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浙江大学学报(工学版)
J4  2009, Vol. 43 Issue (09): 1625-1631    DOI: 10.3785/j.issn.1008-973X.2009.09.014
能源与机械工程     
臭氧在烟气中氧化零价汞的机理研究
温正城,王智化,杨卫娟,周俊虎,岑可法
（浙江大学 能源清洁利用国家重点实验室,浙江 杭州 310027）
Mechanism investigation on oxidization of Hg0 by ozone in flue gas
 WEN Zheng-Cheng, WANG Zhi-Hua, YANG Wei-Juan, ZHOU Jun-hu, CEN Ke-fa
（State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China）
 全文: PDF(855 KB)   HTML
摘要：

在构建70步详细反应机理的基础上,通过敏感度分析、试验研究及动力学模拟对臭氧在烟气中氧化零价汞机理进行深入分析与探讨.敏感度分析表明,反应Hg+NO3=NO2+HgO是直接影响Hg0氧化的关键基元反应,NO3的生成量是影响Hg0氧化的最关键因素.试验研究与动力学模拟表明,臭氧在烟气中能有效氧化零价汞,φ(O3)/φ(NO)越大或烟气温度越高(所研究温度范围内),Hg0氧化效果越好,且都基本呈线性关系.分析其原因为,φ(O3)/φ(NO)增大或烟气温度升高,可提高NO3的生成量,而NO3生成量的提高可直接使Hg0氧化效果增强.动力学模拟与试验研究结果取得了很好地吻合,验证了所构建反应机理的正确性.
Abstract:

A detailed chemical reaction mechanism including 70 steps of elemental mercury oxidization in flue gases by ozone was developed. Sensitivity analysis, experimental research and kinetic simulation were performed to analyze the oxidization mechanism. The sensitivity analysis results show that the reaction Hg+NO3=NO2+HgO is the key step and the NO3 concentration is the most important factor for affecting Hg0 oxidization. The experimental research and kinetic simulation results indicate that Hg0 oxidization increases linearly when the volume fraction ratio of O3 to NO becomes larger or the reaction temperature becomes higher. It could be explained by that, Hg0 oxidization increases linearly with the increasing of the NO3 concentration, while the NO3 concentration increases linearly when the volume fraction ratio of O3 to NO becomes larger or the reaction temperature becomes higher. The kinetic simulation results accorded well with the experimental  results, which indicated that the chemical reaction mechanism was reasonable．
:  TK 477  
基金资助:

国家自然科学基金资助项目(50476059)；国家“973”重点基础研究发展计划资助项目(2006CB200303)；国家杰出青年科学基金资助项目(50525620).
通讯作者: 王智化，男，副教授.     E-mail: giani@zju.edu.cn
作者简介: 温正城（1982-），男，浙江温州人, 博士生，从事污染物脱除机理的研究.
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温正城, 王智化, 杨卫娟, 等. 臭氧在烟气中氧化零价汞的机理研究[J]. J4, 2009, 43(09): 1625-1631.

WEN Zheng-Cheng, WANG Zhi-Hua, YANG Wei-Juan, et al. Mechanism investigation on oxidization of Hg0 by ozone in flue gas. J4, 2009, 43(09): 1625-1631.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2009.09.014    或    http://www.zjujournals.com/eng/CN/Y2009/V43/I09/1625

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