Citation: YANG Zhi-rong, MENG Qing-yan, HUANG Jie-jie, WANG Zhi-qing, LI Chun-yu, FANG Yi-tian. Interaction between Shenmu coal and different caking coals during co-pyrolysis[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(6): 641-648. shu

Interaction between Shenmu coal and different caking coals during co-pyrolysis

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: HUANG Jie-jie, huangjj@sxicc.ac.cn
Received Date: 12 March 2018
Revised Date: 9 May 2018

Fund Project: The project was supported by the National Key Research and Development Program (2016YFB 0600401-01)the National Key Research and Development Program 2016YFB 0600401-01

Figures(7)

The pyrolysis characteristic of blended coal and the interaction between Shenmu coal (SMC) and caking coals(Fat coal-FM, gas coal-QM, coking coal-JM) were studied by temperature-programmed thermobalance. The pyrolysis kinetics were analyzed using distributed activation energy model (DAEM). The results indicate that the concentrated release rate of moisture increases and temperature corresponding to the release peak of volatile matter(t_max) for coal blends decreases as increasing SMC blending ratio. The inhibition of blended coal is reduced as increasing SMC blending ratio when pyrolysis temperature surpasses the solidified temperature of metaplast (>460-480 ℃), indicating a poor bonding behavior of metaplast. In addition, the inhibition of blended coal is enhanced and its bonding behavior is improved with increasing heating rate. The effects of relieving swelling pressure and improving dispersity of metaplast gradually reduce as deepening the metamorphic degree of caking coal from QM, FM to JM, since the corresponding temperature for promoting interaction (release of volatile) is below, within, above the plastic temperature range of caking coals, respectively. A comparison of experimental and calculated distributed activation energy model confirms the interaction mechanism of blended coal during co-pyrolysis.
- Shenmu coal,
- caking coals,
- co-pyrolysis,
- interaction,
- distributed activation energy
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沈阳化工大学材料科学与工程学院沈阳 110142