Title :
Research on Lean Coal Char Combustion with Fractal Reaction Model
Author :
Liang Xiujun ; Yan Weiping
Author_Institution :
Key Lab. of Condition Monitoring & Control for Power Plant Equip. of Minist. of Educ., North China Electr. Power Univ., Baoding, China
Abstract :
A time-integral equation for high-temperature combustion kinetics of coal char is built based on fractal theory.. TGA temperature-programmed analysis was implemented for char combustion of a lean coal. The fractal model fitting curve and the experimental curves were compared. The lean coal char combustion rate is controlled by reaction kinetics in main combustion zone and is controlled by both reaction kinetics and O2 diffusion through the ash layer in the burn-out zone. The fractal model fitting curve is in general agreed with the experimental data.
Keywords :
coal; combustion; curve fitting; diffusion; fractals; integral equations; reaction kinetics; thermal analysis; O2 diffusion; TGA temperature programmed analysis; ash layer; burn out zone; fractal model fitting curve; fractal reaction model; fractal theory; high temperature combustion kinetics; lean coal char combustion; time integral equation; Analytical models; Ash; Coal; Combustion; Films; Fractals; Mathematical model;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2011 Asia-Pacific
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6253-7
DOI :
10.1109/APPEEC.2011.5748711
