Carbothermic reduction of mechanically activated NiO-carbon mixture: Non-isothermal kinetics
The effect of mechanical activation on the carbothermic reduction of nickel oxide was investigated. Mixtures of nickel oxide and activated carbon (99% carbon) were milled for different periods of time in a planetary ball mill. The unmilled mixture and milled samples were subjected to thermogravimetr...
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University of Belgrade, Technical Faculty, Bor
2018-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2018/1450-53391800022B.pdf |
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| author | Bakhshandeh S. Setoudeh N. Ali Askari Zamani M. Mohassel A. |
| author_facet | Bakhshandeh S. Setoudeh N. Ali Askari Zamani M. Mohassel A. |
| author_sort | Bakhshandeh S. |
| collection | DOAJ |
| description | The effect of mechanical activation on the carbothermic reduction of nickel oxide was investigated. Mixtures of nickel oxide and activated carbon (99% carbon) were milled for different periods of time in a planetary ball mill. The unmilled mixture and milled samples were subjected to thermogravimetric analysis (TGA) under an argon atmosphere and their solid products of the reduction reaction were studied using XRD experiments. TGA showed that the reduction of NiO started at ~800℃ and ~720℃ in un-milled and one-hour milled samples respectively whilst after 25h of milling it decreased to about 430℃. The kinetics parameters of carbothermic reduction were determined using non-isothermal method (Coats-Redfern Method) for un-milled and milled samples. The activation energy was determined to be about 222 kJ mol-1for un-milled mixture whilst it was decreased to about 148 kJ mol-1 in 25-h milled sample. The decrease in the particle size/crystallite size of the milled samples resulted in a significant drop in the reaction temperature. |
| format | Article |
| id | doaj-art-7386f954fe104270b812a8e3908f3b18 |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-7386f954fe104270b812a8e3908f3b182025-02-02T22:01:26ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752018-01-0154331332210.2298/JMMB180323022B1450-53391800022BCarbothermic reduction of mechanically activated NiO-carbon mixture: Non-isothermal kineticsBakhshandeh S.0Setoudeh N.1Ali Askari Zamani M.2Mohassel A.3Yasouj University, Materials Engineering Department, Yasouj, IranYasouj University, Materials Engineering Department, Yasouj, IranYasouj University, Materials Engineering Department, Yasouj, IranYasouj University, Materials Engineering Department, Yasouj, IranThe effect of mechanical activation on the carbothermic reduction of nickel oxide was investigated. Mixtures of nickel oxide and activated carbon (99% carbon) were milled for different periods of time in a planetary ball mill. The unmilled mixture and milled samples were subjected to thermogravimetric analysis (TGA) under an argon atmosphere and their solid products of the reduction reaction were studied using XRD experiments. TGA showed that the reduction of NiO started at ~800℃ and ~720℃ in un-milled and one-hour milled samples respectively whilst after 25h of milling it decreased to about 430℃. The kinetics parameters of carbothermic reduction were determined using non-isothermal method (Coats-Redfern Method) for un-milled and milled samples. The activation energy was determined to be about 222 kJ mol-1for un-milled mixture whilst it was decreased to about 148 kJ mol-1 in 25-h milled sample. The decrease in the particle size/crystallite size of the milled samples resulted in a significant drop in the reaction temperature.http://www.doiserbia.nb.rs/img/doi/1450-5339/2018/1450-53391800022B.pdfball millingcarbothermic reductionnickel oxidenon-isothermal kineticsthermo-gravimetric analysis(TGA) |
| spellingShingle | Bakhshandeh S. Setoudeh N. Ali Askari Zamani M. Mohassel A. Carbothermic reduction of mechanically activated NiO-carbon mixture: Non-isothermal kinetics Journal of Mining and Metallurgy. Section B: Metallurgy ball milling carbothermic reduction nickel oxide non-isothermal kinetics thermo-gravimetric analysis(TGA) |
| title | Carbothermic reduction of mechanically activated NiO-carbon mixture: Non-isothermal kinetics |
| title_full | Carbothermic reduction of mechanically activated NiO-carbon mixture: Non-isothermal kinetics |
| title_fullStr | Carbothermic reduction of mechanically activated NiO-carbon mixture: Non-isothermal kinetics |
| title_full_unstemmed | Carbothermic reduction of mechanically activated NiO-carbon mixture: Non-isothermal kinetics |
| title_short | Carbothermic reduction of mechanically activated NiO-carbon mixture: Non-isothermal kinetics |
| title_sort | carbothermic reduction of mechanically activated nio carbon mixture non isothermal kinetics |
| topic | ball milling carbothermic reduction nickel oxide non-isothermal kinetics thermo-gravimetric analysis(TGA) |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2018/1450-53391800022B.pdf |
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