论文部分内容阅读
采用表面反应改性法 ,制备了 Zr O2 - Si O2 (Zr Si O)表面复合物 ;用等体积浸渍法制备了 Zr Si O担载的 Cu-Ni双金属催化剂 .用 IR和 TPD技术 ,研究了 CO2 在其表面上的化学吸附与反应性能 .实验结果表明 ,在 Cu- Ni/Zr Si O催化剂上 CO2 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 Zrn+作用 ,形成 CO2 卧式吸附态 M- (CO) - O Zr4+ ;该卧式吸附态在一定温度(142℃ )下可解离为 M- CO和 Zr- O- .Zr- O- 具有良好的选择氧化性能
Zr O 2 -SiO 2 (ZrSiO) surface composites were prepared by the surface reaction modification method. Cu-Ni bimetallic catalysts supported by ZrSi O were prepared by the same volume impregnation method. The chemical adsorption and reactivity of CO2 on its surface were investigated.The experimental results show that CO2 can form linear adsorption state, scission adsorption state and horizontal adsorption state on Cu-Ni / ZrSiO catalyst. The surface metal M The sorbed CO2 on scion can interact with the adjacent Lewis acid site Zrn + to form the horizontal adsorbed M- (CO) - O Zr4 +. The horizontal sorption state can be dissociated to M - CO and Zr-O- .Zr- O- has good selective oxidation properties