Reduction behavior and reaction kinetics of iron ore-biomass composite pellets

被引：0

作者：

Luo, Si-Yi ^{[1
]}

Ma, Chen ^{[1
]}

Sun, Peng-Peng ^{[1
]}

机构：

[1] School of Environmental and Municipal Engineering, Qingdao Technological University, Qingdao

来源：

Gongcheng Kexue Xuebao/Chinese Journal of Engineering | 2015年 / 37卷 / 02期

关键词：

Biomass; Direct reduction; Ironmaking; Pellets; Reaction kinetics; Syngas;

D O I：

10.13374/j.issn2095-9389.2015.02.002

中图分类号：

学科分类号：

摘要：

The reduction reaction rate, reduction degree, surface microstructure and weight loss of composite pellets with different components under biomass syngas atmosphere were investigated to illustrate the effects of biomass addition in pellets on the reduction behavior and reaction kinetics. The porosity of pellets with the addition of biomass is higher than that without the addition of biomass, which is favorable to heat and mass transfer of the reduction process, increases the reduction degree of products and decreases the apparent activation energy of reaction. The reduction of pellets was carried out in the manner of a shrinking core model. In the range of 1123 to 1323 K, the rate-controlling mechanism of reduction for these two kinds of pellets is interfacial chemical reaction. The addition of biomass in pellets can improve the interfacial chemical reaction, and thus the apparent activation energy of reaction decreases from 95.448 kJ·mol-1 to 68.131 kJ·mol-1. ©, 2015 All right reserved.

引用

页码：150 / 156

页数：6

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