ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract XRD and TG reduction analysis show that γ-Fe2O3 Fe-Cr catalysts, which contains 0.0 to 14.0 wt %. Cr2O3 and prepared by coprecipitating method, consist of crystalline γ-Fe2O3 and non-crystalline Fe2O3. Between 150–450 °C, three reduction stages are observed in the catalyst. The first stage is non-crystalline Fe2O3 reduced to non-crystalline Fe3O4, the second is crystalline γ-Fe2O3 to crystalline Fe3O4 and the third is non-crystalline Fe2O3 reduced to non-crystalline FeO. About 5 wt %. Cr2O3 can enter the lattices of γ-Fe2O3 to form solid solution. With the increasing of Cr2O3 content, the relative abundance of non-crystalline Fe2O3 and the amount of soluble Cr2O3 in non-crystalline increases, while the crystalline size of γ-Fe2O3 decreases.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1004682231688
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