The effect of particle size on the reduction of ilmenite
Issue Date
1994Keywords
Engineering, Chemical.Advisor
Shadman, FarhangMetadata
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The University of Arizona.Rights
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.Abstract
The 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.Type
textThesis-Reproduction (electronic)
Degree Name
M.S.Degree Level
mastersDegree Program
Graduate CollegeChemical Engineering