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Insight into the enhanced performance of toluene removal from simulated flue gas over Mn-Cu oxides modified activated coke

机译:深入了解从Mn-Cu氧化物改性的激活焦炭中从模拟烟道气中取出甲苯去除的增强性能

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摘要

A series of bimetallic oxides of manganese and copper with different loading of copper loaded on activated coke (MnxCuy/AC) were synthesized by ultrasound-assisted equivalent volume impregnation method for toluene oxidation in simulated flue gas at 150-300 degrees C. The physicochemical properties of samples have been investigated by means of XRD, SEM, BET, XPS, H-2-TPR and DRIFT. Mn6Cu5/AC exhibited the enhanced toluene removal efficiency (99.38%) at 270 degrees C, as well as satisfactory reusability and durability. The excellent activity of Mn6Cu5/AC was connected with the highly uniform distribution of active components and the larger specific surface area, which confirmed the synergistic interaction between MnOx and CuOx, thus leading to the stronger reducibility and the good oxygen mobility. In addition, SO2 and NO played a hindering role due to the competitive adsorption of active sites in pure N-2, whereas the negative effect would be reduced by the introduction of O-2. Besides, the influence of H2O on toluene removal was complex. Moreover, the reaction process obtained from DRIFT indicated that toluene can be rapidly adsorbed and activated to form the benzaldehyde and maleic anhydride species on Mn6Cu5/AC, and finally be further oxidized into CO2 and H2O. Finally, the mechanism of toluene oxidation over Mn6Cu5/AC was proposed.
机译:通过超声辅助等效体积浸渍方法合成了在150-300摄氏度下的甲苯氧化的甲苯氧化的甲苯氧化等载荷的锰和铜的一系列锰和铜的锰和铜的一系列二通氧化物。通过XRD,SEM,BET,XPS,H-2-TPR和漂移研究了样品。 MN6CU5 / AC在270摄氏度下表现出增强的甲苯去除效率(99.38%),以及令人满意的可重用性和耐用性。 Mn6Cu5 / Ac的优异活性与活性组分的高度均匀分布和较大的比表面积连接,这证实了Mnox和CuOx之间的协同相互作用,从而导致更强的还原性和良好的氧气迁移率。此外,SO2和NO由于纯N-2中活性位点的竞争吸附而发挥了障碍作用,而通过引入O-2将减少负面影响。此外,H 2 O对甲苯去除的影响是复杂的。此外,从漂移中获得的反应过程表明,可以快速吸附并活化甲苯,以在MN6CU5 / Ac上形成苯甲醛和马来酸酐物质,并最终进一步氧化成CO 2和H 2 O。最后,提出了甲苯氧化在MN6CU5 / Ac上的机制。

著录项

  • 来源
    《Fuel》 |2020年第15期|118099.1-118099.11|共11页
  • 作者单位

    Hunan Univ Coll Environm Sci & Engn Changsha 410082 Peoples R China|Hunan Univ Key Lab Environm Biol & Pollut Control Minist Educ Changsha 410082 Peoples R China;

    Hunan Univ Coll Environm Sci & Engn Changsha 410082 Peoples R China|Hunan Univ Key Lab Environm Biol & Pollut Control Minist Educ Changsha 410082 Peoples R China;

    Hunan Univ Coll Environm Sci & Engn Changsha 410082 Peoples R China|Hunan Univ Key Lab Environm Biol & Pollut Control Minist Educ Changsha 410082 Peoples R China;

    Hunan Univ Coll Environm Sci & Engn Changsha 410082 Peoples R China|Hunan Univ Key Lab Environm Biol & Pollut Control Minist Educ Changsha 410082 Peoples R China;

    Hunan Univ Coll Environm Sci & Engn Changsha 410082 Peoples R China|Hunan Univ Key Lab Environm Biol & Pollut Control Minist Educ Changsha 410082 Peoples R China;

    Hunan Univ Coll Environm Sci & Engn Changsha 410082 Peoples R China|Hunan Univ Key Lab Environm Biol & Pollut Control Minist Educ Changsha 410082 Peoples R China;

    Hunan Univ Coll Environm Sci & Engn Changsha 410082 Peoples R China|Hunan Univ Key Lab Environm Biol & Pollut Control Minist Educ Changsha 410082 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Toluene; Activated coke; Mn-Cu oxides; Simulated flue gas; Catalytic removal;

    机译:甲苯;活性焦炭;Mn-Cu氧化物;模拟烟气;催化去除;

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