Zeitschrift für anorganische und allgemeine Chemie · 1977 · 12 citations · 4 references
Natural SciencesChemistryMaterials ScienceChemical KineticsSurface ChemistrySurface ScienceKinetic ModelingSurface DiffusionSurface KineticsSurface OxidationSurface Reaction KineticsSurface ReactionsDiffusion-limited Surface ReactionsSurface Chemistry Of OxidationSurface Diffusion KineticsSurface Layer ProcessesSurface Reaction DynamicsSurface Reaction MechanismsTemperature-dependent Reaction KineticsTemperature-dependent Reaction Rate
Abstract For the solid state reactions in powdery state, two steps reaction was assumed, initial rapid surface reaction and later diffusion controlled reaction which obeys J ANDER'S kinetics after completion of the surface layer. In the case of much larger diffusion rate in the surface layer, the measured fraction of reaction, α m , was replaced by (α m – α s )/(1 – α s ) in J ANDER'S rate equation where α s is the fraction of reaction corresponding to the initial surface reaction. The value of α s was estimated be the trial and error method. The surface layer thickness, x s , calculated from α s increased from 300 to 2 400 Å for FeVO 4 formation and 70 to 270 Å for the oxidation of CoO [5], with an increase in reaction temperature.
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Kinetic Model for Solid-State Reactions
R. E. Carter · The Journal of Chemical Physics · 1961 · 444 citations