Citation: GUO Shuai, HUO Xiao-dong, SONG Shuang-shuang, JIANG Yun-feng, ZHAO Jian-tao, FANG Yi-tian. Occurrence modes of sodium species in sodium-rich coals[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(10): 1172-1177. shu

Occurrence modes of sodium species in sodium-rich coals

1.
Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
The Sci-Tech Academy of Shanxi Coal Imp. & Exp. Group Co. Ltd., Taiyuan, 030006, China
4.
Post-Doctoral Research Center of Shanxi Coal Imp. & Exp. Group Co. Ltd., Taiyuan, 030006, China

Corresponding author: ZHAO Jian-tao, zhaojt@sxicc.an.cn
Received Date: 16 June 2017
Revised Date: 25 July 2017

Fund Project: The project was supported by the National Natural Science Foundation of China (21576276, 21506241) and Strategic Priority Research Program of the Chinese Academy of Sciences (XDA07050100)the National Natural Science Foundation of China 21506241the National Natural Science Foundation of China 21576276Strategic Priority Research Program of the Chinese Academy of Sciences XDA07050100

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The occurrence modes of sodium species and corresponding content distributions in sodium-rich coals were investigated through a series of analytical methods. The results indicate that for the vast majority of coals sodium are mainly in the form of water-soluble form, then organic form, and the content of insoluble form is negligible. Among them, the water-soluble sodium is mainly presented as nitratine (NaNO₃), halite (NaCl) and hydrated ion (Na·xH₂O). The organic sodium is mainly presented as carboxyl sodium (-COONa), while the insoluble sodium mainly occurs as albite (NaAlSi₃O₈).
- sodium-rich coal,
- occurrence mode,
- sodium
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