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用XRD和EXAFS方法,通过对二元系(CuO-ZnO)及三元系(CuO-ZnO/γ-Al_2O_3)催化剂的比较分析,研究了CuO、ZnO和Cu的晶粒度变化以及γ-Al_2O_3的作用;通过对二元系及三元系催化剂氧化态、还原态和用后态的比较分析,研究了Cu和ZnO晶粒度变化以及催化剂的失活机理.
The XRD and EXAFS methods were used to investigate the grain size changes of CuO, ZnO and Cu and the effects of γ-Al_2O_3 on CuO-ZnO and CuO-ZnO / γ-Al_2O_3 catalysts. The effects of the grain size of Cu and ZnO and the deactivation mechanism of the catalyst were studied through the comparative analysis of the oxidation state, the reduction state and the post-use state of binary and ternary catalysts.