Positive Effect of Ce Modification on Low-Temperature NH3-SCR Performance and Hydrothermal Stability over Cu-SSZ-16 Catalysts
نویسندگان
چکیده
Cu-exchanged SSZ-16 zeolite catalysts exhibit outstanding NH3-SCR activity, but their catalytic performance after hydrothermal treatments is not ideal. In order to improve the stability of Cu-SSZ-16, CuCex-SSZ-16 series were prepared via an ion exchange process, and effect Ce modification on was investigated. addition, increasing contents significantly improved stability, CuCe0.87-SSZ-16 showed best stability. The effects adding active species AFX framework studied by various characterization measurements. 27Al MAS NMR results reveal that can strengthen structural catalysts. Furthermore, combined XPS, H2-TPR, in situ DRIFTS confirm introduction markedly increases Cu2+-2Z species, contributing remarkable
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ژورنال
عنوان ژورنال: Catalysts
سال: 2023
ISSN: ['2073-4344']
DOI: https://doi.org/10.3390/catal13040742