Shuying Ning , Muhammad Kashif , Wenyi Deng , Bingtao Zhao , Yaxin Su
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引用次数: 0
摘要
采用水热法合成了基于金属有机框架（MOFs）的载体 MIL-100(Fe)，并通过湿法浸渍法将 Ni 支持在 MIL-100(Fe) 上，制备了用于 C3H6 选择性催化还原 NO（C3H6-SCR）的催化剂。镍的加入大大提高了 C3H6-SCR 的反应活性。275 °C 时，MIL-100(Fe) 的 NO 转化率为 74.5%，而 5.8%Ni/MIL-100(Fe) 的 NO 转化率为 100%，N2 选择性为 100%。原位 DRIFTS 证明，NO2-/NO3- 与 CxHyOz 物质之间的相互作用产生了中间异氰酸酯（R-NCO），并根据 DRIFTS 结果提出了反应途径，以了解其机理。
Reactivity of Ni-modified MIL-100(Fe) catalysts for C3H6-SCR and reaction mechanism
Metal-organic frameworks (MOFs)-based carrier, MIL-100(Fe), was synthesized by hydrothermal method and Ni was supported on the MIL-100(Fe) by wet impregnation method to prepare the catalysts for selective catalytic reduction of NO with C3H6 (C3H6-SCR). The addition of Ni significantly improved the reactivity of C3H6-SCR. At 275 °C, the NO conversion of MIL-100(Fe) was 74.5%, whereas the NO conversion of 5.8%Ni/MIL-100(Fe) with 100% N2 selectivity was 100%. The in-situ DRIFTS prove that the interaction between NO2−/NO3− and CxHyOz substances generated intermediate isocyanates (R-NCO), and the reaction pathway was proposed based on the DRIFTS results to understand the mechanism.
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