Thermal characterization and physico-chemical properties of Fe2O3-Mn2O3/Al2O3 systems

被引：8
|
作者：
Shaheen, WM [1 ]
Hong, KS
机构：
[1] Natl Res Ctr, Dept Phys Chem, Cairo, Egypt
[2] Korea Basic Sci Inst, Dept Phys, Seoul 136701, South Korea
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2002年 / 68卷 / 01期
关键词：
characterization; doping; solid-solid interaction; thermal decomposition;
D O I：
10.1023/A:1014929904259
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The effect of ferric and manganese oxides dopants on thermal and physicochemical properties of Mn-oxide/Al2O3 and Fe2O3/Al2O3 systems has been studied separately. The pure and doped mixed solids were thermally treated at 400-1000degreesC. Pyrolysis of pure and doped mixed solids was investigated via thermal analysis (TG-DTG) techniques. The thermal products were characterized using XRD-analysis. The results revealed that pure ferric nitrate decomposes into Fe2O3 at 350degreesC and shows thermal stability up to 1000degreesC. Crystalline Fe3O4 and Mn3O4 phases were detected for some doped solids precalcined at 1000degreesC. Crystalline gamma-Al2O3 phase was detected for all solids preheated up to 800degreesC. Ferric and manganese oxides enhanced the formation of alpha-Al2O3 phase at 1000degreesC. Crystalline MnAl2O4 and MnFe2O4 phases were formed at 1000degreesC as a result of solid-solid interaction processes. The catalytic behavior of the thermal products was tested using the decomposition of H2O2 reaction.
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页码：289 / 306
页数：18
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