【摘要】 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更多还原

【Abstract】 The hydrothermal stability and catalytic activities of powdery Cu ZSM 5 and monolithic Cu ZSM 5/cordierite synthesized by in situ method for NO decomposition were studied comparatively. After the thermal treatment at 600~800℃, the loss of activity on the powdery Cu ZSM 5 was obvious while the in situ synthesized monolithic Cu ZSM 5/cordierite was more stable under the same experimental conditions. From the results of XRD, the loss of zeolite crystallite of the monolithic catalyst was slighter than of pure ZSM 5. It was supposed that the interaction of zeolites and substrate might exist and could improve the hydrothermal durability of the catalyst.更多还原