论文部分内容阅读
用红外光谱技术研究了室温至300℃时甲醇在Ni-K/Al_2O_3系催化剂上分解形成的吸附态。在Ni/Al_2O_3上形成了物理吸附甲醇、表面甲氧基、吸附一氧化碳和表面甲酸盐。除此以外,在Ni-K/Al_2O_3上还形成了一个稳定的一氧化碳吸附构型及表面碳酸氢盐和=配位碳酸盐。各种表面生成物的稳定性和生成量与催化剂中1K含量及温度之间的关系密切。另外,讨论了甲醇分解时在Ni-K/Al_2O_3系催化剂表面上发生的反应,确认甲醇分解的中间反应产物是表面甲氧基。
The adsorption state of methanol formed on Ni-K / Al 2 O 3 catalyst was studied by infrared spectroscopy at room temperature up to 300 ℃. On Ni / Al_2O_3, physical adsorption of methanol, surface methoxy groups, adsorption of carbon monoxide and surface formate were formed. In addition, a stable adsorption structure of carbon monoxide and surface bicarbonate and coordination carbonate were formed on Ni-K / Al 2 O 3. The stability and amount of formation of various surface products are closely related to the 1 K content and temperature in the catalyst. In addition, the reaction on the surface of Ni-K / Al 2 O 3 catalyst during methanol decomposition was discussed. It was confirmed that the intermediate reaction product of methanol decomposition was surface methoxy.