2-STEP GASIFICATION OF FLASH PYROLYSIS AND HYDROPYROLYSIS CHARS FROM LOW-RANK CANADIAN COALS

被引:10
作者
MIURA, K [1 ]
MAKINO, M [1 ]
SILVESTON, PL [1 ]
机构
[1] UNIV WATERLOO,DEPT CHEM ENGN,WATERLOO N2L 3G1,ONTARIO,CANADA
关键词
Coal--Pyrolysis - Mathematical Models;
D O I
10.1021/ef00019a005
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
In this study, chars produced by flash pyrolysis or hydropyrolysis of low-rank Canadian coals were gasified in an air atmosphere using the temperature-programmed-reaction (TPR) method. It was observed that some chars gasify in what appears to be two steps. It is possible to fit the two-step data by use of a simple model that fits the continuous weight loss data well by assuming parallel gasification of two chars of different reactivities. It seems likely that two-step gasification indicates chars of nonuniform reactivity or uneven ash distribution. © 1990, American Chemical Society. All rights reserved.
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页码:24 / 27
页数:4
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