One‐Step Preparation and Characterization of Cu‐Y Zeolite Denitration Catalyst

ABSTRACT

Cu‐TETA complexes generated from triethylenetetramine and CuSO ₄ ·5H ₂ O were used to synthesize Cu‐Y catalysts using a one‐step hydrothermal synthesis method. For comparison, Cu‐Y‐IE was synthesized using a traditional ion exchange method. XRD, SEM, UV–Vis, XPS, NH ₃ ‐TPD, and H ₂ ‐TPR characterization were used to characterize these synthesized catalysts, as well as tested for NH ₃ ‐SCR activity. It was found that Cu‐Y catalyst synthesized by one‐step hydrothermal synthesis had higher catalytic activity, especially low‐temperature activity than Cu‐Y‐IE catalyst due to the higher Cu ⁺ content and appropriate acid sites. The NO _x conversion remained above 95% in the operating temperature range of 125∼375 °C.