Citation: WU Suo-zhen, LUN Fei, TU Ka-bin, WANG Qing-song, CHENG Jian-lin, ZHANG Hong. Form and distribution of sulfur in pulverized Jincheng coal and their influence on its ash fusibility[J]. Journal of Fuel Chemistry and Technology, ;2020, 48(6): 649-654. shu

Form and distribution of sulfur in pulverized Jincheng coal and their influence on its ash fusibility

1.
Jiangsu Fangtian Electric Power Technology Co. LTD, Nanjing 211100, China
2.
China University of Mining and Technology School of Chemical Engineering, Xuzhou 221116, China
3.
Zhoushan Entry-exit Inspection and Quarantine Bureau, Zhoushan 316021, China

Corresponding author: LUN Fei, 799982823@qq.com
Received Date: 30 March 2020
Revised Date: 19 May 2020

Fund Project: Jiangsu Fangtian Electric Power Technology Co., Ltd KJXM-0146the National Natural Science Foundation of China and Shanxi Low Carbon Coal Foundation U1510106The project was supported by the National Natural Science Foundation of China and Shanxi Low Carbon Coal Foundation (U1510106) and Jiangsu Fangtian Electric Power Technology Co., Ltd (KJXM-0146)

Figures(6)

Forms and distribution of sulfur in pulverzied Jincheng coal were analyzed, and their influence on ash fusion temperature (AFT) was studied. With the float-sink method, the whole coal was separated into four density fractions, i.e. < 1.6, 1.6-1.7, 1.7-2.0 and >2.0 g/cm³. The distribution of sulfur content and their forms were analyzed. SO₃ content and AFT of the coal samples ashed at 450, 815, 1000, and 1300℃ were determined. XRF and XRD were used to reveal the mechanism. The results show that sulfur in pulverized Jincheng coal is not evenly distributed in different density fractions, mainly concentrated in >2.0 g/cm³. With increase of the density, content of organic sulfur decreases rapidly, while those of sulphate sulfur and pyrite increase significantly. With increasing ashing temperature, sulfur contents in the whole coal and density fractions decrease. At 450℃, 87% sulfur is vaporized and at 1300℃ almost all sulfur is vaporized. Different density fraction shows different AFT, with >2.0 g/cm³ having the lowest AFT. Besides, AFT of >2.0 g/cm³ increases with rising ashing temperature. Mechanism study shows that the differentiation of AFT in different density fraction can be attributed to their chemical composition. The increase of AFT of >2.0 g/cm³ with ashing temperature is mainly due to sulfur SO₃ content in the ash residual.
- Jincheng coal,
- forms of sulfur,
- density fraction,
- ash fusibility
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沈阳化工大学材料科学与工程学院沈阳 110142