TRANSFORMATIONS OF IRON MINERALS DURING COAL OXIDATION

被引：27

作者：

COLE, DA ^{[1
]}

SIMMONS, GW ^{[1
]}

HERMAN, RG ^{[1
]}

KLIER, K ^{[1
]}

CZAKONAGY, I ^{[1
]}

机构：

[1] LEHIGH UNIV,DEPT CHEM,SINCLAIR LAB 7,BETHLEHEM,PA 18015

来源：

FUEL | 1987年 / 66卷 / 09期

关键词：

COAL RESEARCH;

D O I：

10.1016/0016-2361(87)90062-7

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：

Oxidative transformations of iron minerals in weathered Illinois No. 6 coal were investigated by Moessbauer spectroscopy and X-ray powder diffraction. Temperature ranges were determined for the conversion of pyrite to ferrous sulphate and ferric hydroxysulphate and of ferric hydroxysulphate to ferric oxysulphate and ferric oxide. Most pronounced mineral transformations occurred at temperatures at which the concentration of thermally produced organic free radicals was a maximum and at which extensive weight loss of the organic coal matter began. These results suggest that the oxidation of iron minerals and the free radical oxidation of the organic matter in coal may be associated with each other.

引用

页码：1240 / 1248

页数：9

共 38 条

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