焙烧温度对合成低碳醇用Cu/Mn/Ni/ZrO2催化剂性能的影响

 研究了焙烧温度对合成低碳醇用Cu／Mn／Ni／ZrO2催化剂结构及催化性能的影响．随着焙烧温度的升高，催化剂的催化活性和产物分布都发生较大的变化．催化剂在较低的温度下焙烧，低温下反应液相产物的分布符合S－F方程；反应温度升高时，液相产物中主要是甲醇和异丁醇；在高温下焙烧的催化剂，其催化活性较低，但即使在较低的反应温度下，异丁醇在液相高级醇（C2＋OH）中也是主要的产物．结合其他的一些反应结果与XRD，BET，TPR及EXAFS等表征结果，认为焙烧温度使催化剂的结构发生了较大的变化，进而影响催化剂各组分之间的相互作用，从而使催化剂对合成低碳醇反应表现出不同的催化性能．

Effect of Calcination Temperature on Cu/Mn/Ni/ZrO2 Catalyst for Synthesis of Higher Alcohols

A new catalyst for synthesis of higher alcohols was developed in our laboratory using Ni modified Cu/Mn/ZrO 2 catalyst. The effect of calcination temperature on the catalytic performance and the structure of the catalyst was investigated. Both the reaction activity and the selectivity for higher alcohols on Cu/Mn/Ni/ZrO 2 catalyst were greatly influenced by the calcination. The catalyst calcined at lower temperatures showed high activity for the synthesis reaction. In this case, the product distribution obeyed the S F equation at low reaction temperatures while changed to iso butanol at higher reaction temperatures. For the catalyst calcined at higher temperatures, the activity was low, but the C 2+ OH in the product was mainly iso butanol even at low reaction temperatures. Copper could be well dispersed at lower calcination temperatures, then sintered with the calcination temperature increasing. This was clarified by using XRD, BET, TPR and EXAFS techniques. Thus the interaction between the components in Cu/Mn/Ni/ZrO 2 catalyst changed, which resulted in its different catalytic performance.