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PublisherThe University of Arizona.
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AbstractThe effect of particle size on ilmenite (FeTiO₃) reduction was studied by experimentally determining the intrinsic activation energy and modeling the data using a shrinking core model. The model accounted for both kinetics and ash diffusion control and allowed for a variable diffusivity as a function of conversion. The intrinsic activation energy was determined by reducing ilmenite particles ranging from 60 to 400 mesh with H₂ and CO partial pressures between .131 and .156 atm over a temperature range of 812 to 1173°C. The activation energy for hydrogen reduction was found to be 22.3 kcal/mol and the activation energy for carbon monoxide reduction was found to be 16.1 kcal/mol.
Degree ProgramGraduate College