物理化学学报 >> 1988, Vol. 4 >> Issue (03): 332-336.doi: 10.3866/PKU.WHXB19880321
研究简报 上一篇
王文祥; 徐杰; 马福勤
收稿日期:
修回日期:
发布日期:
通讯作者:
Wang Wenxiang*; Xu Jie; Ma Fuqin
Received:
Revised:
Published:
Contact:
Abstract: The kinetic behavior of reduction for iron (III) oxides was studied by means of TG-DTA thermal analyzer under temperature programed and isothermal conditions with Hydrogen as the reducing gas. The main results show that: (I) using single kinetic model to fit the overall reductive reactions is impossible. The reduction by hydrogen proceeds in several steps: Fe_2O3 ~A→Fe_3O_4 ~B→FeO ~C→FeIt can be treated with different kinetic equations for different periods. (II) During the first period (including the step A and step B), the main process is nucleation, growth and transformation of Fe_3O_4; the Erofeev equation is better than the Contracting Sphere Model. During the second period (Step C), the main process is reduction of FeO, the Cubic Net Model may be satisfied.(III) The Fe_3O_4 and FeO are formed as intermediates. The transformation of Fe_3O_4 is the controlling step. FeO may react and vanish rapidly at higher temperature.(IV) The kinetic parameters in different periods were obtained. The machanism of the reaction was proposed and explained in some detail.
王文祥;徐杰;马福勤. 氧化铁(Ⅲ)还原动力学研究[J]. 物理化学学报, 1988, 4(03): 332-336.
Wang Wenxiang*; Xu Jie; Ma Fuqin. STUDIES ON KINETICS OF REDUCTION OF IRON (Ⅲ) OXIDES[J]. Acta Phys. -Chim. Sin., 1988, 4(03): 332-336.
0 /
导出引用管理器 EndNote (中文内容)|EndNote (英文内容)| Reference Manager|ProCite|BibTeX|RefWorks
链接本文: http://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB19880321
http://www.whxb.pku.edu.cn/CN/Y1988/V4/I03/332
Cited