Kinetics of NiO and NiCl₂ Hydrogen Reduction as Precursors and Properties of Produced Ni/Al₂O₃ and Ni-Pd/Al₂O₃ Catalysts

Table 1

Reaction mechanisms and the corresponding equations.

	Equations	Reaction mechanism
		One-dimensional diffusion
		Two-dimensional diffusion (cylindrical symmetry)
		Three-dimensional diffusion (spherical symmetry, Jander equation)
		Three-dimensional diffusion (spherical symmetry, Ginstling-Braunshtein equation)
		First-order reaction (unimolecular decay law)
		Random nucleation (Avrami I equation)
		Random nucleation (Avrami II equation)
		Phase-boundary controlled (cylindrical symmetry)
		Phase-boundary controlled (spherical symmetry)