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Kinetics of the dissolution of cobalt, nickel, and iron oxides in sulfuric acid |
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| Authors: | E. A. Yakusheva I. G. Gorichev T. K. Atanasyan Yu. A. Lainer |
| Affiliation: | 1. Bauman State Technical University, Vtoraya Baumanskaya ul. 5, Moscow, 107005, Russia 2. Moscow State Pedagogical University, Moscow, Russia 3. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991, Russia |
| Abstract: | The modeling of dissolution of cobalt, nickel, and iron oxides in sulfuric acid shows that the rate-determining step of the dissolution is the passage of oxide complexes formed on the surface of oxide particles to a solution. A system analysis of the dissolution curves (??-??) of the oxides is developed to calculate the kinetic parameters ( $n_{H^ + } $ ,E a). Cobalt oxide Co3O4 dissolves in H2SO4 more rapidly than nickel and iron oxides (Ni2O3 and Fe2O3). |
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