Self-Propagating High-Temperature Synthesis of Co/WxC and CoCu/WxC Composites as Catalysts for CO2 Hydrogenation and Deep Oxidation of CO and Propane

Using self-propagating high-temperature synthesis with exothermic thermite-type mixtures, CoAl/WxC and CoCuAl/WxC composites were obtained. Based on ground composites, catalysts with a metallic active phase were prepared by aluminum leaching and stabilization. Their physicochemical characteristics and catalytic properties in CO2 hydrogenation and deep oxidation of CO and hydrocarbons were studied. The Co/WxC catalyst demonstrated 100% CO conversion at 250°C, and the maximum achieved propane conversion was 91% at 400°C. In the hydrogenation reaction, the maximum CO2 conversion was reached at 350°C and amounted to 37%, while the methane yield fed passed CO2 reached 32%.