Research on Reduction of Fe2O3 by Biomass Sawdust

doi:10.1007/s12204-017-1833-5

上海交通大学学报（英文版） ›› 2017, Vol. 22 ›› Issue (3): 280-285.doi: 10.1007/s12204-017-1833-5

Research on Reduction of Fe2O3 by Biomass Sawdust

LIU Xiaominga,b* (刘晓明), ZHANG Hongleia (张宏雷), LI Suqina (李素芹),LI Dongshenga (李东升), HUANG Dongboa (黄冬波)

(a. School of Metallurgical and Ecological Engineering; b. Beijing Key Laboratory of Green Recycling and Extraction of Metals, University of Science and Technology Beijing, Beijing 100083, China)

出版日期:2017-06-02 发布日期:2017-06-04
通讯作者: LIU Xiaoming (刘晓明) E-mail:liuxm@ustb.edu.cn

Research on Reduction of Fe2O3 by Biomass Sawdust

LIU Xiaominga,b* (刘晓明), ZHANG Hongleia (张宏雷), LI Suqina (李素芹),LI Dongshenga (李东升), HUANG Dongboa (黄冬波)

(a. School of Metallurgical and Ecological Engineering; b. Beijing Key Laboratory of Green Recycling and Extraction of Metals, University of Science and Technology Beijing, Beijing 100083, China)

Online:2017-06-02 Published:2017-06-04
Contact: LIU Xiaoming (刘晓明) E-mail:liuxm@ustb.edu.cn

摘要/Abstract

摘要： The research on biomass reduction of Fe2O3 was carried out by using sawdust as reductant. The direct reducing agents in the biomass magnetization process were determined by comparing various biomass pyrolysis products with the reduction degree (divalent iron content in total iron), reduction temperature range and valence change of Fe2O3 in the reduction process. The microstructure variation of Fe2O3 at different stages was also analyzed by scanning electron microscopy (SEM). Nonisothermal thermogravimetric analysis (TGA) was applied to explore the thermal reduction process. The results show that the direct reducing substances in the biomass reaction with Fe2O3 are H2 and bio-oil, and the reduction process can be divided into two steps: biomass pyrolyzing to release H2 and bio-oil, and reductive volatiles reacting with Fe2O3. The two steps are relatively independent. The kinetic of the reduction reaction follows a first-order reaction kinetic model, with 88.99 kJ/mol activation energy and 9.55 × 108 min ?1 frequency factor.

关键词: biomass, reduction, Fe2O3, kinetics

Abstract: The research on biomass reduction of Fe2O3 was carried out by using sawdust as reductant. The direct reducing agents in the biomass magnetization process were determined by comparing various biomass pyrolysis products with the reduction degree (divalent iron content in total iron), reduction temperature range and valence change of Fe2O3 in the reduction process. The microstructure variation of Fe2O3 at different stages was also analyzed by scanning electron microscopy (SEM). Nonisothermal thermogravimetric analysis (TGA) was applied to explore the thermal reduction process. The results show that the direct reducing substances in the biomass reaction with Fe2O3 are H2 and bio-oil, and the reduction process can be divided into two steps: biomass pyrolyzing to release H2 and bio-oil, and reductive volatiles reacting with Fe2O3. The two steps are relatively independent. The kinetic of the reduction reaction follows a first-order reaction kinetic model, with 88.99 kJ/mol activation energy and 9.55 × 108 min ?1 frequency factor.

Key words: biomass, reduction, Fe2O3, kinetics

中图分类号:

TF 111.13

LIU Xiaominga,b* (刘晓明), ZHANG Hongleia (张宏雷), LI Suqina (李素芹),LI Dongshenga (李东升. Research on Reduction of Fe2O3 by Biomass Sawdust[J]. 上海交通大学学报（英文版）, 2017, 22(3): 280-285.

LIU Xiaominga,b* (刘晓明), ZHANG Hongleia (张宏雷), LI Suqina (李素芹),LI Dongshenga (李东升), HUANG Dongboa (黄冬波). Research on Reduction of Fe2O3 by Biomass Sawdust[J]. Journal of shanghai Jiaotong University (Science), 2017, 22(3): 280-285.

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