO and H2,
• wherein at least one of the gasification zone, CO2 reduction zone, and syngas cooling zone are in a single vessel.