Release characteristics of Na/Ca in Zhundong coal under inert atmosphere

YANG Yan-mei; ZHANG Yang; ZHANG Hai; WU Yu-xin; LIU Qing; LÜ Jun-fu

Volume 46 Issue 4

Apr. 2018

Turn off MathJax

Article Contents

Article Navigation > Journal of Fuel Chemistry and Technology > 2018 > 46(4): 385-390

YANG Yan-mei, ZHANG Yang, ZHANG Hai, WU Yu-xin, LIU Qing, LÜ Jun-fu. Release characteristics of Na/Ca in Zhundong coal under inert atmosphere[J]. Journal of Fuel Chemistry and Technology, 2018, 46(4): 385-390.

Citation:

YANG Yan-mei, ZHANG Yang, ZHANG Hai, WU Yu-xin, LIU Qing, LÜ Jun-fu. Release characteristics of Na/Ca in Zhundong coal under inert atmosphere[J]. Journal of Fuel Chemistry and Technology, 2018, 46(4): 385-390.

Citation:

PDF( 732 KB)

Release characteristics of Na/Ca in Zhundong coal under inert atmosphere

1.
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
2.
China National Institute of Standardization, Beijing 100191, China

Funds:

National Science and Technology Support Project of China 2015BAA04B01

National Science and Technology Support Project of China 2015BAA04B02

More Information

Corresponding author: ZHANG Hai, E-mail: haizhang@mail.tsinghua.edu.cn
Received Date: 2018-01-04
Rev Recd Date: 2018-02-08

Available Online: 2021-01-23

Publish Date: 2018-04-10

Abstract

Abstract

The release and transformation characteristics of Na/Ca in Zhundong coal under inert atmosphere were studied by using tubular heating furnace based on occurrence modes of Na/Ca containing species. It is found that water soluble Na_w firstly transfers to insoluble Na_re when the heating temperature is lower than 600℃. As the temperature increases, insoluble Na_re transfers back to water soluble Na_w. Large amount of Na releases when the temperature is higher than 800℃. Acid soluble Ca_ac firstly decomposes to CaO when the heating temperature is lower than 700℃, and CaO reacts with other minerals to form insoluble Ca_re. As the temperature increases, insoluble Ca_re transfers to acid soluble Ca_ac and water soluble Ca_w. At the same temperature, the release rate of Ca is lower than that of Na. Moreover, a little amount of acid soluble organic Ca will release when the volatile matter releases.
- Zhundong coal,
- Na/Ca,
- release characteristics,
- transformation

FullText(HTML)

References(13)

References

[1]	ZHOU J, ZHUANG X, ALASTUEY A, QUEROL X, LI J. Geochemistry and mineralogy of coal in the recently explored Zhundong large coal field in the Junggar basin, Xinjiang province, China[J]. Int J Coal Geol, 2010, 82(1/2):51-67. https://www.sciencedirect.com/science/article/pii/S0166516209002304
[2]	杨忠灿, 刘家利, 姚伟.准东煤灰沾污指标研究[J].洁净煤技术, 2013, 19(2):81-84. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=jjmjs201302022 YANG Zhong-can, LIU Jia-li, YAO Wei. Fouling index of Zhundong coal ash[J]. Clean Coal Technol, 2013, 19(2):81-84. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=jjmjs201302022
[3]	王礼鹏, 赵永椿, 张军营, 姚斌, 郑楚光.准东煤沾污结渣特性研究[J].工程热物理学报, 2015, (6):1381-1385. http://www.cnki.com.cn/Article/CJFDTOTAL-RLFD201008013.htm WANG Li-peng, ZHAO Yong-chun, ZHANG Jun-ying, YAO Bin, ZHENG Chu-guang. Research on the slagging and fouling characteristics of Zhundong coal[J]. J Eng Therm, 2015, (6):1381-1385. http://www.cnki.com.cn/Article/CJFDTOTAL-RLFD201008013.htm
[4]	刘家利.准东煤灰熔融性与灰成分相关性分析[J].洁净煤技术, 2015, 21(5):99-102. http://www.cnki.com.cn/Article/CJFDTotal-JJMS201505024.htm LIU Jia-li. Correlation analysis of ash fusibility and ash composition of Zhundong coal[J]. Clean Coal Technol, 2015, 21(5):99-102. http://www.cnki.com.cn/Article/CJFDTotal-JJMS201505024.htm
[5]	樊斌, 于敦喜, 曾宪鹏, 吕为智, 吴建群, 徐明厚.准东煤燃烧中矿物质转化行为的CCSEM研究[J].化工学报, 2016, 67(5):2117-2123. http://www.cnki.com.cn/Article/CJFDTotal-HGSZ201605062.htm FAN Bin, YU Dun-xi, ZENG Xian-peng, LÜ Wei-zhi, WU Jian-qun, XU Ming-hou. Mineral transformation during Zhundong coal combustion by CCSEM[J]. J Chem Ind Eng (China), 2016, 67(5):2117-2123. http://www.cnki.com.cn/Article/CJFDTotal-HGSZ201605062.htm
[6]	MANZOORI A R, AGARWAL P K. The fate of organically bound inorganic elements and sodium chloride during fluidized bed combustion of high sodium, high sulphur low rank coals[J]. Fuel, 1992, 71(5):513-522. doi: 10.1016/0016-2361(92)90148-H
[7]	WANG C A, JIN X, WANG Y, YAN Y, CHU I, LIU Y, CHE D. Release and transformation of sodium during pyrolysis of Zhundong coals[J]. Energy Fuels, 2015, 29(1):78-85. doi: 10.1021/ef502128s
[8]	王智化, 李谦, 刘敬, 黄镇宇, 周志军, 周俊虎, 岑可法.准东煤中碱金属的赋存形态及其在热解过程中的迁移规律[J].中国电机工程学报, 2014, 34(s1):130-135. http://www.cnki.com.cn/Article/CJFDTotal-ZGDC2014S1018.htm WANG Zhi-hua, LI Qian, LIU Jing, Huang Zhen-yu, ZHOU Zhi-jun, ZHOU Jun-hu, CEN Ke-fa. Occurrence of alkaili metals in Zhundong coal and its migration during pyrolysis[J]. Proc CSEE, 2014, 34(s1):130-135. http://www.cnki.com.cn/Article/CJFDTotal-ZGDC2014S1018.htm
[9]	姚宇翔, 金晶, 钟程鹏, 王永贞, 高姗姗, 赵庆庆.准东煤中钠的赋存形态及挥发特性[J].煤炭转化, 2016, 39(1):1-5. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=mtzh201601001 YAO Yu-xiang, JIN Jing, ZHONG Cheng-peng, WANG Yong-zhen, GAO Shan-shan, ZHAO Qing-qing. Occurrence mode and volatilization characteristic of sodium in Zhundong coal[J]. Coal Convers, 2016, 39(1):1-5. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=mtzh201601001
[10]	YANG Y, WU Y, ZHANG H, ZHANG M, LIU Q, YANG H, LU J. Improved sequential extraction method for determination of alkali and alkaline earth metals in Zhundong coals[J]. Fuel, 2016, 181:951-957. doi: 10.1016/j.fuel.2016.05.014
[11]	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. doi: 10.1016/S0016-2361(01)00127-2
[12]	TAKARADA T, ISHIKAWA H, ABE H, NAKAIKE Y. Alkali volatilisation during pyrolysis and gasification of coal[J]. Coal Sci Technol, 1994, 24:687-690. https://www.sciencedirect.com/science/article/pii/S0016236106000202
[13]	LI C Z, SATHE C, KERSHAW J R, PANG Y. Fates and roles of alkali and alkaline earth metals during the pyrolysis of a victorian brown coal[J]. Fuel, 2000, 79(3):427-438. https://www.sciencedirect.com/science/article/pii/S0016236199001787