Experimental study on alkali metal transformation during high-sodium Zhundong coal pyrolysis

SONG Wei-jian; SONG Guo-liang; ZHANG Hai-xia; FAN Jin-long; LÜ Qing-gang

Volume 43 Issue 01

Jan. 2015

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SONG Wei-jian, SONG Guo-liang, ZHANG Hai-xia, FAN Jin-long, LÜ Qing-gang. Experimental study on alkali metal transformation during high-sodium Zhundong coal pyrolysis[J]. Journal of Fuel Chemistry and Technology, 2015, 43(01): 16-21.

Citation:

SONG Wei-jian, SONG Guo-liang, ZHANG Hai-xia, FAN Jin-long, LÜ Qing-gang. Experimental study on alkali metal transformation during high-sodium Zhundong coal pyrolysis[J]. Journal of Fuel Chemistry and Technology, 2015, 43(01): 16-21.

Citation:

SONG Wei-jian, SONG Guo-liang, ZHANG Hai-xia, FAN Jin-long, LÜ Qing-gang. Experimental study on alkali metal transformation during high-sodium Zhundong coal pyrolysis[J]. Journal of Fuel Chemistry and Technology, 2015, 43(01): 16-21.

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Experimental study on alkali metal transformation during high-sodium Zhundong coal pyrolysis

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

Received Date: 2014-08-07
Rev Recd Date: 2014-10-15
Publish Date: 2015-01-30

Abstract

Abstract

The alkali metal transformation during high-sodium Zhundong coal pyrolysis was investigated in a vertical tubular furnace reactor. The release characteristics, modes of occurrence of Na, the microstructure of char samples after pyrolysis at different temperatures were examined by using inductive coupled plasma equipped with atomic emission spectrometer(ICP-AES), X-ray diffractometry (XRD) and scanning electron microscopy with an energy dispersive X-ray spectrometer(SEM-EDX), respectively. Meanwhile, the release forms of alkali metal from coal were simulated by Fact sage 6.1. The results show that a part of sodium in high-sodium coal is released during pyrolysis, starting to release at 600 ℃ and reaching to 40.2% of release at 900 ℃. It is concluded that Na in the coal is released as NaCl, and no molten matter is found when the pyrolysis temperature is below 900 ℃.
- high sodium coal,
- pyrolysis,
- transformation of Na,
- thermodynamic equilibrium calculation

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References(21)

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