Abstract: Methods for dry reforming with a red mud catalyst support composition, one method including providing a methane feed and carbon dioxide feed to react over the red mud catalyst support composition at increased temperature and increased pressure to produce synthesis gas comprising H2 and CO, the composition comprising red mud material produced from an alumina extraction process from bauxite ore.

Abstract: A cementitious print head and a cementitious printing methodology may include a feed barrel, a print head nozzle, a CO2 supply, a steam supply, a selective valve assembly in communication with the CO2 supply and the steam supply, a plurality of dual use extrusion head injectors, and a print head controller. The print head controller is operatively coupled to the selective valve assembly and is programmed to execute a CO2 and steam injection protocol where steam may be selected for injection by the extrusion head injectors into a cementitious composition as it is extruded from the print head nozzle to enhance a hydration reaction and formation of hydroxide in the cementitious composition before CO2 may be selected for injection by the extrusion head injectors into the cementitious composition as it is extruded from the print head nozzle to enhance a carbonation reaction in the cementitious composition.

Abstract: A vehicle CO2 capture and utilization system includes a concrete mixer vehicle and a vehicle exhaust capture system. The concrete mixer vehicle comprises a vehicle exhaust and a mixer tank. The vehicle exhaust capture system is located onboard the concrete mixer vehicle. Additionally, the vehicle exhaust capture system includes one or more fluid pathways that fluidly couple the vehicle exhaust and the mixer tank.

Abstract: A method for curing cementitious articles includes flowing dry steam and carbon dioxide (CO2) simultaneously into a curing chamber containing a cementitious article. A relative humidity within the curing chamber may be between about 50% and about 70% and a temperature within the curing chamber may be between about 50° C. and about 70° C. A dry steam and CO2 mixture with a CO2 concentration between 2.5 vol % and 40 vol % is provided in the curing chamber and the cementitious article is cured for a duration between about 4 hours and 16 hours. Cementitious products cured with the method may have a CO2 uptake of greater than 15 wt % and a mechanical strength at least 10% greater than a cementitious product cured only in dry steam or CO2.

Abstract: Systems for treating a viscous medium are illustrated. The systems may comprise a primary source of pressurized treatment fluid, a fluidic transfer assembly, and a helical mixing element. The fluidic transfer assembly comprises a fluidic transfer chamber and a fluid outlet. The primary source of pressurized treatment fluid is in fluidic communication with the fluid outlet of the fluidic transfer assembly via the fluidic transfer chamber. The primary source of pressurized treatment fluid is in fluidic communication with the fluid outlet of the fluidic transfer assembly via the fluidic transfer chamber. The helical mixing element comprises an interior treatment fluid passage and external injection ports. The fluid outlet of the fluidic transfer assembly is in fluidic communication with the external injection ports of the helical mixing element via the interior treatment fluid passage of the helical mixing element. The systems may be incorporated into methods for treating a viscous medium.

Abstract: A vehicle CO2 capture and utilization system includes a concrete mixer vehicle and a vehicle exhaust capture system. The concrete mixer vehicle comprises a vehicle exhaust and a mixer tank. The vehicle exhaust capture system is located onboard the concrete mixer vehicle. Additionally, the vehicle exhaust capture system includes one or more fluid pathways that fluidly couple the vehicle exhaust and the mixer tank.

Abstract: A vehicle CO2 capture and utilization system includes a concrete mixer vehicle and a vehicle exhaust capture system. The concrete mixer vehicle comprises a vehicle exhaust and a mixer tank. The vehicle exhaust capture system is located onboard the concrete mixer vehicle. Additionally, the vehicle exhaust capture system includes one or more fluid pathways that fluidly couple the vehicle exhaust and the mixer tank.

Abstract: A method for curing cementitious articles includes flowing dry steam and carbon dioxide (CO2) simultaneously into a curing chamber containing a cementitious article. A relative humidity within the curing chamber may be between about 50% and about 70% and a temperature within the curing chamber may be between about 50° C. and about 70° C. A dry steam and CO2 mixture with a CO2 concentration between 2.5 vol % and 40 vol % is provided in the curing chamber and the cementitious article is cured for a duration between about 4 hours and 16 hours. Cementitious products cured with the method may have a CO2 uptake of greater than 15 wt % and a mechanical strength at least 10% greater than a cementitious product cured only in dry steam or CO2.

Abstract: A vehicle CO2 capture and utilization system includes a concrete mixer vehicle and a vehicle exhaust capture system. The concrete mixer vehicle comprises a vehicle exhaust and a mixer tank. The vehicle exhaust capture system is located onboard the concrete mixer vehicle. Additionally, the vehicle exhaust capture system includes one or more fluid pathways that fluidly couple the vehicle exhaust and the mixer tank.