Catalytic Reduction of Carbon Dioxide on Commercial Catalysts

The applicability of some commercial catalysts in the conversion of carbon dioxide into syngas is estimated. Catalysts based on Cu and transitional metals (Fe, Ni, Co) and used in large-capacity hydrogenation and syngas technology are selected for study. They include NIAP-03-01 (steam conversion of hydrocarbon gases), NIAP-06-06 (low-temperature CO conversion), AmoMax 10 (synthesis of ammonia), and Со-Al₂O₃/SiO₂ (synthesis of hydrocarbons). The catalysts are tested in the reduction of СО₂ using the reverse water gas shift (RWGS) reaction. Cu-containing catalyst NIAP-06-06 is shown to have the highest activity and selectivity in the reduction of СО₂, with 97% equilibrium in the RWGS reaction being reached at GHSV = 32 000 h⁻¹, Н₂/СО₂ = 2, and temperatures of 500–800°C. The possibility is shown of obtaining syngas with the composition required for the synthesis of hydrocarbons and methanol by changing the parameters of СО₂ reduction (temperature, Н₂/СО₂ ratio).