Fe(II)/H2O2体系氧化NO主要活性物质及自由基无效消耗路径

doi:10.11949/j.issn.0438-1157.20171274

化工学报 ›› 2018, Vol. 69 ›› Issue (5): 2250-2254.DOI: 10.11949/j.issn.0438-1157.20171274

Fe(II)/H₂O₂体系氧化NO主要活性物质及自由基无效消耗路径

赵海谦¹, 刘城昊¹, 周伟², 王忠华¹, 齐晗兵¹, 高继慧²

1. 东北石油大学土木建筑工程学院, 黑龙江大庆 163318;
2. 哈尔滨工业大学能源科学与工程学院, 黑龙江哈尔滨 150001

收稿日期:2017-09-19 修回日期:2017-12-13 出版日期:2018-05-05 发布日期:2018-05-05
通讯作者: 齐晗兵
基金资助:
国家自然科学基金项目（51606036，91434134）；黑龙江省普通本科高等学校青年创新人才培养计划（UNPYSCT-2016085）。

Main active substances and useless consumption path of free radicals in Fe (Ⅱ)/H₂O₂ system during NO oxidation process

ZHAO Haiqian¹, LIU Chenghao¹, ZHOU Wei², WANG Zhonghua¹, QI Hanbing¹, GAO Jihui²

1. Institute of Civil Engineering & Architecture, Northeast Petroleum University, Daqing 163318, Heilongjiang, China;
2. College of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China

Received:2017-09-19 Revised:2017-12-13 Online:2018-05-05 Published:2018-05-05
Supported by:
supported by the National Natural Science Foundation of China(51606036, 91434134) and Innovative Talents Training Plan for Youth Scholars in Heilongjiang Province (UNPYSCT-2016085).

摘要/Abstract

摘要：

H₂O₂利用率低是Fe （Ⅱ）/H₂O₂氧化体系应用的瓶颈，自由基无效消耗是H₂O₂利用率低的主要原因之一。本文以烟气中NO氧化为技术背景，实验研究了Fe （Ⅱ）/H₂O₂体系内H₂O₂及各种自由基在氧化NO中的作用及自由基无效消耗路径。结果表明：H₂O₂直接氧化NO能力很弱；虽然·OH及HO₂·均可以氧化NO，但·OH的氧化作用大于HO₂·。氧化NO同时，绝大多数·OH及HO₂·通过两者的快速复合反应而无效消耗，严重影响了H₂O₂利用率。因此，使用Fe （Ⅱ）/H₂O₂体系降解污染物过程中，应尽量避免·OH及HO₂·两种自由基同时大量存在。

关键词: Fe (Ⅱ)/H₂O₂体系, NO, 活性物质, 无效消耗, ·OH

Abstract:

Low utilization of H₂O₂ is a bottleneck in the application of Fe(Ⅱ)/H₂O₂ oxidation system. Free radicals useless consumption is one of the main reasons for the low utilization of H₂O₂. In this paper, the effect of H₂O₂ and various free radicals on oxidation of NO and the useless consumption pathways of the free radicals in Fe(Ⅱ)/H₂O₂ system were studied based on NO oxidation background. The results showed that the ability of directly oxidize NO by H₂O₂ was very weak. Although both ·OH and HO₂· had the ability to oxidize NO, the oxidation ability of ·OH was greater than that of HO₂·. In the process of NO oxidation, the vast majority of ·OH and HO₂· was uselessly consumed through the rapid recombination of these two kinds of radicals, which seriously affected the utilization of H₂O₂. Therefore, simultaneous presence of both ·OH and HO₂· radicals should be avoided when Fe(Ⅱ)/H₂O₂ system was adopted to degrade the pollutants.

Key words: Fe (Ⅱ)/H₂O₂ system, NO, active substance, useless consumption, ·OH

中图分类号:

O643

赵海谦, 刘城昊, 周伟, 王忠华, 齐晗兵, 高继慧. Fe(II)/H₂O₂体系氧化NO主要活性物质及自由基无效消耗路径[J]. 化工学报, 2018, 69(5): 2250-2254.

ZHAO Haiqian, LIU Chenghao, ZHOU Wei, WANG Zhonghua, QI Hanbing, GAO Jihui. Main active substances and useless consumption path of free radicals in Fe (Ⅱ)/H₂O₂ system during NO oxidation process[J]. CIESC Journal, 2018, 69(5): 2250-2254.

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Fe(II)/H₂O₂体系氧化NO主要活性物质及自由基无效消耗路径

Main active substances and useless consumption path of free radicals in Fe (Ⅱ)/H₂O₂ system during NO oxidation process

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