Micro-/mesoporous copper-containing zeolite Y applied in $NH_3-SCR, DeNO_x$

The raw data relating to the characterisation of the physicochemical properties of zeolite Y prepared by a dense-gel method and subsequently modified either by treatment with diethylamine (DEA), sodium hydroxide (NaOH) or disodium ethylenediaminetetraacetate (Na2H2EDTA) or by sequential treatment (H4EDTA-NaOH or H4EDTA-NaOH-Na2H2EDTA). After the introduction of Cu2+ ions, the obtained materials were studied as catalysts for the selective catalytic reduction of NOx by NH3 (NH3-SCR, DeNOx). The catalytic data show a similar NO conversion for all Cu-containing catalysts up to 450 °C, independent of the introduced mesoporosity. Insights into the dynamics of NH3-SCR intermediates through rapid scan FT-IR shows that for Cu–Y, the rate-determining step is the formation of the mixed [Cu(O−)(NH3)n-1(NO)]2+ complexes, which initiate the NH3-SCR reaction.

本数据集包含通过浓凝胶法制备的Y型沸石（zeolite Y）的理化性质表征相关原始数据，该材料后续分别经二乙胺（DEA）、氢氧化钠（NaOH）、乙二胺四乙酸二钠（Na₂H₂EDTA）单独改性，或采用H₄EDTA-NaOH、H₄EDTA-NaOH-Na₂H₂EDTA分步改性工艺处理。向所得样品引入Cu²+离子后，将其作为NH₃选择性催化还原NOₓ（NH₃-SCR，DeNOₓ）反应的催化剂开展性能评价。催化测试数据显示，在450℃以下，所有含铜催化剂的NO转化率均相近，且与引入的介孔结构无关。通过快速扫描傅里叶变换红外光谱（FT-IR）对NH₃-SCR中间体的动力学行为进行解析后发现，对于Cu-Y沸石，其NH₃-SCR反应的决速步骤为[Cu(O⁻)(NH₃)ₙ₋₁(NO)]²+混合络合物的生成，该络合物可启动NH₃-SCR反应。