引用本文:
钟顺和, 黎汉生, 王建伟. CO2在Cu-Ni/V2O5-SiO2催化剂上的吸附与反应[J]. 应用化学,
1999, 16(6): 21-24.
Citation: Zhong Shunhe, Li Hansheng, Wang Jianwei. Chemisorption and Surface Reaction of CO2 on Cu-Ni/V2O5-SiO2 Catalyst[J]. Chinese Journal of Applied Chemistry, 1999, 16(6): 21-24.
Citation: Zhong Shunhe, Li Hansheng, Wang Jianwei. Chemisorption and Surface Reaction of CO2 on Cu-Ni/V2O5-SiO2 Catalyst[J]. Chinese Journal of Applied Chemistry, 1999, 16(6): 21-24.
CO2在Cu-Ni/V2O5-SiO2催化剂上的吸附与反应
摘要:
采用表面反应改性法制备了V2O5-SiO2(简称VSiO)表面复合物,用等体积浸渍法制备了VSiO担载的Cu-Ni双金属催化剂用IR和TPR技术研究了CO2在其表面上的吸附与反应性能.结果表明,CO2在Cu-Ni/VSiO催化剂上可形成线式吸附态、剪式吸附态和卧式吸附态;催化剂表面金属位M上的剪式吸附态CO2可与邻近的Lewis酸位Vn+作用形成CO2卧式吸附态M-(CO)-O→Vn+;这种卧式吸附态在一定温度(138℃)下可解离为M-CO和V-O-.
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关键词:
- 二氧化碳吸附
- / V2O5-SiO2复合氧化物
- / 双金属催化剂
- / 表面反应
English
Chemisorption and Surface Reaction of CO2 on Cu-Ni/V2O5-SiO2 Catalyst
Abstract:
The complex support of V2O5-SiO2(VSiO)wasprepared by a surface reaction.VsiO supported Cu-Ni catalyst was prepared by anisovolumic impregnation method.The adsorption states and sites of CO2 on the catalyst have been investigated by IR and TPD techniques.Results showed that there are three types of cmemical states of CO2 on the surface of the catalyst: linear,shearing and horizontal.The horizontal adsorption state M-(CO)-O→Vn+ is formed by shearingly adsorbed CO2 on the metal site(M) in coorperation with the adjacent Lewis acid site(Vn+) and can be dissociated into M-CO and V-O- at temperature about 138℃.
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