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首页> 外文期刊>Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications >Homogeneous introduction of CeOy into MnOx-based catalyst for oxidation of aromatic VOCs
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Homogeneous introduction of CeOy into MnOx-based catalyst for oxidation of aromatic VOCs

机译：Ceoy均匀引入Mnox基催化剂氧化芳烃催化剂

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摘要

3MnO(x)-1CeO(y) (3Mn1Ce), a binary oxide with stoichiometric ratio of Mn/Ce = 3, is synthesized via hydrolysis driving redox. Compared to MnO2, CeO2, Cop-3Mn1Ce and Mixed-3Mn1Ce, the 3Mn1Ce catalyst exhibits better catalytic activity for toluene oxidation, which could be ascribed to higher concentration of active lattice oxygen, and better low-temperature reducibility, as well as homogeneous dispersion. In the test of substrate applicability, 3Mn1Ce displays good performances in the removal of benzene, o-xylene and chlorobenzene at moderate temperature. The application of high WHSV of 240000 mL/(g h) confirms the 3Mn1Ce catalyst still remains high efficiency to diminish toluene, giving the temperature at 280 degrees C for complete mineralization. A set of experiments under simulated realistic exhaust conditions demonstrate that 3Mn1Ce is a robust catalyst with high activity to oxidize mixed aromatic VOCs (BTX and chlorobenzene), satisfied endurability to high humidity (above 10-20 vol.% water) and good tolerance to severe change of reaction temperature. With characterization of XRD and TPR, the high performance is related to the homogeneous introduction of Ce resulting in higher structural stability and reversible reducibility. Moreover, the inner principle for oxidation of VOCs is revealed by comprehension of kinetic study.
机译：3MnO（X）-1CEO（Y）（3mN1CE），通过水解驱动氧化还原合成具有Mn / Ce = 3的化学计量比的二进制氧化物。与MnO2，CeO2，Cop-3Mn1CE和混合-3Mn1CE相比，3Mn1CE催化剂表现出更好的甲苯氧化催化活性，这可以归因于更高的活性晶格氧浓度，更好的低温还原性，以及均匀的分散体。在基板适用性的试验中，3Mn1CE在中等温度下在去除苯，O-二甲苯和氯苯中显示出良好的性能。高WHSV的340000ml /（g h）的施加证实3mn1ce催化剂仍然仍然高效率来减少甲苯，以280℃的温度为完全矿化。在模拟的现实废气条件下的一组实验表明，3Mn1Ce是具有高活性的稳健催化剂，以氧化混合芳族VOC（BTX和氯苯），满意为高湿度（10-20体积％的水）和对严重的良好耐受性和良好的耐受性反应温度的变化。随着XRD和TPR的表征，高性能与CE的均匀引入有关，导致结构稳定性更高，可逆的还原性。此外，通过理解动力学研究，揭示了VOC氧化的内部原理。

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