CIESC Journal ›› 2015, Vol. 66 ›› Issue (1): 449-454.DOI: 10.11949/j.issn.0438-1157.20140976

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Roles of varied radicals in NO oxidation by Fe2+/H2O2 system

ZHAO Haiqian1,2, GAO Jihui1, ZHOU Wei1, WANG Zhonghua2, WU Shaohua1   

  1. 1 College of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China;
    2 Institute of Civil Engineering & Architecture, Northeast Petroleum University, Daqing 163318, Heilongjiang, China
  • Received:2014-06-27 Revised:2014-08-26 Online:2015-01-05 Published:2015-01-05
  • Supported by:

    supported by the National Natural Science Foundation of China(51176043, 91434134, 51134015), Heilongjiang Science Funds for Youths (QC2014C047), Heilongjiang Province Department of Education Funds (12541093).

Fe2+/H2O2体系内各种自由基在氧化NO中的作用

赵海谦1,2, 高继慧1, 周伟1, 王忠华2, 吴少华1   

  1. 1 哈尔滨工业大学能源科学与工程学院, 黑龙江 哈尔滨 150001;
    2 东北石油大学土木建筑工程学院, 黑龙江 大庆 163318
  • 通讯作者: 高继慧
  • 基金资助:

    国家自然科学基金项目(51176043, 91434134, 51134015);黑龙江省青年科学基金项目(QC2014C047);黑龙江省教育厅项目(12541093)。

Abstract:

Fe2+/H2O2 system contains a variety of oxidizing free radicals, such as O2-·,·OH and HO2·. In this paper, the behaviors of O2-·, ·OH and HO2· played in NO oxidation by Fe2+/H2O2 system were investigated experimentally. The results demonstrated that the ability oxidizing NO of O2-· was weak at the experimental conditions adopted by this paper, while ·OH and HO2· were the main active species for NO oxidation in Fe2+/H2O2 system, and the role of ·OH was more important. Acceleration of generating radical rate could not only promote the ability oxidizing NO gas of Fe2+/H2O2 system, but also accelerated O2 generation rate. Only a small amount of ·OH and HO2· participate in NO oxidation. In the process of NO oxidation by Fe2+/H2O2 system, the rapid reaction between ·OH and HO2· was the major reason of for low utilization of H2O2 (invalid decomposition).

Key words: Fe2+/H2O2 system, radical, invalid decomposition, NO

摘要:

Fe2+/H2O2体系可分解产生多种氧化性自由基, 主要包括O2-·、·OH和HO2·。本文实验研究了O2-·、·OH及HO2·在Fe2+/H2O2体系氧化NO气体过程中的作用。结果表明:在本实验条件下, O2-·对NO气体的氧化作用不明显;·OH及HO2·是该体系氧化NO气体的主要活性物质, 其中·OH的氧化作用更大。加快自由基的生成速率可以增强Fe2+/H2O2体系对NO气体的氧化能力, 但O2的生成速率同时加快。只有少量·OH及HO2·参与NO的氧化, ·OH与HO2·之间的快速反应是Fe2+/H2O2体系氧化NO过程中H2O2利用率低的主要原因。

关键词: Fe2+/H2O2体系, 自由基, 无效分解, NO

CLC Number: