Synthesis of Methanol from СО2 on Cu–Zn/xAl2O3–(1 – x)SiO2 Catalysts. Effect of Support Composition.

A comparative study of the catalytic properties of Cu–Zn catalysts on supports of various compositions in methanol synthesis by hydrogenation of CO₂ has been performed. The commercial adsorbents: Al₂O₃, Al₂O₃ with SiO₂ addition, SiO₂ with Al₂O₃ addition, and SiO₂ (all from Saint Gobain) were used as supports. All these catalysts were shown to be effective in the methanol synthesis. The highest methanol selectivity was observed for the sample with the Al₂O₃ support. In the temperature range of 170–210°C, the methanol selectivity for this catalyst was over 96%. The highest efficiency with respect to methanol, especially at temperatures above 210°C, was observed for the sample on the Al₂O₃ support with SiO₂ addition. [ABSTRACT FROM AUTHOR]