Study on Kinetics of Iron Oxide Reduction by Hydrogen  

氢气还原氧化铁动力学的研究(英文)

作　　者：HOU Baolin ZHANG Haiying LI Hongzhong ZHU Qingshan 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)

机构地区：[1]State Key Laboratory of Multi-phase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Chinese Journal of Chemical Engineering》2012年第1期10-17,共8页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (20736004);the State Key Development Program for Basic Research of China (2007CB613502)

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 Fe203 to Fe3O4, the reaction temperatures were set between 440 ℃ and 490 ℃. However, in order to distinguish the reduction of Fe304 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.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 deter-mined.In the experiments,in order to correctly evaluate the intrinsic kinetics parameters for reducing Fe2O3 to Fe3O4,the reaction temperatures were set between 440 °C and 490 °C.However,in order to distinguish the reduc-tion of Fe3O4 to FeO from that of FeO to Fe,the reaction temperature in the experiment was set to be greater than 570 °C.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 

分 类 号：O643.12[理学—物理化学]