改进型铜基甲醇含成催化剂NC208的活性相谱学表征

利用XRD和FTIR等谱学方法,对改进型铜基联醇催化剂NC208和工业催化剂C207的活性相进行了谱学表征.实验结果表明,联醇铜基甲醇含成催化剂的活性中心可能是Cu_x⁰-Cu⁺-O-Zn²⁺/Al₂O₃-MOx添加少量金属氧化物助剂的改进型NC208催化剂工作表面Cu⁺活性位的浓度比Cu－Zn－Al三组份工业催化剂C207高;NC208催化剂能维持工作表面具有较大的Cu⁺/Cu0比,即维持较高的Cu＋价态稳定性,这与该催化剂的活性和热稳定性明显优于C207有着密切联系.

Spectroscopic Characterization of the Active Site of NC208 Modified Copper-based Catalyst for Methanol Synthesis

Spectroscopic characterization of the active base of an industrial catalysts and NC208 modlfied copper-based catalysts for methanol synthesis has been carried out by means of XRD and FTIR rnethods. The experimental results showed that active site on functioning copper-based catalysts for methanol synthesis is probably and that the surface concentration of Cu+-site on functioning NC208, prepared by adding small amount of the metal oxide MOx. to industrial catalyst C207, was higher than that of C207 catalyst, and that the surface of functioning NC208 catalyst had higher Cu+/Cu0 ratio and valence stability than that of C207. These pecullarities have close a relation with more persistent activity and higher thermal stability than modified NC208 catalyst.