The Ce-Cu-SAPO-18 samples were prepared by the ion exchange method. Physicochemical properties of the samples were systematically characterized by a number of analytical techniques, and Ce doping and hydrothermal temperature effects on NH₃-SCR activity of Cu-SAPO-18 were also investigated. The results show that doping of Ce increased NH₃-SCR activity and hydrothermal stability of the Cu-SAPO-18 sample. After Ce doping, a more amount of the isolated Cu²⁺ ions entered the D6R and the catalyst structure was more stable. The structure and catalytic activity of Ce-Cu-SAPO-18 remained almost intact after hydrothermal aging at 650 °C. After hydrothermal aging at 850 °C, however, the structure of Ce-Cu-SAPO-18 was greatly destroyed, and its catalytic activity declined remarkably. The high-temperature hydrothermal aging treatment led to decreases in amount of the isolated Cu²⁺ ions and acidic sites, destroying in the zeolitic structure, and drop in NH₃-SCR activity.

通过离子交换法制备了Ce-Cu-SAPO-18样品。通过多种分析技术系统地表征了样品的理化性质，并研究了Ce掺杂和水热温度对Cu-SAPO-18 NH ₃ -SCR活性的影响。结果表明，Ce的掺杂增加了Cu-SAPO-18样品的NH ₃ -SCR活性和水热稳定性。Ce掺杂后，更多的分离出的Cu ²⁺离子进入D6R，催化剂结构更加稳定。在650°C水热老化后，Ce-Cu-SAPO-18的结构和催化活性几乎保持不变。然而，在850°C水热老化后，Ce-Cu-SAPO-18的结构被大大破坏，其催化活性显着下降。高温水热老化处理导致分离的Cu ²⁺离子和酸性位点的数量减少，沸石结构破坏，并且NH ₃ -SCR活性下降。