Reduction of Nanometric Magnetite Powder |
| Journal |
Materials Science Forum (Volume 555) |
| Volume |
Research Trends in Contemporary Materials Science |
| Edited by |
Dragan P. Uskoković, Slobodan K. Milonjić and Dejan I. Raković |
| Pages |
273-278 |
| DOI |
10.4028/www.scientific.net/MSF.555.273 |
| Online since |
September, 2007 |
| Authors |
Lj. Vulićević,
N. Ivanović,
N. Popović,
V. Kusigerski,
Milesa Srećković,
Ž. Tomić,
S. Vardić
|
| Keywords |
Electrochemical Process, Hydrogenization, Nanometric Magnetite, Reduction, Reoxidation |
| Abstract |
The investigated nanometric magnetite powders were synthesized electrochemically, and
examined by XRD and SEM techniques. Their reduction was conducted through the isothermal
heating in hydrogen in the temperature range from 600 to 860 K. Kinetics of the hydrogen recovery
process during oxidation of freshly formed Fe powders in a water vapor stream was also studied. It
was assumed that the solid-gas reaction is diffusion controlled, and Jander’s model was applied to
describe it. The experimental data suggest that the reoxidation process proceeds in two stages, at
various activation energies. By changing the conditions of the electrochemical (EC) process we
were able to produce the iron oxide powders with optimal particle size and activity, for pure
hydrogen production through appropriate reduction/oxidation processes. |
| Full Paper |
Get the full paper by clicking here
|
| Preview |
Free first page example |
