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采用程序升温脱附 (TPD)方法 ,对液相合成甲醇和甲酸甲酯铜基催化剂吸附氢气、一氧化碳、甲醇和甲酸甲酯后的脱附行为进行了考察 ,采用程序升温还原 (TPR)方法 ,对催化剂在氢气气氛中的还原行为进行了考察。结果表明 ,催化活性高的催化剂 ,其氢气的脱附温度一般也较低。氢气和一氧化碳的吸附强度对于合成反应没有显著的影响。脱附活化能计算表明具有较小甲酸甲酯脱附活化能的催化剂 ,其活性较高。使用过的和经过还原的催化剂 ,TPR峰向高温段移动。铜的价态在 +1价附近的催化剂活性较高
The desorption behavior of hydrogen and carbon monoxide, methanol and methyl formate in liquid phase synthesis of copper and copper formate catalysts was investigated by temperature programmed desorption (TPD). The temperature programmed reduction (TPR) The reduction behavior of the catalyst in hydrogen atmosphere was investigated. The results show that the high catalytic activity of the catalyst, the hydrogen desorption temperature is generally lower. The adsorption strength of hydrogen and carbon monoxide has no significant effect on the synthesis reaction. The desorption activation energy calculation shows that the catalyst with the smaller activation energy of desorption of methyl formate has higher activity. The spent and reduced catalyst moves the TPR peak to a higher temperature. The valence state of copper in the vicinity of the +1 price of catalyst activity higher