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

doi:10.11949/j.issn.0438-1157.20140976

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 Haiqian^1,2, GAO Jihui¹, ZHOU Wei¹, WANG Zhonghua², WU Shaohua¹

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 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

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:

X511

ZHAO Haiqian, GAO Jihui, ZHOU Wei, WANG Zhonghua, WU Shaohua. Roles of varied radicals in NO oxidation by Fe²⁺/H₂O₂ system[J]. CIESC Journal, 2015, 66(1): 449-454.

赵海谦, 高继慧, 周伟, 王忠华, 吴少华. Fe²⁺/H₂O₂体系内各种自由基在氧化NO中的作用[J]. 化工学报, 2015, 66(1): 449-454.

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

Fe²⁺/H₂O₂体系内各种自由基在氧化NO中的作用

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