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| Combustion Property and Kinetic Modeling of Pulverized Coal Based on Non-isothermal Thermogravimetric Analysis |
| Jiu-gang SHAO,Jian-liang ZHANG,Guang-wei WANG,Zhe WANG,Hong-wei GUO |
| School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract Non-isothermal combustion kinetics of two kinds of low volatile pulverized coals (HL coal and RU coal) were investigated by thermogravimetric analysis. The results show that the combustibility of HL coal was better than that of RU coal, and with increasing heating rate, ignition and burnout characteristics of pulverized coal were improved. The volume model (VM), the random pore model (RPM), and the new model (NEWM) in which the whole combustion process is considered to be the overlapping process of volatile combustion and coal char combustion, were used to fit with the experimental data. The comparison of these three fitted results indicated that the combustion process of coal could be simulated by the NEWM with highest precision. When calculated by the NEWM, the activation energies of volatile combustion and coal char combustion are 130.5 and 95.7 kJ��mol-1 for HL coal, respectively, while they are 114.5 and 147.6 kJ��mol-1 for RU coal, respectively.
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Received: 04 December 2013
Published: 13 November 2014
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| Fund:National Basic Research Program of China (973 Program);National Key Technology R&D Program in the 12th Five year Plan of China |
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Corresponding Authors:
Jiangliang
E-mail: Zhang.jianliang@hotmail.com
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2014, Vol. 21 
