<p> The kinetics of the hematite to rnagnetite reduction have been
studied in H2-H2O, and H2-H2O-N2 gas mixtures, using natural as well
as synthetic specimens. The reactivity of hematite was found to be
related to the structural defects formed during the preparation of the
specimens. The type of defects formed and their effect on reactivity
are discussed. Kinetic studies are performed on the specimens with
reproducible properties. Rate expressions based upon suitable reaction
mechanisms are derived and their validity checked with the experimental
data. Reaction rate parameters for the expressions accurately interpreting
the experimental results are evaluated, and the effect of nitrogen is
separately established. Values of enthalpies and entropies for the
mechanistic steps a.re calculated from the temperature dependence of these
parameters, which reasonably support the proposed mechanism. </p> / Thesis / Doctor of Philosophy (PhD)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/19866 |
| Date | 11 1900 |
| Creators | Nabi, Ghulam |
| Contributors | Lu, W. K., Metallurgy |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
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