CO_2/H_2低温合成甲醇的研究

Study on Low-temperature Methanol Synthesis from CO_2/H_2

以CO2/H2为原料,Cu-Zn基催化剂,醇溶剂,低温低压(443 K、3.0 MPa)下合成甲醇.考察时间、温度、催化剂对反应的影响.结果表明,随反应时间的增加,甲醇的产量和选择性增加,随反应温度的增加,甲醇的产量和选择性也逐渐增加.当使用稀土元素La作为助剂时,并不能提高Cu-Zn基催化剂的活性,而稀土元素Y作为助剂,当使用n(Cu)/n(Zn)为1/1,且Y的摩尔分数为12.5%的Cu/ZnO/Y2O3催化剂进行甲醇合成反应时,CO2的转化率、甲醇的选择性和产量均高于使用Cu/ZnO催化剂.

The methanol was synthesized on Cu-Zn based catalysts at low-temperature and low-pressure from CO2/H2 using alcohol solvent.The effects of the time,temperature and catalysts on the reaction were studied.The results showed that the methanol yield and selectivity increased gradually with reaction time,and methanol yield and selectivity increased gradually with reaction temperature.The activity of the Cu-Zn based catalysts can not be increased by using rare-earth element La as additives,while the CO2 conversion,methanol selectivity and the yield were higher by using Cu/ZnO/Y2O3 catalyst with Cu/Zn mol ratio of 1/1 and Y loading of 12.5 % than the Cu/ZnO catalyst in low-temperature methanol synthesis reaction.