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

fYear

2011

fDate

25-28 March 2011

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2011 Asia-Pacific

Conference_Location

Wuhan

ISSN

2157-4839

Print_ISBN

978-1-4244-6253-7

Type

conf

DOI

10.1109/APPEEC.2011.5748711

Filename

5748711