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CaCl2添加对热解煤中汞析出规律影响的实验研究

董勇,  喻敏,  王鹏,  张梦泽,  睢辉,  崔琳,  张立强,  徐夕仁,  马春元

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文章导航 > 燃料化学学报（中英文）  > 2014 >  42(01): 31-36
董勇, 喻敏, 王鹏, 张梦泽, 睢辉, 崔琳, 张立强, 徐夕仁, 马春元. CaCl2添加对热解煤中汞析出规律影响的实验研究[J]. 燃料化学学报（中英文）, 2014, 42(01): 31-36.
引用本文: 董勇, 喻敏, 王鹏, 张梦泽, 睢辉, 崔琳, 张立强, 徐夕仁, 马春元. CaCl2添加对热解煤中汞析出规律影响的实验研究[J]. 燃料化学学报（中英文）, 2014, 42(01): 31-36.
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DONG Yong, YU Min, WANG Peng, ZHANG Meng-ze, SUI Hui, CUI Lin, ZHANG Li-qiang, XU Xi-ren, MA Chun-yuan. Experimental study on mercury release behavior during coal pyrolysis with calcium chloride addition[J]. Journal of Fuel Chemistry and Technology, 2014, 42(01): 31-36.
Citation: DONG Yong, YU Min, WANG Peng, ZHANG Meng-ze, SUI Hui, CUI Lin, ZHANG Li-qiang, XU Xi-ren, MA Chun-yuan. Experimental study on mercury release behavior during coal pyrolysis with calcium chloride addition[J]. Journal of Fuel Chemistry and Technology, 2014, 42(01): 31-36.
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CaCl2添加对热解煤中汞析出规律影响的实验研究

  • 山东大学 燃煤污染物减排国家工程实验室, 山东 济南 250061

基金项目: 国家自然科学基金（51176103）。
详细信息
    通讯作者:

    董勇，男，教授，主要从事燃烧污染物控制理论与技术研究。Tel：0531-88399371，Fax：0531-88395877，E-mail：dongy@sdu.edu.cn。

  • 中图分类号: TQ534

Experimental study on mercury release behavior during coal pyrolysis with calcium chloride addition

  • National Engineering Laboratory for Coal-fired Pollutants Emission Reduction, Shandong University, Jinan 250061, China

    摘要
  • 摘要: 在程序升温热解反应装置上，研究了低氯煤中添加不同氯含量（质量分数0.1%、0.3%、0.5%）的CaCl2对煤热解过程中汞析出规律的影响。实验结果表明，温度是影响汞析出的关键因素；随着氯添加量的增加，Hg2+析出比例呈上升趋势，且汞的最佳析出温度降低，汞的释放率也有所降低；随着热解气氛中O2比例的增加，Hg2+比例也略有增加；较高的升温速率能加快汞的释放，也能提高Hg2+的比例。低氯煤中添加氯化钙能够强化单质汞的氧化。
    Abstract: Mercury release and speciation behavior during coal pyrolysis with the addition of calcium chloride in different chlorine contents of 0.1%,0.3% and 0.5% in mass was studied in a temperature-programmed tube furnace. The concentration of gaseous mercury was monitored online with an online mercury analyzer. The results show that the temperature is a key factor for the mercury releasing during coal pyrolysis. With the rising of calcium chloride addition in coal, the percentage of Hg2+ increases, while the temperature of maximum mercury releasing and the release of total mercury decrease. The percentage of Hg2+ also increases to some degrees with the increase of O2 percentage raised. Higher heating rate can promote the mercury release in coal and enhance the proportion of Hg2+ in flue gas. The study indicates that the calcium chloride addition into the low-chlorine coal can enhance the oxidation of Hg0.
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出版历程
  • 收稿日期:  2013-04-02
  • 修回日期:  2013-07-26
  • 刊出日期:  2014-01-30

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