摘要
考察了常压和270℃时甲醇催化脱氢制取甲酸甲酯反应中Cu-ZrO2/Si4和Cu-ZrO/SiO4催化剂的活性和选择性,并对催化剂进行了表征.结果表明,Cu-ZrO/SiO4催化剂的反应性能优于Cu-ZrO/SiO2催化剂.X射线衍射分析表明,零价铜是催化活性中心.差热分析表明,ZrO2的加入缓和了Cu(NO3)2的热分解过程.程序升温还原实验表明,加入ZrO2后,降低了CuO的还原温度.根据上述实验结果,解释了ZrO2的助催化作用.
The activity and selectivity of catalysts Cu-ZrO2/SiO2 and Cu-ZnO/SiO2 for reaction of methanol dehydrogenation to methyl formate were exploed and compared at 270℃ and normal pressure. The results show that Cu-ZrO2/SiO2 is superior to Cu-ZnO/SiO. XRD results prove that Cu species are the activity sites. When ZrO2 is added. DTA results show that the decomposition of Cu(NO3)2 is deceleated and TPR results show that the reduction temperature of CuO is decreased by addition of ZrO2.Thus the promoter action of ZrO2 is explained.
出处
《复旦学报(自然科学版)》
CAS
CSCD
北大核心
1995年第3期344-349,共6页
Journal of Fudan University:Natural Science
基金
上海市自然科学基金
关键词
铜
催化剂
氧化锆
甲醇
脱氢
甲酸甲酯
copper
catalysts
zirconium oxide
promoter
methanol
dehydrogenation
methyl formate