AN IMPROVED MODEL FOR FIXED-BED COAL COMBUSTION AND GASIFICATION

被引：44
作者：
RADULOVIC, PT
GHANI, MU
SMOOT, LD
机构：
[1] Advanced Combustion Engineering Research Center, Brigham Young University, Provo
来源：
FUEL | 1995年 / 74卷 / 04期
基金：
美国国家科学基金会;
关键词：
COMBUSTION; GASIFICATION; MODELING;
D O I：
10.1016/0016-2361(95)98362-I
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
An improved one-dimensional model for countercurrent oxidation and gasification of coal in fixed or slowly moving beds has been developed. The model incorporates an advanced devolatilization submodel that can predict the evolution rates and the yields of individual gas species and tar. A split, back-and-forth, shooting method is implemented to satisfy exactly the boundary conditions for both the feed coal and the feed gas streams. An option to switch between equilibrium and non-equilibrium gas phase composition has been added. The model yields improved predictions for product gas composition and product tar flow rate. The model predictions are compared with the experimental data for two coals: a Jetson bituminous coal and a Rosebud subbituminous coal. An illustrative simulation for an atmospheric, airblown, dry ash, Wellman-Galusha gasifier, fired with the Jetson bituminous coal, is presented. Areas which need additional improvements are identified.
引用
收藏
页码：582 / 594
页数：13
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