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本文探讨了三种还原法（H2还原法、KBH4还原法、乙醇还原法）对CO2加氢合成甲醇Cu／ZnO催化剂结构及CO2加氢合成甲醇活性的影响。实验结果表明：催化剂经KBH4还原后，部分铜物种被还原成金属铜，同时带入了K+，对CO2加氢合成甲醇反应影响很大；催化剂经高压釜乙醇处理后，铜物种全部被还原成金属铜，且晶粒很大，在ZnO上分散性差，对CO2加氢合成甲醇反应影响很大；催化剂经3％H2＋N2还原后，铜在ZnO上分散性较好，有利于CO2加氢合成甲醇反应。
In this paper, the effects of three reduction methods (H2 reduction, KBH4 reduction and ethanol reduction) on the structure of Cu / ZnO catalyst for CO2 hydrogenation to methanol and the activity of methanol for CO2 hydrogenation were discussed. The experimental results showed that after the catalyst was reduced by KBH4, some copper species were reduced to metallic copper and K + was added simultaneously, which greatly influenced the reaction of CO2 hydrogenation to methanol. After the catalyst was treated with ethanol in autoclave, all copper species were reduced to Metal copper with large grain size, poor dispersibility on ZnO and great influence on the reaction of CO2 hydrogenation to methanol. After the catalyst is reduced by 3% H2 + N2, copper has good dispersibility on ZnO, which is good for CO2 hydrogenation to synthesize methanol reaction.