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Faculty of Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
CATALYTIC EFFECTS OF DOPANT METAL-OXIDES ON THE REDUCTION OF HEMATITE BY CARBON IN THE GRAPHITE-IRON (III) OXIDE SYSTEM
CATALYTIC EFFECTS OF DOPANT METAL-OXIDES ON THE REDUCTION OF HEMATITE BY CARBON IN THE GRAPHITE-IRON (III) OXIDE SYSTEM
Document Language
:
Arabic
Abstract
:
The effects of doping of hematite with Li+ or Cu2+ ions on the reduction of hematite to iron in the graphite-iron (III) oxide system in air have been investigated using isothermal and dynamic TG techniques. Kinetic analysis of dynamic and isothermal data using different theoretical models have been performed. A comparison of the results for the doped and non-doped samples shows that doping does not change the model for reaction interface, but it remarkably affects the kinetics of the reaction. The isothermal results show that doping with Li2O decreases both E and ln A values, while doping with CuO does not affect E, but increases ln A. A significant decrease occurs in the time for half-completion of reaction, especially at the lower temperatures and in the case of doping with CuO. Doping experiments support the two-stage oxygen transfer mechanism for the reduction of iron oxide with carbon.
Journal Name
:
INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY
Volume
:
30
Issue Number
:
1
Publishing Year
:
1991 AH
Added Date
:
Saturday, June 14, 2008
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
سليمان ناصر باسهل
BASAHEL SN
Researcher
.
HUSSIENY E
Researcher
.
DIEFALLAH M
Researcher
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