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首页> 美国卫生研究院文献>ACS Omega >Synthesis of Both Powdered and Preformed MnOx–CeO2–Al2O3 Catalystsby Self-Propagating High-Temperature Synthesisfor the Selective Catalytic Reduction of NOx with NH3
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Synthesis of Both Powdered and Preformed MnOx–CeO2–Al2O3 Catalystsby Self-Propagating High-Temperature Synthesisfor the Selective Catalytic Reduction of NOx with NH3

机译：粉末和预成型的MnOx–CeO2–Al2O3催化剂的合成通过自蔓延高温合成NH3选择性催化还原NOx的合成

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摘要

MnOx–CeO2–Al2O3 powdered and preformed catalysts were prepared through self-propagating high-temperature synthesis (SHS) and impregnation methods. Compared to the traditional impregnation method, the SHS method has a shorter catalyst preparation cycle and simpler preparation process. The characterization results showed that mixed crystals of cerium, aluminum, and manganese oxides were formed through the SHS method, the binding energy of Mn4+ increased, and the active components were distributed uniformly. The MnOx–CeO2–Al2O3 powdered catalyst had an extensive pore structure, with a Brunauer–Emmett–Teller surface area of approximately 136 m2/g, a pore volume of approximately 0.17 cm3/g, and an average pore diameter of approximately 5.1 nm. Furthermore, the MnOx–CeO2–Al2O3 powdered catalyst achieved a NOx conversion higher than 80% at 100–250 °C. Coating liquids with identical metal-ion concentrations were prepared using the catalysts, and the preformed catalyst obtained through the SHS method had a higher loading capacity after one coating. The MnOx–CeO2–Al2O3 preformed catalyst achieved a NOx conversion higher than 70% at 200–350 °C.
机译：MnOx–CeO2–Al2O3粉末状和预制催化剂是通过自蔓延高温合成（SHS）和浸渍方法制备的。与传统的浸渍法相比，SHS法的催化剂制备周期更短，制备工艺更简单。表征结果表明，通过SHS法形成了铈，铝，锰氧化物的混合晶体，Mn 4 + 的结合能增加，活性成分均匀分布。 MnOx–CeO2–Al2O3粉末状催化剂具有广泛的孔结构，Brunauer–Emmett–Teller表面积约为136 m 2 / g，孔体积约为0.17 cm 3 < ，并且平均孔径为约5.1nm。此外，MnOx–CeO2–Al2O3粉末状催化剂在100–250°C下的NOx转化率高于80％。使用催化剂制备具有相同金属离子浓度的涂布液，通过SHS法获得的预成型催化剂在一次涂布后具有较高的负载能力。 MnOx–CeO2–Al2O 3 预制催化剂在200–350°C下实现的NO x 转化率高于70％。

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