CO_2加氢合成甲醇铜基催化剂的还原研究

Studies on the Reduction of Cu-Based Catalysts for Methanol Synthesis from Hydrogenation of CO_2

关键词:  铜基催化剂,CO_2加氢,催化剂还原,甲醇合成

Key words:  reduction of catalys, Cu-based catalysts, hydrogenation of CO_2, methanol synthesis

摘要:

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。

Abstract:

The catalyts for methanol synthesis from CO2 were reduced by three kinds of metods which include H2 reduction,KBH4 reduction and alcohol reduction. This paper investigated the effect of above three methods on the structure and activity of Cu/ZnO catalysts