One Step Dimethyl Ether (DME) Synthesis from CO2 Hydrogenation over Hybrid Catalysts Containing Cu/ZnO/Al2O3 and Nano-Sized Hollow ZSM-5 Zeolites

The study has focused on the development of bifunctional catalytic materials for the direct DME synthesis from CO2/H-2. The industrial Cu/ZnO/Al2O3 is used as the copper based catalyst for the first step of the methanol synthesis from CO2/H-2. It will be combined with hollow nano-ZSM-5 zeolites with mesoporous shell as the acid catalyst of the second step the methanol dehydration to DME. The bifunctional materials will be tested in the direct DME synthesis from CO2/H-2 under the following conditions: T = 225 degrees C, p = 30 bar, H-2/CO2 = 3. Under our reaction conditions, CO was not observed, only the DME majority product (77.5%) and CH3OH (22.5%) were obtained.

Automated summary

The study focuses on developing bifunctional catalytic materials for the direct synthesis of dimethyl ether (DME) from CO2 and H-2. Industrial Cu/ZnO/Al2O3 is used as the catalyst for the first step in methanol synthesis from CO2 and H-2, and it is combined with hollow nano-ZSM-5 zeolites with mesoporous shell as the acid catalyst for the second step of methanol dehydration to DME. The bifunctional materials were tested under specific conditions and produced mainly DME (77.5%) and methanol (22.5%), without the presence of carbon monoxide.