THE OXIDATION OF PYRITE

被引：7
|
作者：
NAKAMURA, H [1 ]
SATO, S [1 ]
HARA, Y [1 ]
机构：
[1] ASAHI CHEM IND CO LTD,EXPLOSIVES LAB,IND EXPLOSIVE SECT,NOBEOKA 882,JAPAN
来源：
JOURNAL OF HAZARDOUS MATERIALS | 1994年 / 37卷 / 02期
关键词：
Activation energy - Fractional oxidation versus time curves - Interface reaction process - Shrinking unreacted core model;
D O I：
10.1016/0304-3894(93)E0095-J
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The oxidation of pyrite ore in air was studied using a fixed-bed flow reactor. Under isothermal conditions, this oxidation showed a maximum rate during the initial stage and a linear decreasing rate thereafter, and the fractional oxidation versus time curves were in good agreement with a shrinking unreacted-core model. The oxidation rate was affected by the particle size of the pyrite ore. A large particle showed a small initial reaction rate and a large activation energy. Besides, the rate-determining step of a large particle was found to be an interface reaction process while for fine particles it is a diffusion process.
引用
收藏
页码：253 / 263
页数：11
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