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- Title
Effect of Microwave Irradiation to Kinetics of Carbothermic Reduction of NiO.
- Authors
Kazuhiro Nagata; Shin-ichiro Fukada
- Abstract
The carbothermic reduction of NiO was carried out by microwave irradiation at 2.45 GHz under a constant rate of temperature rise. The state of reaction was analyzed by means of non-equilibrium thermodynamics. The rates of the dominant reaction was the Boudouard reaction followed by NiO + CO-->Ni + CO2, differing from that by conventional radiant heating. The uncompensated heat of reactions and the enthalpy change of reactions were almost same amount. The activation energy was 141 kJ/mol for the carbothermic reduction of NiO, 115 kJ/mol for the NiO reduction by CO gas and 166 kJ/mol for the Boudouard reaction. The former two values were smaller than conventional radiant heating.
- Subjects
RADIANT heating; HEAT of reaction; MICROWAVES; ACTIVATION energy; IRRADIATION; THERMOCHEMISTRY
- Publication
Materials Transactions, 2023, Vol 64, Issue 4, p889
- ISSN
1345-9678
- Publication type
Article
- DOI
10.2320/matertrans.MT-M2022121