Determination of the intrinsic kinetics of iron oxide reduced by carbon monoxide in an isothermal differential micro-packed bed

doi:10.1016/j.cjche.2015.01.006

Chin.J.Chem.Eng. ›› 2015, Vol. 23 ›› Issue (6): 974-980.DOI: 10.1016/j.cjche.2015.01.006

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Determination of the intrinsic kinetics of iron oxide reduced by carbon monoxide in an isothermal differential micro-packed bed

Baolin Hou, Haiying Zhang, Hongzhong Li, Qingshan Zhu

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

Received:2014-09-02 Revised:2014-12-16 Online:2015-07-09 Published:2015-06-28
Contact: Hongzhong Li
Supported by:
Supported by the State Key Development Program for Basic Research of China (2015CB251402) and the National Natural Science Foundation of China (21206159).

Determination of the intrinsic kinetics of iron oxide reduced by carbon monoxide in an isothermal differential micro-packed bed

Baolin Hou, Haiying Zhang, Hongzhong Li, Qingshan Zhu

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

通讯作者: Hongzhong Li
基金资助:
Supported by the State Key Development Program for Basic Research of China (2015CB251402) and the National Natural Science Foundation of China (21206159).

Abstract

Abstract: The intrinsic kinetics of iron oxide reduced by carbon monoxide is evaluated by a method of online measuring concentration of off-gas in an isothermal differential micro-packed bed. Under the condition of getting away from the influence of gas diffusion and gas-solid heat transfer and mass transfer, the reaction of Fe₂O₃ to Fe₃O₄, Fe₃O₄ to FeO and FeO to Fe in the process of single reaction can be clearly distinguished from each other, and the relevant activation energy is characterized to be 75.4, 74.4, and 84.0 kJ·mol^-1, respectively. Therefore, the change of surface area in the reaction process due to losing oxygen could be easily calculated by combining it with pre-exponential parameters of Arrhenius equations. In conclusion, these kinetic parameters are verified by the experimental data for the process of ore reduced by carbon monoxide in a packed bed.

摘要： The intrinsic kinetics of iron oxide reduced by carbon monoxide is evaluated by a method of online measuring concentration of off-gas in an isothermal differential micro-packed bed. Under the condition of getting away from the influence of gas diffusion and gas–solid heat transfer and mass transfer, the reaction of Fe₂O₃ to Fe₃O₄, Fe₃O₄ to FeO and FeO to Fe in the process of single reaction can be clearly distinguished from each other, and the relevant activation energy is characterized to be 75.4, 74.4, and 84.0 kJ·mol^-1, respectively. Therefore, the change of surface area in the reaction process due to losing oxygen could be easily calculated by combining it with pre-exponential parameters of Arrhenius equations. In conclusion, these kinetic parameters are verified by the experimental data for the process of ore reduced by carbon monoxide in a packed bed.

Baolin Hou, Haiying Zhang, Hongzhong Li, Qingshan Zhu. Determination of the intrinsic kinetics of iron oxide reduced by carbon monoxide in an isothermal differential micro-packed bed[J]. Chin.J.Chem.Eng., 2015, 23(6): 974-980.

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Determination of the intrinsic kinetics of iron oxide reduced by carbon monoxide in an isothermal differential micro-packed bed

Determination of the intrinsic kinetics of iron oxide reduced by carbon monoxide in an isothermal differential micro-packed bed

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