Comparing and interpreting laboratory results of Hg oxidation by a chlorine species
Comparing and interpreting laboratory results of Hg oxidation by a chlorine species
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DOI：
10.1016/j.fuproc.2007.03.001
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发表时间：
2007-07
影响因子：
7.5
通讯作者：
H. Agarwal;C. Romero;H. Stenger
中科院分区：
文献类型：
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作者：
H. Agarwal;C. Romero;H. Stenger
一些研究人员进行了实验工作，试图解释各种烟气成分对元素汞(Hg0)氧化的影响。有人认为，水(H2O)能抑制氯(Cl2)对汞的氧化。在最近发表的工作中，发现二氧化硫(SO2)和一氧化氮(NO)对汞的氧化也有抑制作用。本文旨在达到三个目的。首先，介绍在实验室规模的装置中获得的数据，该装置旨在测试Cl2对Hg0氧化随温度的影响。结果表明，随着温度的升高，Cl2作为汞的氧化剂效果不佳。其次，本文综合了多个来源的数据，观察和讨论了各种烟气组分对Hg0氧化的影响。结果表明：在高温下，氯化氢(HCl)是Hg0氧化的主要氯物种，而在较低温度下，Cl2是主要的氯物种。第三，提出了一个简单的双反应模型来预测实验数据。结果表明，汞氧化百分数预测值与实测值吻合较好。
Several researchers have performed experimental work in attempts to explain the effects of various flue-gas components on the oxidation of elemental mercury (Hg 0). Some have concluded that water (H 2 O) inhibits Hg oxidation by chlorine (Cl 2). In recently published work, it was found that sulfur dioxide (SO 2) and nitric oxide (NO) also have an inhibitory effect on Hg oxidation. This paper aims to serve three purposes. First, to present data obtained in a laboratory scale apparatus, designed to test the effects of Cl 2 on the oxidation of Hg 0 with respect to temperature. The results show that as temperature increases, Cl 2 is less effective as an Hg oxidizing agent. Second, this paper presents a consolidation of data taken from several sources, where the effects of various flue-gas components on the oxidation of Hg 0 is observed and discussed. The summary of these results shows the following general trends: at high temperatures, hydrogen chloride (HCl) is the primary chlorine species responsible for Hg 0 oxidation, while at lower temperatures, Cl 2 is the dominant species. Third, a simple two reaction model is suggested to predict the experimental data shown in this paper. The results show that the predicted percent Hg oxidation values correspond very well with the observed experimental values.