Citation: YANG Yan-mei, ZHANG Hai, LÜ Jun-fu, YANG Hai-rui. Experimental study on flash pyrolysis of pulverized coals in Py-GC[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(1): 9-15. shu

Experimental study on flash pyrolysis of pulverized coals in Py-GC

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Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

Corresponding author: ZHANG Hai,
Received Date: 18 July 2014
Available Online: 29 September 2014
Fund Project: 国家高技术研究发展计划(863计划, 2013AA051202) (863计划, 2013AA051202) 中国科学院战略性先导科技专项(XDA0402020209). (XDA0402020209)

Flash pyrolysis characteristics of four Chinese coals were studied in a Curie-pointed reactor and gas chromatography (Py-GC) combined system. The yield of volatile matter (VM) and evolution of gaseous VM components were measured. It is found that ≥ 50% of VM is released at the early stage (t ≤ 2 s) of flash pyrolysis. It needs ~10 s to totally devolatilize 1 mg coal in the Curie-point reactor with the sample wrapped in a ferromagnetic foil. The yields of gaseous VM component are in the order of H₂ > CH₄ > CO > CO₂ > C2(C₂H₆, C₂H₄) > C3 (C₃H₈, C₃H₆). The yield of VM increases as the pyrolysis temperature increases. Under the same pyrolysis condition, high VM content coals released more VM than the low VM content ones. Yields of H₂ and CH₄ increase greatly with the pyrolysis temperature. Yields of CO and CO₂ depend on both the content of oxygen in the coal and pyrolysis temperature. Amounts of C2 and C3 gases are relatively much less than the others, accounting for less than 5% in volume in the gaseous VM.
- curie-point reactor,
- gas chromatography,
- flash pyrolysis,
- volatile matter,
- coal type
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