Ethylene glycol and ethanol synthesis from dimethyl oxalate hydrogenation on the Cu/ZnO/SiO2 catalysts

Ethylene glycol (EG) synthesis from dimethyl oxalate (DMO) hydrogenation is a sustainable method compared with the production by petrochemical technology. The Cu/ZnO/SiO₂ catalysts prepared by deposition precipitation method have been characterized by XRD, SEM, H₂-TPR, and N₂ physisorption. Under optimum reaction conditions, a DMO conversion of 100% and EG selectivity of 98% was obtained on the CuZn-5 catalyst. The present work also demonstrates a feasibility method to produce ethanol from DMO hydrogenation. On the catalyst of CuZn-15, the conversion of DMO can reach to 99% with the ethanol selectivity of 64% under the optimized reaction conditions.