New bifunctional catalyst for direct Synthesis of dimethyl ether

摘要

A series of Cu-ZnO-ZrO_2/HZSM-5 and promoted Cu-ZnO- ZrO_2/HZSM-5 catalysts prepared by a "coprecipitating sedimentation" Method exhibit high catalytic activities of the hydrogenation of carbon Oxides and high selectivities for dimethyl ether. Among them, Mg-(Cu-ZnO- ZrO_2)/V-HZSM-5 has the best catlytic activity: the conversion of CO is 91.4/100, the selectivity to dimethyl ether is 84.6/100. In addition, Cu-ZnO- ZrO_2/HZSM-5 catalyst has excellent performances for CO_2 hydrogenation to Dimethyl ether: the conversion of CO_2 is 35/100, the selectivity to dimethyl Ether is 60.1/100.