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. shu

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

YANG Yan-mei ^1,2 ,
ZHANG Yang ¹ ,
ZHANG Hai ^1,, ,
WU Yu-xin ¹ ,
LIU Qing ¹ ,
LÜ Jun-fu ¹

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

Corresponding author: ZHANG Hai, haizhang@mail.tsinghua.edu.cn
Received Date: 4 January 2018
Revised Date: 8 February 2018

Fund Project: National Science and Technology Support Project of China 2015BAA04B02The project was supported by National Science and Technology Support Project of China (2015BAA04B01, 2015BAA04B02)National Science and Technology Support Project of China 2015BAA04B01

Figures(4)

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
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