Experimental investigation on the oxy-fuel co-combustion behavior of anthracite coal and spent coffee grounds
详细信息 查看全文
- 作者：Yuanhang Wei ; Meiqian Chen ; Shibo Niu…
- 刊名：Journal of Thermal Analysis and Calorimetry
- 出版年：2016
- 出版时间：June 2016
- 年：2016
- 卷：124
- 期：3
- 页码：1651-1660
- 全文大小：771 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Sciences
Polymer Sciences
Physical Chemistry
Inorganic Chemistry
Measurement Science and Instrumentation - 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
- ISSN：1572-8943
- 卷排序：124
文摘
The combustion behaviors of anthracite coal/spent coffee grounds under oxy-fuel condition were assessed by a thermal analysis technique. At heating rates of 10–40 K min−1, the ignition temperatures and burnout temperatures of all anthracite coal/spent coffee grounds blends decreased with increasing the blending ratios of biomass or oxygen contents in O2/CO2 atmospheres. The ignition temperatures of all samples at the similar oxygen content in oxy-fuel with that of air were higher than that in air atmosphere. In 30 % O2/70 % CO2 atmosphere, the average ignition and comprehensive performance indices of anthracite coal/spent coffee grounds at 40 K min−1 were about 4 times and 18 times more than that at 10 K min−1, respectively. At heating rate of 20 K min−1, the comprehensive performance indices of all samples in 30 % O2/70 % CO2 were very close to those in air. In air and O2/CO2 (21–40 % oxygen contents) atmospheres, the activation energies of release and combustion for volatile matters in the blends ranged from 33.66 to 147.32 kJ mol−1. Activation energies of char combustion in the blends ranged from 21.06 to 109.49 kJ mol−1. There were more significant synergistic effects between anthracite coal and spent coffee grounds during co-combustion in air and oxy-fuel atmospheres at 40 K min−1.KeywordsCombustionAnthracite coalSpent coffee groundsOxy-fuelHeating rateKinetics