Methanol and Dimethyl Ether Synthesis From CO_2+H_2

摘要

To develop a way of highly effective conversion of carbon dioxide into useful products, the simultaneous synthesis methanol and dimethyl ether from carbon dioxide hydrogenation have been investigated in comparison with conventional methanol synthesis. For the methanol synthesis, the ternary mized oxide catalyst (CuO/ZnO/al_2O_3) was used and for the co-synthesis of methanol and dimethyl ether, silica-alumina was mixed with the methanol synthesis catalyst to be a hybrid catalyst. When the forward reaction of the methanol synthesis is limited by chemical equilibrium, the co-synthesis of methanol and dimethyl ether plays a very important role in alleviating the limitation. The results show that the co-synthesis provides much higher per-pass yield than methanol synthesis even at very short contact time. As a consequence, the co-synthesis of methanol and dimethyl ehter clearly provides more effective way to convert CO_2 to useful products than the methanol synthesis.