Digitale Medien
s.l. ; Stafa-Zurich, Switzerland
Materials science forum
Vol. 555 (Sept. 2007), p. 273-278
ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
The investigated nanometric magnetite powders were synthesized electrochemically, andexamined by XRD and SEM techniques. Their reduction was conducted through the isothermalheating in hydrogen in the temperature range from 600 to 860 K. Kinetics of the hydrogen recoveryprocess during oxidation of freshly formed Fe powders in a water vapor stream was also studied. Itwas assumed that the solid-gas reaction is diffusion controlled, and Jander’s model was applied todescribe it. The experimental data suggest that the reoxidation process proceeds in two stages, atvarious activation energies. By changing the conditions of the electrochemical (EC) process wewere able to produce the iron oxide powders with optimal particle size and activity, for purehydrogen production through appropriate reduction/oxidation processes
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.555.273.pdf
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