Reduction of iron oxide catalysts: The investigation of kinetic parameters using rate perturbation and linear heating thermoanalytical techniques

Article Abstract:

The mechanism and kinetics of the reduction of powdered Fe2O3 and Fe3O4 samples are studied under nonisothermal conditions. Conventional linear heating temperature-programmed reduction (TPR) and constant rate temperature-programmed reduction (CR-TPR) techniques are used to describe the mechanism of reduction step of Fe2O3 to Fe3O4 through a model involving the random formation and growth of nuclei.

Methods, Oxidation-reduction reaction, Oxidation reduction reactions, Ferric oxide, Thermal properties

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Dehydroxylation and silanization of the surfaces of beta-cristobalite silica: an ab initio simulation

Article Abstract:

Dehydroxylation and silanization reactions on the hydroxylated (100) and (111) surfaces of beta-cristobalite as two possible models of the amorphous silica surface is studied. The results concluded that the geminal silanols on the (100) surface are H-bonded to vicinal silanols.

Structure, Chemical properties, Cristobalite

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