Citation: SONG Wei-jian, SONG Guo-liang, QI Xiao-bin, LÜ Qing-gang. Effect of pretreatment methods on the determination of alkali metal content in high alkali metal Zhundong coal[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(02): 162-167. shu

Effect of pretreatment methods on the determination of alkali metal content in high alkali metal Zhundong coal

1.
1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;
2.
2. University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: SONG Guo-liang,
Received Date: 11 September 2015
Available Online: 5 November 2015
Fund Project: 中国科学院战略性先导科技专项(A类)(XDA07030100) (A类)(XDA07030100)国家国际科技合作专项(2014DFG61680)资助. (2014DFG61680)

High alkali metal coal from four coal mines in Zhundong coalfield and its gasification fly ash were used to investigate the occurrence of alkali metal with five pretreatment methods including low temperature ashing,microwave digestion,national standards,cascade extraction and oxygen bomb combustion.The results show that the sodium in the high alkali metal coal exists mainly in the water soluble form,and the potassium is in the water insoluble form;The method of oxygen bomb combustion is the optimum one to determine the content of Na and K in high alkali coal and gasification fly ash,and the method of cascade extraction is also a better one to determine the content of Na.
- alkali metal determination,
- pretreatment methods,
- low temperature ashing,
- microwave digestion,
- oxygen bomb combustion
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