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首页> 外文期刊>Environmental Science & Technology >A Facile Method for in Situ Preparation of the MnO_2/LaMnO_3 Catalyst for the Removal of Toluene
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A Facile Method for in Situ Preparation of the MnO_2/LaMnO_3 Catalyst for the Removal of Toluene

机译：一种原位制备用于去除甲苯的MnO_2 / LaMnO_3催化剂的简便方法

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摘要

MO_x/ABO_3 is a promising catalyst for the high-efficiency removal of volatile organic compounds. However, this catalyst is limited on practical applications due to its complex synthesis procedure and high cost In this work, the MnO_2/LaMnO_3 catalyst was prepared in situ using a facile one-step method for the first time, in which partial La cations were selectively removed from three dimensionally chain-like ordered macro-porous (3DOM) LaMnO_3 material. After selective removal, the obtained MnO_2/LaMnO_3 sample expressed an excellent catalytic performance on toluene oxidation. Toluene could be completely oxidized into CO_2 and H_2O at 290 ℃ over the MnCVLaMnO_3 catalyst with a toluene/oxygen molar ratio of 1/100 and a space velocity of 120000 mL/(g h). In addition, the apparent activation energy value of MnO_2/LaMnO_3 was 57 kJ/mol, which was lower than those of other metal oxides catalysts. According to O_2-TPD and XPS results, it is concluded that the high catalytic performance of MnCVLaMnO_3 was mainly associated with the large amount of oxygen species and the excellent lattice oxygen mobility. MnO_2/LaMnO_3 is a promising catalyst for the practical removal of volatile organic compounds due to its high efficiency, good stability, low cost, and convenient preparation.
机译：MO_x / ABO_3是高效去除挥发性有机化合物的有前途的催化剂。然而，该催化剂由于其合成过程复杂，成本高而在实际应用中受到限制。在这项工作中，首次使用简便的一步法原位制备了MnO_2 / LaMnO_3催化剂，其中部分La阳离子被选择性地选择。从三维尺寸的链状有序大孔（3DOM）LaMnO_3材料中移除。选择性去除后，所得MnO_2 / LaMnO_3样品表现出优异的对甲苯氧化的催化性能。在MnCVLaMnO_3催化剂上，甲苯/氧气摩尔比为1/100，空速为120000 mL /（g h）时，甲苯可以在290℃下完全氧化为CO_2和H_2O。另外，MnO_2 / LaMnO_3的表观活化能值为57kJ / mol，低于其他金属氧化物催化剂。根据O_2-TPD和XPS结果，可以得出结论，MnCVLaMnO_3的高催化性能主要与大量的氧种类和优异的晶格氧迁移率有关。 MnO_2 / LaMnO_3具有效率高，稳定性好，成本低，制备方便等优点，是一种实用的去除挥发性有机化合物的催化剂。

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  • 来源
    《Environmental Science & Technology》 |2016年第8期|4572-4578|共7页
  • 作者

    Wenzhe Si; Yu Wang; Shen Zhao; Fangyun Hu; Junhua Li;

  • 作者单位

    State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, P. R. China;

    State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, P. R. China;

    State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, P. R. China;

    State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, P. R. China;

    State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, P. R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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