Conversion of elemental mercury with a novel membrane delivery catalytic oxidation system (MDCOs).
Conversion of elemental mercury with a novel membrane delivery catalytic oxidation system (MDCOs).
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DOI：
10.1021/es1020586
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发表时间：
2011-01
影响因子：
11.4
通讯作者：
Yongfu Guo;N. Yan;Shijian Yang;Zan Qu;Zhongbiao Wu;Yue Liu;Ping Liu;J. Jia
中科院分区：
文献类型：
--
作者：
Yongfu Guo;N. Yan;Shijian Yang;Zan Qu;Zhongbiao Wu;Yue Liu;Ping Liu;J. Jia
为了克服传统催化氧化（TCO）模式转化烟气中痕量元素汞（Hg（0））的缺点，提出了一种新颖独特的膜传递与催化氧化系统（MDCOs）集成的组件，将氧化剂的可控传递与Hg（0）的催化氧化相结合。实验结果表明，MDCOs中Hg（0）转化所需的HCl量小于TCO模式的5%，当HCl逸出量小于0.5mgm（-3）时，MDCOs的Hg（0）去除率可达90%以上。同时，在MDCOs中SO2对Hg（0）催化转化的抑制作用也没有TCO中明显。MDCO对HCl的截留率高，有利于Hg（0）的转化和HCl的利用。讨论了MDCO中汞转化的反应机理。MDCO似乎是控制元素汞排放的一种有前途的方法。
In order to overcome the shortcomings of the traditional catalytic oxidation (TCO) mode for the conversion of the trace level of elemental mercury (Hg(0)) in flue gas, we put forward a novel and unique assembly that integrated membrane delivery with catalytic oxidation systems (MDCOs), which combined the controlled delivery of oxidants with the catalytic oxidation of Hg(0). The results show that the demanded HCl for Hg(0) conversion in the MDCOs was less than 5% of that in the TCO mode, and over 90% of Hg(0) removal efficiency can be obtained in the MDCOs with less than 0.5 mg m(-3) of HCl escaped. Meanwhile, the inhibition of SO(2) to Hg(0) catalytic conversion in the MDCOs was also less significant than in the TCO. The MDCOs have high retainability for HCl, which is quite favorable to Hg(0) conversion and HCl utilization. The reaction mechanism on mercury conversion in the MDCOs is discussed. The MDCOs appear to be a promising method for emission control of elemental mercury.