Silicothermic reduction of MgO using diode laser: Experimental and kinetic study
As a step toward realizing magnesium civilization, which needs a sustainable Mg production process, the reduction of MgO to Mg has been investigated. Direct diode laser (DDL) produces high power and continuous beam in tiny spots. The laser with energy density up to 83*105 W/cm2 is focused on MgO/Si...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2017-12-01
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| Series: | Journal of Magnesium and Alloys |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956717300610 |
| _version_ | 1827279170041806848 |
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| author | M.S. Mahmoud T. Yabe |
| author_facet | M.S. Mahmoud T. Yabe |
| author_sort | M.S. Mahmoud |
| collection | DOAJ |
| description | As a step toward realizing magnesium civilization, which needs a sustainable Mg production process, the reduction of MgO to Mg has been investigated. Direct diode laser (DDL) produces high power and continuous beam in tiny spots. The laser with energy density up to 83*105 W/cm2 is focused on MgO/Si target inside the vacuum chamber, creating the high temperature zone, which stimulates the Mg production reaction. The vapor is collected on the copper plate; and then, analyzed chemically in terms of Mg production efficiency. The largest reduction and energy efficiencies in Ar atmosphere were 41% and 15.3 mg kJ−1, while in the vacuum, 13.5% and 15.8 mg kJ−1 were attainable. The reactions of MgO and Si have been investigated. Calculations revealed that the MgO reduction with Si proceeds as heterogeneous reaction. The rate of reaction of Si with MgO is faster than the rate of MgO evaporation and Mg vapor deposition. Keywords: Diode laser, Magnesium oxide, Magnesium, Reduction, Silicon |
| first_indexed | 2024-04-24T08:14:39Z |
| format | Article |
| id | doaj.art-1933f6b1135149c4bb1a1d7a64f61c8b |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-04-24T08:14:39Z |
| publishDate | 2017-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-1933f6b1135149c4bb1a1d7a64f61c8b2024-04-17T04:16:15ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672017-12-0154430438Silicothermic reduction of MgO using diode laser: Experimental and kinetic studyM.S. Mahmoud0T. Yabe1Chemical Engineering Department, Faculty of Engineering, Minia University, Minia, 61516, Egypt; Engineering Department, Collage of Applied Science, Suhar, 311, Oman; Corresponding author. Chemical Engineering Department, Faculty of engineering, Minia University, Minia, 61516, Egypt.Mechanical Engineering Department, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8552, Japan; Energy Genesis Cycle, 405 East Wing, 3-2-1 Sakado, Takatsuku, Kawasaki City, Kanagawa 213-0012, JapanAs a step toward realizing magnesium civilization, which needs a sustainable Mg production process, the reduction of MgO to Mg has been investigated. Direct diode laser (DDL) produces high power and continuous beam in tiny spots. The laser with energy density up to 83*105 W/cm2 is focused on MgO/Si target inside the vacuum chamber, creating the high temperature zone, which stimulates the Mg production reaction. The vapor is collected on the copper plate; and then, analyzed chemically in terms of Mg production efficiency. The largest reduction and energy efficiencies in Ar atmosphere were 41% and 15.3 mg kJ−1, while in the vacuum, 13.5% and 15.8 mg kJ−1 were attainable. The reactions of MgO and Si have been investigated. Calculations revealed that the MgO reduction with Si proceeds as heterogeneous reaction. The rate of reaction of Si with MgO is faster than the rate of MgO evaporation and Mg vapor deposition. Keywords: Diode laser, Magnesium oxide, Magnesium, Reduction, Siliconhttp://www.sciencedirect.com/science/article/pii/S2213956717300610 |
| spellingShingle | M.S. Mahmoud T. Yabe Silicothermic reduction of MgO using diode laser: Experimental and kinetic study Journal of Magnesium and Alloys |
| title | Silicothermic reduction of MgO using diode laser: Experimental and kinetic study |
| title_full | Silicothermic reduction of MgO using diode laser: Experimental and kinetic study |
| title_fullStr | Silicothermic reduction of MgO using diode laser: Experimental and kinetic study |
| title_full_unstemmed | Silicothermic reduction of MgO using diode laser: Experimental and kinetic study |
| title_short | Silicothermic reduction of MgO using diode laser: Experimental and kinetic study |
| title_sort | silicothermic reduction of mgo using diode laser experimental and kinetic study |
| url | http://www.sciencedirect.com/science/article/pii/S2213956717300610 |
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