煤中汞赋存形态及其热解时析出规律研究

王鹏; 董勇; 喻敏; 崔琳; 张立强

煤中汞赋存形态及其热解时析出规律研究

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）；山东省自然科学基金（ZR2011EEQ019）。

详细信息

通讯作者:
董勇，Tel：0531-88399371，E-mail：dongy@sdu.edu.cn

中图分类号: TQ534
计量
- 文章访问数: 1043
- HTML全文浏览量: 19
- PDF下载量: 712
- 被引次数: 0
出版历程
- 收稿日期: 2013-08-22
- 修回日期: 2013-11-07
- 刊出日期: 2014-02-28

Mercury occurrence mode in coal and its release behavior during pyrolysis

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

摘要

摘要: 利用程序升温热解反应系统，研究了煤中不同形态汞的析出温度，通过积分各析出温度下汞的总析出量来分析各赋存形态的汞所占比例，同时研究了添加CaCl₂后抑制煤热解过程中汞析出的机理。结果表明，实验所选煤中汞主要存在三种赋存形态，其析出温度点分别在220、300和400 ℃；其中，300 ℃析出的汞所占比例最高，为54.18%，从析出温度分析该部分汞主要以HgS的形式赋存。添加CaCl₂对第一和第三赋存形态的汞析出具有抑制作用，改变了其析出温度，对第二赋存形态的汞析出几乎无影响，添加后使得汞析出温度更为集中；抑制析出的主要原因是氧化吸附，添加CaCl₂对汞总析出量基本无影响。
- 汞 /
- 煤 /
- 赋存形态 /
- 析出规律
Abstract: A temperature-programmed tube furnace was set up to investigate the occurrence modes of mercury in coal according to its releasing temperature during pyrolysis. The fraction of mercury in each occurrence mode was determined by calculating the total released amount at different temperature ranges. The mechanism of mercury release inhabitation by CaCl₂ was studied as well. The result showed that there are mainly three occurrence modes of mercury in coal: their release temperatures are 220, 300 and 400 ℃.The secondary mode released at 300 ℃ takes 54.18%, which should be HgS according to its decomposition temperature. The CaCl₂ inhibited the release of mercury at 220 and 400 ℃. The inhabitation is mainly caused by mercury oxidation and adsorption. By adding CaCl₂, the mercury release is focused to a certain temperature but the total release amount is hardly influenced.
- mercury /
- coal /
- occurrence mode /
- release behavior

HTML全文

参考文献(10)

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.)

MEIJ R, TE WINKEL B H. Trace elements in world steam coal and their behaviour in Dutch coal-fired powerstations: A review[J]. Int J Coal Geol, 2009, 77(3/4): 289-293.

LUO G Q, MA J J, HAN J, YAO H, XU M H, ZHANG C, CHEN G, GUPTA R, XU Z H. Hg occurrence in coal and its removal before coal utilization[J]. Fuel, 2013, 104: 70-76.

LOPEZ-ANTON M A, YUAN Y, PERRY R, MAROTO-VALER M M. Analysis of mercury species present during coal combustion by thermal desorption[J]. Fuel, 2010, 89(3): 629-634.

罗光前. 燃煤汞形态识别及其脱除的研究[D]. 武汉: 华中科技大学, 2009. (LUO Guang-qian. Study on mercury occurrence mode and removel from coal combustion[D]. Wuhan: Huazhong University of Science and Technology, 2009.)

LUO G Q, YAO H, XU M H, GUPTA R, XU Z H. Identifying modes of occurrence of mercury in coal by temperature programmed pyrolysis[J]. Pro Combust Inst, 2011, 31(2): 2763-2769.

郭欣, 郑楚光, 刘迎晖, 刘晶, 陆晓华. 煤中汞, 砷, 硒赋存形态的研究[J]. 工程热物理学报, 2001, 22(6): 763-766. (GUO Xin, ZHENG CHU-guang, LIU Ying-hui, LIU Jing, LU Xiao-hua. The study on the mode of occurrence of mercury, arsenic and selenium in coal[J]. Journal of Engineering Thermophysics, 2001, 22(6): 763-766.)

ZHENG L G, LIU G J, QI C C, ZHANG Y, WONG M H. The use of sequential extraction to determine the distribution and modes of occurrence of mercury in Permian Huaibei coal, Anhui Province, China[J]. Int J Coal Geol, 2008, 73(2): 139-155.

RILEY K W, FRENCH D H, FARRELL O P, WOOD R A, HUGGINS F E. Modes of occurrence of trace and minor elements in some Australian coals[J]. Int J Coal Geol, 2012, 94: 214-224.

杨祥花, 江贻满, 杨立国, 段钰锋. 燃煤汞形态分布和排放特性研究[J]. 能源研究与利用, 2006, (01): 13-16. (YANG Xiang-hua, JIANG Yi-man, YANG Li-guo, DUAN Yu-feng. Mercury speciation distributions in coal and emission during combustion[J]. Energy Research & Utilization, 2006, (01): 13-16.)

施引文献

资源附件(0)

访问统计