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Reduction Kinetics of Metal Oxides by Hydrogen
Author(s) -
Dang Jie,
Chou KuoChih,
Hu XiaoJun,
Zhang GuoHua
Publication year - 2013
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201200242
Subject(s) - kinetics , hydrogen , isothermal process , diffusion , metal , chemistry , chemical kinetics , thermodynamics , nickel , oxide , reduction (mathematics) , materials science , inorganic chemistry , organic chemistry , physics , quantum mechanics , geometry , mathematics
In this paper, a new kinetic model has been developed for reduction of metal oxides with hydrogen under both isothermal and non‐isothermal conditions. This model describes the kinetics of single reductive reaction and double reductive reactions by considering the diffusion and chemical reaction controlling mechanisms. In particular, the model is in the analytic form of expressing the reduction extent as an explicit function of time, temperature, radius of the particle, and hydrogen partial pressure, which is convenient for using and theoretical analysis. The reduction kinetics of nickel oxide, natural ilmenite, and Fe 2 MoO 4 agree well with the theoretical results by the present model.