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research-article

Experimental research on catalytic combustion characteristics of inferior coal and sludge mixture

[+] Author and Article Information
YunFei Yan

Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400044, China
yunfeiyan@cqu.edu.cn

Shuai Feng

Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400044, China
shuaifengkelvin@yeah.net

Li Zhang

Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400044, China
lizhang@cqu.edu.cn

Lixian Li

Chongqing Cancer Institute and Hospital and Cancer Center, Chongqing 400030, China
lilixian2010@yahoo.com

Lei Zhang

Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400044, China
593566507@qq.com

Zhongqing Yang

Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400044, China
zqyang@cqu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4037373 History: Received May 17, 2017; Revised July 05, 2017

Abstract

Catalytic effects of metal oxides on combustion characteristics of inferior coal, sludge and their mixture were investigated by thermogravimetric analysis. Combustion and thermal dynamic characteristics including ignition temperatures, apparent activation energy and frequency factors of inferior coal, sludge and their mixture were observed. The catalytic effects and mechanism of combustion were discussed. Results showed that TG and DTG curves of coal and sludge shifted to lower temperature side, the weight losses increased and the ignition performance was improved with the addition of metal oxides CaO, Al2O3 and K2O. The combustion dynamics analysis showed that the apparent activation energy of co-combustion of coal blending sludge decreased by 11-20% and the frequency factors increased by 20-30%. The minimum apparent activation energy and the maximum frequency factors were obtained in the presence of K2O, indicating that the catalytic effect of K2O was most significant.

Copyright (c) 2017 by ASME
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