Experimental and kinetic modeling of oxygen-enriched air combustion of municipal solid waste.
The characteristics of oxygen-enriched air combustion of raw municipal solid waste (MSW) were studied by thermogravimetric analysis. Experiments on oxidative pyrolysis of MSW were carried out under different atmospheres (N(2), N(2):O(2)=7:3, N(2):O(2)=5:5, N(2):O(2)=4:6, and N(2):O(2)=2:8) at 30 degrees C/min. Two distinct peaks of weight loss were obtained according to the derivative thermogravimetric curves; one of them is centered on 305 degrees C with about 40% weight loss, and the second is centered on 420 degrees C with about 20% weight loss. Effects of oxygen concentration on the decomposition process and char combustion were analyzed, and then the process of oxygen-enriched air combustion of MSW was divided into four steps. Kinetic parameters were observed by direct non-linear regressions. According to the obtained data, the apparent activation energy and reaction order decreases along with the combustion process, while that of char combustion increases as oxygen concentration increases.
Liu
Guo Hui
GH
Electric Power College, South China University of Technology, Guangzhou 510640, China. guoh.liu@mail.scut.edu.cn
Ma
Xiao Qian
XQ
Yu
Zhaosheng
Z
D000388:Air / Q000032:analysis*; D002947:Cities; D017745:Incineration; D007700:Kinetics; D008962:Models, Theoretical; D010100:Oxygen / Q000737:chemistry*
D010100:Oxygen