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对比研究了 Cu-ZSM-5粉末和原位合成的 Cu-ZSM-5/堇青石的水热稳定性与相应的分解 NO的催化活性 .发现经过 60 0～ 80 0℃水蒸气处理后 ,纯 Cu-ZSM-5粉末发生了明显的失活 ,而经过相同条件处理的 Cu-ZSM-5/堇青石活性变化不大 .XRD结果显示 ,整体式催化剂经水热处理后结晶度下降程度小于纯 Cu-ZSM-5粉末 .推测认为 ,原位合成样品中分子筛与堇青石载体的相互作用提高了催化剂结构的水热稳定性
The hydrothermal stability of Cu-ZSM-5 / cordierite prepared by in-situ synthesis of Cu-ZSM-5 powder and the corresponding catalytic activity of NO decomposition were investigated. The results showed that after 60 0 ~ 80 0 ℃ steam treatment, pure The activity of Cu-ZSM-5 / cordierite treated with the same conditions has little change.The results of XRD show that the degree of crystallinity reduction of the monolithic catalyst after hydrothermal treatment is less than that of the pure Cu -ZSM-5 powder.It is presumed that the interaction of the molecular sieve with the cordierite support in situ synthesis samples increases the hydrothermal stability of the catalyst structure