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首页> 外文期刊>Environmental Science & Technology >Effects of Precursor and Sulfation on OMS-2 Catalyst for Oxidation of Ethanol and Acetaldehyde at Low Temperatures
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Effects of Precursor and Sulfation on OMS-2 Catalyst for Oxidation of Ethanol and Acetaldehyde at Low Temperatures

机译：前驱体和硫化对OMS-2催化剂在低温下氧化乙醇和乙醛的影响

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摘要

Volatile organic compounds (VOCs) emitted from many industrial processes and transportation activities are major organic pollutants in the atmosphere and toxic to human health. Octahedral molecular sieve (OMS-2) catalysts with different precursors and sulfate-acidified OMS-2 catalysts were synthesized using refluxing methods. The catalysts were investigated on complete oxidation of ethanol and acetaldehyde, and both demonstrated good reactivity. However, acidification resulted in a decrease in activity. OMS-2 catalyst using MnSO_4 as precursor exhibited the best catalytic performance and, thus, was selected for catalyst deactivation by sulfur dioxide. The results of this study suggested that the Mn-O bond of OMS-2 catalysts was the main determinant of the catalytic activity toward oxygenated VOC oxidation and weaker acid sites benefited higher acetaldehyde selectivity. Catalyst deactivation resulted from a strong but slow chemical interaction between the Mn-O bond and sulfur dioxide, probably forming manganese sulfate.
机译：许多工业过程和运输活动中排放的挥发性有机化合物（VOC）是大气中的主要有机污染物，对人体健康有毒。采用回流法合成了具有不同前体的八面体分子筛（OMS-2）催化剂和硫酸盐酸化的OMS-2催化剂。研究了乙醇和乙醛完全氧化的催化剂，两者均显示出良好的反应活性。但是，酸化导致活性降低。使用MnSO_4作为前体的OMS-2催化剂表现出最佳的催化性能，因此被选择用于二氧化硫使催化剂失活。这项研究的结果表明，OMS-2催化剂的Mn-O键是对氧化的VOC氧化的催化活性的主要决定因素，较弱的酸位有助于提高乙醛的选择性。 Mn-O键与二氧化硫之间强烈但缓慢的化学相互作用导致催化剂失活，可能形成了硫酸锰。

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  • 来源
    《Environmental Science & Technology》 |2010年第11期|P.4282-4287|共6页
  • 作者

    RENHU WANG; JUNHUA LI;

  • 作者单位

    Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China;

    rnDepartment of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Beijing 100084, 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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