Influence of Reaction Temperature on CO2-to-methanol Hydrogenation over MZrOx (M = Al, Mn, Cu, Zn, Ga, and In)

To open up the possibility of synthesizing useful substances from CO2, we have developed new catalysts that hydrogenate CO2 to methanol with high yield at 300 degrees C and higher. In this study, methanol synthesis via CO2 hydrogenation at 250-350 degrees C and 10 bar was investigated using Zr-based metal oxide catalysts, MZrOx (M = Al, Mn, Cu, Zn, Ga, and In). The different metals (M) determined the suitable reaction temperature wherein the maximum yield of methanol was obtained. CuZrOx was a suitable catalyst for low-temperature methanol synthesis because the yield decreased with increasing reaction temperature from 250 degrees C to 350 degrees C. In contrast, ZnZrOx, GaZrOx, and InZrOx were suitable for methanol synthesis at 300 degrees C and higher. In particular, ZnZrOx afforded the highest yield of methanol (60 mL(STP) h(-1) g(-1) at 300 degrees C) among the prepared MZrOx catalysts.

Automated summary

New catalysts have been developed to hydrogenate CO2 to methanol at high temperatures, with different metals affecting the yield of methanol. Among the catalysts studied, ZnZrOx showed the highest methanol yield at 300 degrees C.