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| Kinetic Analysis and Effect of Catalysts on Combustion Characteristics of Pulverized Coal |
| HE Xin-jie,ZHANG Jian-liang,QI Cheng-lin,KONG De-wen,MA Chao,LU Wei-jia |
| （School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083， China） |
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Abstract The effect of four catalysts, CaO, Fe2O3, MgO and MnO2 on non-isothermal combustion characteristics and dynamic parameters of clean coal and lean coal was investigated with thermal analyzer. The results show that when the content of catalysts is 1%, four catalysts can reduce the initial burning temperature of two coals and CaO is the most effective catalyst to accelerate coal combustion. As transition metal oxide, MnO2 shows an optimum effect on reducing the initial burning temperature of two coals than Fe2O3 when the content of catalysts is fewer than 2%, but this condition changes when the content of catalysts is 2% especially when the two catalysts are added in lean coal. Four catalysts can decrease activation energy of two coals and CaO increases combustion process best during reaction stage 1. CaO accelerates combustion process of clean coal for best results and four catalysts have no significant effect to accelerate combustion process of lean coal during reaction stage 2.
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Received: 01 August 2011
Published: 30 July 2012
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2012, Vol. 47 
