第二金属对Co/SiO2加氢催化剂结构和性能的影响

催化学报 , 2012, 33(10): 1642-1649. doi: 10.1016/S1872-2067(11)60434-8

第二金属对Co/SiO2加氢催化剂结构和性能的影响

薛晶晶 ^1, , 崔芳 ^2, , 黄志威 ^3, , 左建良 ^4, , 陈静 ^5, , 夏春谷 ^6,

1.中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州730000;中国科学院研究生院,北京100049

2.中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州,730000

3.中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州,730000

4.中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州730000;中国科学院研究生院,北京100049

5.中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州,730000

6.中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州,730000

基金项目: This work was financially supported by the National Natural Science Foundation of China(21133011) 国家自然科学基金(21133011)

关键词：钴 , 金属添加物 , 结构 , 乳酸酯 , 氢化

Effect of Metal Additives on Structure and Properties of a Co/SiO2 Hydrogenation Catalyst

Keywords： cobalt , metal additive , structure , ethyl lactate , hydrogenation

通过考察Co/SiO2催化剂中活性组分的结构变化及其催化乳酸酯液相氢化反应结果,来研究第二金属添加物对催化剂结构及其催化性能的影响.结果表明,随着金属添加物的加入双金属催化剂中金属Co的表面电子性质以及分散度不断变化,而Co物种颗粒粒径不断减小,因此Co物种和载体SiO2间相互作用不断增强,从而降低Co还原度.乳酸酯氢化反应结果表明,催化剂中活性组分的颗粒大小及其比表面积以及Co物种的还原度和分散度均影响其氢化反应的活性.

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