甲醇催化脱氢制甲酸甲酯反应中Cu－ZrO_2／SiO_2催化剂的特性

The character of Cu-ZrO_2/SiO_2 catalyst for dehydrogenation of methanol to methyl formate

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.