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| Investigation on Co-Combustion Kinetics of Anthracite and Waste Plastics by Thermogravimetric Analysis |
| LIU Zheng-jian,REN Shan,ZHANG Jian-liang,LIU Wei-jian,XING Xiang-dong,SU Bu-xin |
| State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract In order to effectively recycle resource for the benefit of the global environment, the utilization of waste plastics as auxiliary injectant for blast furnaces is becoming increasingly important. Combustion kinetics of plastics-coal blends with 0, 10%, 20% and 40% waste plastics (WP) are investigated separately by thermogravimetric analysis (TGA) from ambient temperature to 900 �� in air atmosphere. These blends are combusted at the heating rates of 5, 10 and 20 ��/min. The results indicate that, with the increase of waste plastics content, the combustion processes of blends could be divided into one stage, two stages and three stages. The waste plastics content and heating rates have important effects on the main combustion processes of blends. With the increase of waste plastics content, the ignition temperature and the final combustion temperature of blends tend to decrease, while the combustion reaction becomes fiercer. With the increase of the heating rate, the ignition temperature, the mass loss rate of the peaks and the final combustion temperature of blends combustion tend to increase. The Flynn-Wall-Ozawa (FWO) iso-conversional method is used for the kinetic analysis of the main combustion process. The results indicate that, when the waste plastics content varied from 0 to 40%, the values of activation energy increase from 126.05 to 184.12 kJ /mol.
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Received: 20 September 2011
Published: 30 October 2012
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| Fund:National Key Technology R&D Program in the 11th Five year Plan of China |
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Corresponding Authors:
REN Shan
E-mail: jeopardize@126.com
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2012, Vol. 19 
