Study on Kinetics of Iron Oxide Reduction by Hydrogen

›› 2012, Vol. 20 ›› Issue (1): 10-17.

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Study on Kinetics of Iron Oxide Reduction by Hydrogen

HOU Baolin, ZHANG Haiying, LI Hongzhong, ZHU Qingshan

State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

Received:2011-06-17 Revised:2011-12-06 Online:2012-05-03 Published:2012-02-28
Supported by:
Supported by the National Natural Science Foundation of China (20736004);the State Key Development Program for Basic Research of China (2007CB613502)

Study on Kinetics of Iron Oxide Reduction by Hydrogen

侯宝林, 张海英, 李洪钟, 朱庆山

State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

通讯作者: LI Hongzhong,E-mail:hzli@home.ipe.ac.cn;ZHU Qingshan,E-mail:qszhu@home.ipe.ac.cn
基金资助:
Supported by the National Natural Science Foundation of China (20736004);the State Key Development Program for Basic Research of China (2007CB613502)

Abstract

Abstract: Kinetics parameters of iron oxide reduction by hydrogen were evaluated by the isothermal method in a differential micro-packed bed.Influence of external diffusion,internal diffusion and heat transfer on the intrinsic reaction rate was investigated and the conditions free of internal and external diffusion resistance have been determined.In the experiments,in order to correctly evaluate the intrinsic kinetics parameters for reducing Fe₂O₃ to Fe₃O₄,the reaction temperatures were set between 440℃ and 490℃.However,in order to distinguish the reduction of Fe₃O₄ to FeO from that of FeO to Fe,the reaction temperature in the experiment was set to be greater than 570℃.Intrinsic kinetics of iron oxide reduction by hydrogen was established and the newly established kinetic models were validated by the experimental data.

Key words: isothermal method, reduction kinetics, iron oxide, packed bed, hydrogen reduction

摘要： Kinetics parameters of iron oxide reduction by hydrogen were evaluated by the isothermal method in a differential micro-packed bed.Influence of external diffusion,internal diffusion and heat transfer on the intrinsic reaction rate was investigated and the conditions free of internal and external diffusion resistance have been determined.In the experiments,in order to correctly evaluate the intrinsic kinetics parameters for reducing Fe₂O₃ to Fe₃O₄,the reaction temperatures were set between 440℃ and 490℃.However,in order to distinguish the reduction of Fe₃O₄ to FeO from that of FeO to Fe,the reaction temperature in the experiment was set to be greater than 570℃.Intrinsic kinetics of iron oxide reduction by hydrogen was established and the newly established kinetic models were validated by the experimental data.

关键词: isothermal method, reduction kinetics, iron oxide, packed bed, hydrogen reduction

CLC Number:

O643.12

HOU Baolin, ZHANG Haiying, LI Hongzhong, ZHU Qingshan. Study on Kinetics of Iron Oxide Reduction by Hydrogen[J]. , 2012, 20(1): 10-17.

侯宝林, 张海英, 李洪钟, 朱庆山. Study on Kinetics of Iron Oxide Reduction by Hydrogen[J]. , 2012, 20(1): 10-17.

References

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Study on Kinetics of Iron Oxide Reduction by Hydrogen

Study on Kinetics of Iron Oxide Reduction by Hydrogen

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