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...

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Autores principales:	Li Pengfei, Zhang Jian, Luo Biwei, Li Yan, Ji Jun, He Dongsheng, Tian Qifeng, Chen Yichang
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	phosphate rock particle size carbothermal reduction apparent kinetics model non-isothermal thermogravimetric analyses apparent activation energy Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/03c6f962ce954856a3dba2158d606acf
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spelling	oai:doaj.org-article:03c6f962ce954856a3dba2158d606acf2021-12-05T14:10:46ZKinetics of Carbothermal Reduction Process of Different Size Phosphate Rocks2391-543910.1515/eng-2021-0025https://doaj.org/article/03c6f962ce954856a3dba2158d606acf2021-01-01T00:00:00Zhttps://doi.org/10.1515/eng-2021-0025https://doaj.org/toc/2391-5439The 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).Li PengfeiZhang JianLuo BiweiLi YanJi JunHe DongshengTian QifengChen YichangDe Gruyterarticlephosphate rockparticle sizecarbothermal reductionapparent kinetics modelnon-isothermal thermogravimetric analysesapparent activation energyEngineering (General). Civil engineering (General)TA1-2040ENOpen Engineering, Vol 11, Iss 1, Pp 281-293 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	phosphate rock particle size carbothermal reduction apparent kinetics model non-isothermal thermogravimetric analyses apparent activation energy Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	phosphate rock particle size carbothermal reduction apparent kinetics model non-isothermal thermogravimetric analyses apparent activation energy Engineering (General). Civil engineering (General) TA1-2040 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
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).
format	article
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
title	Kinetics of Carbothermal Reduction Process of Different Size Phosphate Rocks
title_short	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_sort	kinetics of carbothermal reduction process of different size phosphate rocks
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/03c6f962ce954856a3dba2158d606acf
work_keys_str_mv	AT lipengfei kineticsofcarbothermalreductionprocessofdifferentsizephosphaterocks AT zhangjian kineticsofcarbothermalreductionprocessofdifferentsizephosphaterocks AT luobiwei kineticsofcarbothermalreductionprocessofdifferentsizephosphaterocks AT liyan kineticsofcarbothermalreductionprocessofdifferentsizephosphaterocks AT jijun kineticsofcarbothermalreductionprocessofdifferentsizephosphaterocks AT hedongsheng kineticsofcarbothermalreductionprocessofdifferentsizephosphaterocks AT tianqifeng kineticsofcarbothermalreductionprocessofdifferentsizephosphaterocks AT chenyichang kineticsofcarbothermalreductionprocessofdifferentsizephosphaterocks
_version_	1718371699946160128

Kinetics of Carbothermal Reduction Process of Different Size Phosphate Rocks

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