Influence of the Zn/Zr ratio in the support of a copper-based catalyst for the synthesis of methanol from CO2

CuO-ZnO-ZrO2 catalysts were synthetized by co-precipitation synthesis. Copper content in was kept constant (30 wt% of Cu °) and ZnO gradually substituted ZrO2 the support to have a greater understanding support’s effect find optimal ZnO/ZrO2 ratio. These fully characterized then tested methanol synthesis via CO2 hydrogenation. The effects reaction temperature GHSV on catalytic behavior investigated. mix characterization results predicted optimum that is composed 50 with higher metallic copper surface area dispersion. Surprisingly obtained for 30Cu-ZZ66/34 catalyst, whose 66 34 ZrO2. This catalyst presented good conversion (19.6%) selectivity (50%), leading productivity 725 gMeOH kgCata?1 h?1 at 280 °C, bar 25,000 (STP). Finally, determining factor best activity not Zn/Zr To hydrogenation other parameters should be considered as well. They are: nature state species over composite support; homogeneity final sample, particles size, number ZnO-ZrO2 interactions. perfect combination them all plays an important role determination copper-based from CO2.