Transformation of sodium during Wucaiwan coal pyrolysis

LIU Da-hai; ZHANG Shou-yu; TU Sheng-kang; JIN Tao; SHI Deng-yu; PEI Yu-feng

Volume 42 Issue 10

Oct. 2014

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Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(10): 1190-1196

LIU Da-hai, ZHANG Shou-yu, TU Sheng-kang, JIN Tao, SHI Deng-yu, PEI Yu-feng. Transformation of sodium during Wucaiwan coal pyrolysis[J]. Journal of Fuel Chemistry and Technology, 2014, 42(10): 1190-1196.

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LIU Da-hai, ZHANG Shou-yu, TU Sheng-kang, JIN Tao, SHI Deng-yu, PEI Yu-feng. Transformation of sodium during Wucaiwan coal pyrolysis[J]. Journal of Fuel Chemistry and Technology, 2014, 42(10): 1190-1196.

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Transformation of sodium during Wucaiwan coal pyrolysis

1.
Department of Thermal Engineering, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
2.
Shanghai J.E Power Plant Equipment Co., LTD, Shanghai 200437, China;
3.
Northeast Electric Power Design Institute of China Power Engineering Consulting Group, Changchun 130021, China

Received Date: 2014-05-08
Rev Recd Date: 2014-06-23
Publish Date: 2014-10-30

Abstract

Abstract

The existing forms of sodium in Wucaiwan coal, a high sodium content coal from Zhundong area in Xinjiang Uygur Autonomous Regions, China, were determined by three-step-extraction method and by the analysis of microwave digestion and inductively coupled plasma atomic emission spectrometry (ICP-AES). The existing forms of sodium in treated samples and the chars were also determined. The transformation of sodium in the raw coal and the treated coals during pyrolysis was investigated. The results show that most of the sodium in Wucaiwan coal exists in the form of water-solution sodium, and the organically bound sodium exists mainly in the form of carboxylate. During pyrolysis, the release of water soluble sodium and ammonium-acetate soluble sodium from the coal samples mainly takes place in the temperature range of 650~850 ℃, and the release of total sodium gets to the largest value at 1 050 ℃ accompanied with the releasing of hydrochloric soluble sodium. However, most of the sodium in the treated coal chars exists in the form of insoluble type. The transformation of a part of water soluble sodium and hydrochloric soluble sodium in all samples into ammonium-acetate soluble sodium during pyrolysis at 450~650 ℃ can be observed.
- Wucaiwan coal,
- sodium,
- pyrolysis,
- existence form,
- transformation

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References(22)

References

严陆光, 夏训诚, 吕绍勤, 吴甲春, 林闽, 黄常纲. 大力推进新疆大规模综合能源基地的发展[J]. 电工电能新技术, 2011, 30(1): 1-7. (YAN Lu-guang, XIA Xun-cheng, LU Shao-qin, WU Jia-chun, LIN Min, HUANG Chang-gang. Great promotion of development of large scale integrative energy base in Xinjiang[J]. Advanced Technology of Electrical Engineering and Energy, 2011, 30(1): 1-7.)

陈川, 张守玉, 刘大海, 郭熙, 董爱霞, 熊绍武, 施大钟, 吕俊复. 新疆高钠煤中钠的赋存形态及其对燃烧过程的影响[J]. 燃料化学学报, 2013, 41(7): 832-838. (CHEN Chuan, ZHANG Shou-yu, LIU Da-hai, GUO Xi, DONG Ai-xia, XIONG Shao-wu, SHI Da-zhong, LU Jun-fu. Existence form of sodium in high coals from Xinjiang and its effect on combustion process[J]. Journal of Fuel Chemistry and Technology, 2013, 41(7): 832-838.)

卫小芳, 刘铁峰, 黄戒介, 房倚天, 王洋. 澳大利亚高盐煤中钠在热解过程中的形态变迁[J]. 燃料化学学报, 2010, 38(2): 144-148. (WEI Xiao-fang, LIU Tie-feng, HUANG Jie-jie, FANG Yi-tian, WANG Yang. Transformation of Na in an Australian high-sodium coal during pyrolysis[J]. Journal of Fuel Chemistry and Technology, 2010, 38(2): 144-148.)

邱朋华, 王文杰, 焦广亮, 吴少华, 秦裕琨. CO对碱金属凝结特性影响的试验研究[J]. 中国电机工程学报, 2010, 30(11): 56-61. (QIU Peng-hua, WANG Wen-jie, JIAO Guang-liang, WU Shao-hua, QIN Yu-kun. Experimental research on the effect of CO on alkali metals' condensation characteristics[J]. Proceedings of the CSEE, 2010, 30(11): 56-61.)

张军, 汉春利, 颜峥, 余刚, 刘坤磊, 徐益谦. 煤中钠在燃烧初期行为的研究[J]. 燃料化学学报, 2001, 29(1): 49-53. (ZHANG Jun, HAN Chun-li, YAN Zheng, YU Gang, LIU Kun-lei, XU Yi-qian. Experimental studies on the behaviour of sodium of coal in the initial stage of combustion[J]. Journal of Fuel Chemistry and Technology, 2001, 29(1): 49-53.)

ERICH R. Mineral impurities in coal combustion[M]. Washington: Hemisphere Publishing Corporation, 1985: 97-101.

刘敬, 王智化, 项飞鹏, 黄镇宇, 刘建忠, 周俊虎, 岑可法. 准东煤中碱金属的赋存形式及其在燃烧过程中的迁移规律实验研究[J]. 燃料化学学报, 2014, 42(3): 316-322. (LIU Jing, WANG Zhi-hua, XIANG Fei-peng, HUANG Zhen-yu, LIU Jian-zhong, ZHOU Jun-hu, CEN Ke-fa. Modes of occurrence and transformation of alkali metals in Zhundong coal during combustion[J]. Journal of Fuel Chemistry and Technology, 2014, 42(3): 316-322.)

BENSON S A, HOLM P L. Comparison of inorganic constituents in three low-rank coals[J]. Ind Eng Chem Prod Res Dev, 1985, 24(1): 145-149.

张军, 汉春利, 刘坤磊, 徐益谦. 煤中碱金属及其在燃烧中的行为[J]. 热能动力工程, 1999, 14(2): 83-85. (ZHANG Jun, HAN Chun-li, LIU Kun-lei, XU Yi-qian. Various forms of alkali metal in coal and its behavior during coal combustion[J]. Journal of Engineering for Thermal Energy and Power, 1999, 14(2): 83-85.)

DAVIDSSON K O, KORSGREN J G, PETTERSSON J B C, JÄGLID U. The effects of fuel washing techniques on alkali release from biomass[J]. Fuel, 2002, 81(2): 137-142.

杜胜磊, 杨海平, 钱柯贞, 姚丁丁, 王贤华, 陈汉平. 生物质热解过程中碱及碱土金属迁徙规律研究[J]. 中国电机工程学报, 2013, 33(26): 48-53,1. (DU Sheng-lei, YANG Hai-ping, QIAN Ke-zhen, YAO Ding-ding, WANG Xian-hua, CHNE Han-ping. Releasing behavior of alkali and alkaline earth metals during biomass pyrolysis[J]. Proceedings of the CSEE, 2013, 33(26): 48-53,1.)

杨天华, 肖蕾, 开兴平, 丁一, 陈志敏, 李润东. 玉米秸秆与塑料PE共气化过程中碱金属迁移行为的研究[J]. 燃料化学学报, 2013, 41(6): 673-678. (YANG Tian-hua, XIAO Lei, KAI Xing-ping, DING Yi, CHEN Zhi-min, LI Run-dong. Study on migration behavior of alkali metals during co-gasification of corn stalk and PE[J]. Journal of Fuel Chemistry and Technology, 2013, 41(6): 673-678.)

MURRAY J B. Changes in state of combination of inorganic constituents during carbonization of Victorian brown coal[J]. Fuel, 1973, 52(2): 105-111.

汉春利, 张军, 刘坤磊, 徐益谦. 煤中钠存在形式的研究[J]. 燃料化学学报, 1999, 27(6): 575-578. (HAN Chun-li, ZHANG Jun, LIU Kun-lei, XU Yi-qian. Modes of occurrence of sodium in coals[J]. Journal of Fuel Chemistry and Technology, 1999, 27(6): 575-578.)

李勇, 肖军. 燃煤过程中碱金属赋存迁移规律及相关研究进展[J]. 洁净煤技术, 2005, 11(1): 39-44. (LI Yong, XIAO Jun. The occurrence and migration mechanism of alkali metal during coal-fired process and research progress[J]. Clean Coal Technology, 2005, 11(1): 39-44.)

石金明, 向军, 胡松, 孙路石, 苏胜, 徐朝芬, 许凯. 洗煤过程中煤结构的变化[J]. 化工学报, 2010, 61(12): 3220-3227. (SHI Jin-ming, XIANG Jun, HU Song, SUN Lu-shi, SU Sheng, XU Chao-fen, XU Kai. Change of coal structure during washing process[J]. CIESC Journal, 2010, 61(12): 3220-3227.)

岑可法. 锅炉和热交换器的积灰、结渣、磨损和腐蚀的防止原理与计算[M]. 北京: 科学出版社, 1994: 15-33. (CEN Ke-fa. Prevention principle and calculation on fouling, agglomeration, abrasion and corrosion of boil and heat exchanger[M]. Beijing: Science Press, 1994: 15-33.)

汉春利, 张军, 颜峥, 顾璠, 刘坤磊, 徐益谦. 钠在煤燃烧初期释放特性的多元相关分析[J]. 燃烧科学与技术, 2002, 8(5): 395-398. (HAN Chun-li, ZHANG Jun, YAN Zheng, GU Fan, LIU Kun-lei, XU Yi-qian. Multivariate statistical analysis on the behaviour of sodium of coal in the initial stage of combustion[J]. Journal of Combustion Science and Technology, 2002, 8(5): 395-398.)

LINDNER E R, WALL T F. Sodium ash reactions during combustion of pulverised coal.[C] Symposium (International) on Combustion. Elsevier, 1991, 23(1): 1313-1321.

QUYN D M, WU H, LI C Z. Volatilisation and catalytic effects of alkali and alkaline earth metallic species during the pyrolysis and gasification of Victorian brown coal. Part I. Volatilisation of Na and Cl from a set of NaCl-loaded samples[J]. Fuel, 2002, 81(2): 143-149.

SCHAFER H N S. The science of Victorian brown coal[M]. Oxford: Butterworth /Heinemann, 1991.

SATHE C, HAYASH I J I, CHIBA T. Release of alkali and alkaline earth metallic species during rapid pyrolysis of a Victotian brown coal at elevated pressures[J]. Fuel, 2003, 82(12): 1491-1497.

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