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

DONG Yong; YU Min; WANG Peng; ZHANG Meng-ze; SUI Hui; CUI Lin; ZHANG Li-qiang; XU Xi-ren; MA Chun-yuan

Volume 42 Issue 01

Jan. 2014

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Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(01): 31-36

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.

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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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

Received Date: 2013-04-02
Rev Recd Date: 2013-07-26
Publish Date: 2014-01-30

Abstract

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.
- mercury,
- coal,
- calcium chloride,
- pyrolysis

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References(23)

References

郑楚光, 张军营, 赵永椿, 刘晶, 郭欣.煤燃烧汞的排放及控制[D]. 北京: 科学出版社, 2010: 11. (ZHENG Chu-guang, ZHANG Jun-ying, ZHAO Yong-chun, LIU Jing, GUO Xin. Emission and control of mercury from coal combustion[D]. Beijing: Science Press, 2010: 11.)

TOOLE-O'NEIL B, TEWALT S J, FINKELMAN R B, AKERS D J. Mercury concentration in coal-unraveling the puzzle[J]. Fuel, 1999, 78(1): 47-54.

任建莉, 周劲松, 骆仲泱, 岑可法. 煤中汞燃烧过程析出规律试验研究[J]. 环境科学学报, 2002, 22(3): 289-293. (REN Jian-li, ZHOU Jing-song, LUO Zhong-yang, CEN Ke-fa. Experimental study of mercury release behaviors in coal combustion[J]. Environmental Science & Technology, 2002, 22(3): 289-293.)

TAN Y, MORTAZAV I R, DUREAU B, DOUGLAS M A. An investigation of mercury distribution and speciation during coal combustion[J]. Fuel, 2004, 83(16): 2229-2236.

CHEN L, DUAN Y F, ZHUO Y Q, YANG L G, ZHANG L, YANG X H, YAO Q, JIANG Y M, XU X C. Mercury transformation across particulate control devices in six power plants of China: The co-effect of chlorine and ash composition[J]. Fuel, 2007, 86(4): 603-610.

陶叶, 禚玉群, 张亮, 陈昌和, 徐旭常. HCl与NO对汞氧化反应影响的实验研究[J]. 工程热物理学报, 2010, 31(2): 355-359. (TAO Ye, ZHOU Yu-qun, ZHANG Liang, CHEN Chang-he, XU Xu-chang. Experimental study of the effects of HCl and NO on mercury oxidation[J]. Journal of Engineering Thermophysics, 2010, 31(2): 355-359.)

LIU K, GAO Y, KELLIE S, PAN W P, RILEY J T. A study of mercury removal in FBC systems fired with high-chlorine coals[J]. Combust Sci Technol, 2001, 164(1): 145-162.

CHU P. An assessment of mercury emissions from US coal-fired power plants: CA, 1000608[P]. 2000-10-10.

Information collection request for electric utility steam-generating unit Hg emissions information collection effort[Z].U.S. Environmental Protection Agency, Washington, DC, 1999.

VIDIC R D, SILER D P. Vapor-phase elemental mercury adsorption by activated carbon impregnated with chloride and chelating agents[J]. Carbon, 2001, 39(1): 3-14.

CHAO C C, PONTANIO S J. Adsorbents for mercury removal from flue gas: WO, 2006099291A2[P]. 2006-09-21.

ZENG H C, JIN F, GUO J. Removal of elemental mercury from coal combustion flue gas by chloride-impregnated activated carbon[J]. Fuel, 2004, 83(1): 143-146.

ZHUANG Y, THOMPSON J S, ZYGARLICKE C J, PAVLISH J H. Impact of calcium chloride addition on mercury transformations and control in coal flue gas[J]. Fuel, 2007, 86(15): 2351-2359.

潘卫国, 吴江, 王文欢, 何平, 张赢丹, 冷雪峰, 沈敏强. 添加NH₄Cl对煤燃烧生成Hg和NO影响的研究[J]. 中国电机工程学报, 2009, 29(29): 41-46. (PAN Wei-guo, WU Jiang, WANG Wen-huan, HE Ping, ZHANG Ying-dan, LENG Xue-feng, SHEN Min-qiang. Study on the effect of NH₄Cl addition on Hg and NO produced by coal combustion[J]. Proceedings of the CSEE, 2009, 29(29): 41-46.)

吴怡卫. 石灰石-石膏湿法烟气脱硫废水处理的研究[J]. 中国电力, 2006, 4(39): 75-78. (WU Yi-wei. Study of limestone-gypsum wet FGD wastewater treatment[J]. Electric Power, 2006, 4(39): 75-78.)

周卫青, 李进. 火电厂石灰石湿法烟气脱硫废水处理方法[J]. 电力环境保护, 2006, 22(1): 29-31. (ZHOU Wei-qing, LI Jin. Methods to treat waste water from limestone wet flue gas desulfurization in power plant[J]. Electric Power Environmental Protection, 2006, 22(1): 29-31.)

刘建权, 赵峰华, 刘璟, 李建国. 氧弹燃烧-离子色谱法测定煤中氯含量[J]. 分析化学研究报告, 2009, 37(8): 1152-1156. (LIU Jian-quan, ZHAO Feng-hua, LIU Jin, LI Jian-guo. Measurement of the chlorine content in coal with oxygen bomb combustion-ion chromatographic[J]. Chinese Journal of Analytical Chemistry, 2009, 37(8): 1152-1156.)

唐修义, 陈萍. 中国煤中的氯[J]. 中国煤田地质, 2002, 14(B07): 33-36. (TANG Xiu-yi, CHEN Ping. Chlorine in coal in China[J]. Coal Geology of China, 2002, 14(B07): 33-36.)

况敏, 杨国华, 胡文佳, 陈武军. 燃煤电厂烟气脱汞技术现状分析与展望[J]. 环境科学与技术, 2008, 31(5): 66-69. (KUANG Min, YANG Guo-hua, HU Wen-jia, CHEN Wu-jun. Analysis and prospect of technology for removing mercury from flue gas[J]. Environmental Science & Technology, 2008, 31(5): 66-69.)

郭少青, 杨建丽, 刘振宇. 热解气氛对晋城煤中汞析出的影响[J]. 燃料化学学报, 2008, 36(4): 397-400. (GUO Shao-qing, YANG Jian-li, LIU Zhen-yu. Influence of atmosphere on mercury release during Jin cheng coal pyrolysis[J]. Journal of Fuel Chemistry and Technology, 2008, 36(4): 397-400.)

丘纪华. 煤粉在热分解过程中比表面积和孔隙结构的变化[J].燃料化学学报, 1994, 22(3): 316-319. (QIU Ji-hua. Variation of surface area and pore structure of pulverized coal during pyrolysis[J]. Journal of Fuel Chemistry and Technology, 1994, 22(3): 316-319.)

王明敏, 张建胜, 张守玉. 热解条件下对煤焦比表面积及孔隙分布的影响[J]. 煤炭学报, 2008, 33(1): 76-79. (WANG Ming-min, ZHANG Jian-sheng, ZHANAG Shou-yu.Effect of pyrolysis conditions on the char surface area and pore distribution[J]. Journal of China Coal Society, 2008, 33(1): 76-79.)

蒋旭光, 徐旭, 严建华, 池涌, 岑可法. 我国煤中氯含量分布特性的试验研究[J]. 煤炭转化, 2001, 24(2): 58-60. (JIANG Xu-guang, XU Xu, YAN Jian-hua, CHI Yong, Cen Ke-fa. Experimental research of chlorine distribution properties in Chinese coal[J]. Coal Convertion, 2001, 24(2): 58-60.)

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