Thermodynamics and Kinetics Analysis on Carbothermic Reduction of Calcined Magnesite in Vacuum
The carbothermic reduction of calcined magnesite in vacuum was studied. By thermodynamic analysis, the starting temperature of reduction reaction dropped from 2173K to 1523K when system pressure dropped from 1 atmosphere to 100 Pa. The experiments were carried out at different conditions under 10~10...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Polish Academy of Sciences
2022-08-01
|
| Series: | Archives of Metallurgy and Materials |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/124052/PDF/AMM-2022-3-27-Tang.pdf |
| _version_ | 1818473161118711808 |
|---|---|
| author | Qifeng Tang Jinqing Ao Biyou Peng Biao Guo Tao Yang |
| author_facet | Qifeng Tang Jinqing Ao Biyou Peng Biao Guo Tao Yang |
| author_sort | Qifeng Tang |
| collection | DOAJ |
| description | The carbothermic reduction of calcined magnesite in vacuum was studied. By thermodynamic analysis, the starting temperature of reduction reaction dropped from 2173K to 1523K when system pressure dropped from 1 atmosphere to 100 Pa. The experiments were carried out at different conditions under 10~100 Pa and the experimental results shown that the reduction extent of MgO improved by increasing the reaction temperature and time, the pellet forming pressure as well as adding fluoride as catalyst. The rate-determining step of carbothermic reduction process was gas diffusion with the apparent activation energy of 241.19~278.56 kJ/mol. |
| first_indexed | 2024-04-14T04:19:28Z |
| format | Article |
| id | doaj.art-2ee6a37f9619481c99ebe6fdfb4f80e0 |
| institution | Directory Open Access Journal |
| issn | 2300-1909 |
| language | English |
| last_indexed | 2024-04-14T04:19:28Z |
| publishDate | 2022-08-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Metallurgy and Materials |
| spelling | doaj.art-2ee6a37f9619481c99ebe6fdfb4f80e02022-12-22T02:12:34ZengPolish Academy of SciencesArchives of Metallurgy and Materials2300-19092022-08-01vol. 67No 310211026https://doi.org/10.24425/amm.2022.139696Thermodynamics and Kinetics Analysis on Carbothermic Reduction of Calcined Magnesite in VacuumQifeng Tang0https://orcid.org/0000-0002-2845-3816Jinqing Ao1https://orcid.org/0000-0002-2229-8640Biyou Peng2https://orcid.org/0000-0002-7018-2642Biao Guo3https://orcid.org/0000-0002-2261-2054Tao Yang4https://orcid.org/0000-0002-1277-2708Xihua University, College of Materials Science and Engineering, Chengdu 610039, PR ChinaXihua University, College of Materials Science and Engineering, Chengdu 610039, PR ChinaXihua University, College of Materials Science and Engineering, Chengdu 610039, PR ChinaXihua University, College of Materials Science and Engineering, Chengdu 610039, PR ChinaXihua University, College of Materials Science and Engineering, Chengdu 610039, PR ChinaThe carbothermic reduction of calcined magnesite in vacuum was studied. By thermodynamic analysis, the starting temperature of reduction reaction dropped from 2173K to 1523K when system pressure dropped from 1 atmosphere to 100 Pa. The experiments were carried out at different conditions under 10~100 Pa and the experimental results shown that the reduction extent of MgO improved by increasing the reaction temperature and time, the pellet forming pressure as well as adding fluoride as catalyst. The rate-determining step of carbothermic reduction process was gas diffusion with the apparent activation energy of 241.19~278.56 kJ/mol.https://journals.pan.pl/Content/124052/PDF/AMM-2022-3-27-Tang.pdfcalcined magnesitecarbothermic reductionvacuumthermodynamickinetic |
| spellingShingle | Qifeng Tang Jinqing Ao Biyou Peng Biao Guo Tao Yang Thermodynamics and Kinetics Analysis on Carbothermic Reduction of Calcined Magnesite in Vacuum Archives of Metallurgy and Materials calcined magnesite carbothermic reduction vacuum thermodynamic kinetic |
| title | Thermodynamics and Kinetics Analysis on Carbothermic Reduction of Calcined Magnesite in Vacuum |
| title_full | Thermodynamics and Kinetics Analysis on Carbothermic Reduction of Calcined Magnesite in Vacuum |
| title_fullStr | Thermodynamics and Kinetics Analysis on Carbothermic Reduction of Calcined Magnesite in Vacuum |
| title_full_unstemmed | Thermodynamics and Kinetics Analysis on Carbothermic Reduction of Calcined Magnesite in Vacuum |
| title_short | Thermodynamics and Kinetics Analysis on Carbothermic Reduction of Calcined Magnesite in Vacuum |
| title_sort | thermodynamics and kinetics analysis on carbothermic reduction of calcined magnesite in vacuum |
| topic | calcined magnesite carbothermic reduction vacuum thermodynamic kinetic |
| url | https://journals.pan.pl/Content/124052/PDF/AMM-2022-3-27-Tang.pdf |
| work_keys_str_mv | AT qifengtang thermodynamicsandkineticsanalysisoncarbothermicreductionofcalcinedmagnesiteinvacuum AT jinqingao thermodynamicsandkineticsanalysisoncarbothermicreductionofcalcinedmagnesiteinvacuum AT biyoupeng thermodynamicsandkineticsanalysisoncarbothermicreductionofcalcinedmagnesiteinvacuum AT biaoguo thermodynamicsandkineticsanalysisoncarbothermicreductionofcalcinedmagnesiteinvacuum AT taoyang thermodynamicsandkineticsanalysisoncarbothermicreductionofcalcinedmagnesiteinvacuum |