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The enhanced K resistance of Cu-SSZ-13 catalyst for NH3-SCR reaction by the modification with Ce
Molecular Catalysis ( IF 3.9 ) Pub Date : 2021-01-13 , DOI: 10.1016/j.mcat.2021.111392
De-yu Guo , Rui-tang Guo , Chao-peng Duan , Yuan-zhen Liu , Gui-lin Wu , Yang Qin , Wei-guo Pan

Potassium has a deactivation effect on Cu-SSZ-13 catalyst for selective catalytic reduction of NO with NH3 (NH3-SCR). It was demonstrated that the modification of Cu-SSZ-13 catalysts by Ce could improve its K resistance. The characterization of NH3-TPD and H2-TPR suggested that the introduction of Ce on Cu-SSZ-13 could improve its surface acidity and redox ability. Moreover, the content of Cu2+ and chemisorbed oxygen were markedly restored under the situation that Ce and K elements were coexistent on catalyst surface. The synergetic effect between Ce and Cu might be the major reason for the great K resistance and the excellent SCR performance.



中文翻译:

Ce修饰增强Cu-SSZ-13 NH 3 -SCR反应的抗K性能。

钾对Cu-SSZ-13催化剂具有减活作用,用于用NH 3(NH 3 -SCR)选择性催化还原NO 。结果表明,铈对Cu-SSZ-13催化剂的改性可以提高其耐K性能。NH 3 -TPD和H 2 -TPR的表征表明,将Ce引入Cu-SSZ-13可以提高其表面酸度和氧化还原能力。此外,在催化剂表面上同时存在Ce和K元素的情况下,Cu 2+和化学吸附的氧的含量得以显着恢复。Ce和Cu之间的协同作用可能是K抗性和SCR性能优异的主要原因。

更新日期:2021-01-13
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