Kinetics of Carbothermal Reduction Process of Different Size Phosphate Rocks
The effects of particle size on the apparent kinetics of carbothermal reduction process of phosphate rock were studied by non-isothermal thermogravimetric analyses. Phosphate rock of various particle size was reacted with coke and silica under high purity argon atmosphere. The apparent kinetic model...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2021-01-01
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| Series: | Open Engineering |
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| Online Access: | https://doi.org/10.1515/eng-2021-0025 |
| _version_ | 1818307185634967552 |
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| author | Li Pengfei Zhang Jian Luo Biwei Li Yan Ji Jun He Dongsheng Tian Qifeng Chen Yichang |
| author_facet | Li Pengfei Zhang Jian Luo Biwei Li Yan Ji Jun He Dongsheng Tian Qifeng Chen Yichang |
| author_sort | Li Pengfei |
| collection | DOAJ |
| description | The effects of particle size on the apparent kinetics of carbothermal reduction process of phosphate rock were studied by non-isothermal thermogravimetric analyses. Phosphate rock of various particle size was reacted with coke and silica under high purity argon atmosphere. The apparent kinetic model and parameters of carbothermal reduction reaction of phosphate rock with different particle sizes were derived by combination of model-free (Flynn–Wall–Ozawa, Kissinger–Akahira–Sunose, Tang, Starink) and model-fitting (Coats-Redfern, Master-plots) methods. The results showed that the obtained apparent activation energy of reaction reduces from 371.74 kJ/mol to 321.11 kJ/mol as the particle size of phosphate rock decreasing from 100–150 μm to 38–48 μm. The reaction apparent kinetics was found to follow shrinking-core model and the conversion degree function equation is
G(α)=1−(1−α)12G\left( \alpha \right) = 1 - {\left( {1 - \alpha } \right)^{{1 \over 2}}}
(α is conversion degree and G(α) is integral form of conversion degree function). |
| first_indexed | 2024-12-13T06:54:22Z |
| format | Article |
| id | doaj.art-03c6f962ce954856a3dba2158d606acf |
| institution | Directory Open Access Journal |
| issn | 2391-5439 |
| language | English |
| last_indexed | 2024-12-13T06:54:22Z |
| publishDate | 2021-01-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Engineering |
| spelling | doaj.art-03c6f962ce954856a3dba2158d606acf2022-12-21T23:56:04ZengDe GruyterOpen Engineering2391-54392021-01-0111128129310.1515/eng-2021-0025eng-2021-0025Kinetics of Carbothermal Reduction Process of Different Size Phosphate RocksLi Pengfei0Zhang Jian1Luo Biwei2Li Yan3Ji Jun4He Dongsheng5Tian Qifeng6Chen Yichang7School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan430205, ChinaDalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian116023, ChinaSchool of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan430205, ChinaSchool of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan430205, ChinaSchool of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan430205, China; Key Laboratory of Green Chemical Process of Ministry of Education & Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, Wuhan Institute of Technology, Wuhan430205, ChinaXingfa School of Mining Engineering, Wuhan Institute of Technology, Wuhan430074, China; National Engineering Research Centre of Phosphate Resource Development and Utilization & Engineering Research Centre of Phosphate Resource Development and Utilization, Ministry of Education, Wuhan430074, ChinaSchool of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan430205, China; Key Laboratory of Green Chemical Process of Ministry of Education & Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, Wuhan Institute of Technology, Wuhan430205, China; National Engineering Research Centre of Phosphate Resource Development and Utilization & Engineering Research Centre of Phosphate Resource Development and Utilization, Ministry of Education, Wuhan430074, ChinaHubei Research and Design Institute of Chemical Industry, Wuhan430074, ChinaThe effects of particle size on the apparent kinetics of carbothermal reduction process of phosphate rock were studied by non-isothermal thermogravimetric analyses. Phosphate rock of various particle size was reacted with coke and silica under high purity argon atmosphere. The apparent kinetic model and parameters of carbothermal reduction reaction of phosphate rock with different particle sizes were derived by combination of model-free (Flynn–Wall–Ozawa, Kissinger–Akahira–Sunose, Tang, Starink) and model-fitting (Coats-Redfern, Master-plots) methods. The results showed that the obtained apparent activation energy of reaction reduces from 371.74 kJ/mol to 321.11 kJ/mol as the particle size of phosphate rock decreasing from 100–150 μm to 38–48 μm. The reaction apparent kinetics was found to follow shrinking-core model and the conversion degree function equation is G(α)=1−(1−α)12G\left( \alpha \right) = 1 - {\left( {1 - \alpha } \right)^{{1 \over 2}}} (α is conversion degree and G(α) is integral form of conversion degree function).https://doi.org/10.1515/eng-2021-0025phosphate rockparticle sizecarbothermal reductionapparent kinetics modelnon-isothermal thermogravimetric analysesapparent activation energy |
| spellingShingle | Li Pengfei Zhang Jian Luo Biwei Li Yan Ji Jun He Dongsheng Tian Qifeng Chen Yichang Kinetics of Carbothermal Reduction Process of Different Size Phosphate Rocks Open Engineering phosphate rock particle size carbothermal reduction apparent kinetics model non-isothermal thermogravimetric analyses apparent activation energy |
| title | Kinetics of Carbothermal Reduction Process of Different Size Phosphate Rocks |
| title_full | Kinetics of Carbothermal Reduction Process of Different Size Phosphate Rocks |
| title_fullStr | Kinetics of Carbothermal Reduction Process of Different Size Phosphate Rocks |
| title_full_unstemmed | Kinetics of Carbothermal Reduction Process of Different Size Phosphate Rocks |
| title_short | Kinetics of Carbothermal Reduction Process of Different Size Phosphate Rocks |
| title_sort | kinetics of carbothermal reduction process of different size phosphate rocks |
| topic | phosphate rock particle size carbothermal reduction apparent kinetics model non-isothermal thermogravimetric analyses apparent activation energy |
| url | https://doi.org/10.1515/eng-2021-0025 |
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