Release behavior of nitrogen in different rank coals during pyrolysis

被引：0
|
作者：
Liu, Qin-Fu [1 ]
Xu, Zhan-Jie [1 ]
Cui, Xiao-Nan [1 ]
Zheng, Qi-Ming [2 ]
机构：
[1] School of Geoscience and Survey Engineering, China University of Mining and Technology (Beijing), Beijing,100083, China
[2] Department of Resources and Environment Engineering, Henan Institute of Engineering, Zhengzhou,451191, China
来源：
Meitan Xuebao/Journal of the China Coal Society | 2015年 / 40卷 / 02期
关键词：
Coal ranks - Five-membered rings - Internal structure - Lower temperatures - Release behaviors - Six-membered rings - Thermo-gravimetric - Volatile components;
D O I：
10.13225/j.cnki.jccs.2014.0320
中图分类号：
学科分类号：
摘要：
The combined thermo gravimetric-infrared-mass spectrometry (TG-IR-MS) analysis were conducted under the temperature of 30℃ to 1100℃ with a heating rate of 10 ℃/min to monitor the different rank coal's pyrolysis and nitrogen release behavior online. The thermal analysis results show that the various nitrides like HCN and NH3 are released from coals during pyrolyzing. The released products vary with different coalification coals during pyrolysis. Nitrogen is mainly released in the forms of NH3 and HCN in gas coal, 1/3 coking coal and coking coal, but NH3 in the high rank coal. The HCN and NH3 come from different types of nitrogen in the coal's internal structure. The HCN may be mainly derived from the edge of five-membered rings pyrrole nitrogen and six-membered rings pyridine nitrogen in coals, the NH3 from the inside quartery nitrogen. The release of NH3 experience two stages: the lower temperature stage at which it is from the elementary pyrolysis of volatile components; and the high temperature stage at which it is from the secondary pyrolysis of volatile components. ©, 2015, China Coal Society. All right reserved.
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页码：450 / 455
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