Thermal dehydration kinetics of phosphogypsum
Phsophogypsum is a by-product from the processing phosphate rock. Before the use of it in cement industry such as setting regulator is necessary a study of dehydration reaction of phosphogypsum to avoid the false setting during the milling. The aim is to study the thermal behavior of two different...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2015-09-01
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| Series: | Materiales de Construccion |
| Subjects: | |
| Online Access: | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1847 |
| _version_ | 1819296770953314304 |
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| author | F. A. López H. Tayibi I. García-Díaz F. J. Alguacil |
| author_facet | F. A. López H. Tayibi I. García-Díaz F. J. Alguacil |
| author_sort | F. A. López |
| collection | DOAJ |
| description | Phsophogypsum is a by-product from the processing phosphate rock. Before the use of it in cement industry such as setting regulator is necessary a study of dehydration reaction of phosphogypsum to avoid the false setting during the milling.
The aim is to study the thermal behavior of two different phosphogypsum sources (Spain and Tunisia) under non-isothermal conditions in argon atmosphere by using Thermo-Gravimetriy, Differential Thermal Analysis (TG-DTA) and Differential Scanning Calorimetry (DSC).
DSC experiments were carried out at temperatures ranging from ambient to 350 °C at different heating rates. The temperatures of conversion from gypsum to hemihydrate and anhydrite states and heat of dehydration were determined. Various methods were used to analyze the DSC data for reaction kinetics determination. The activation energy and frequency factor were calculated for dehydration of phosphogypsum. Activation energy values of the main dehydration reaction of phosphogypsum were calculated to be approximately 61–118 kJ/mol. |
| first_indexed | 2024-12-24T05:03:24Z |
| format | Article |
| id | doaj.art-98877a8162e744548c1a7df9b8b028d8 |
| institution | Directory Open Access Journal |
| issn | 0465-2746 1988-3226 |
| language | English |
| last_indexed | 2024-12-24T05:03:24Z |
| publishDate | 2015-09-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Materiales de Construccion |
| spelling | doaj.art-98877a8162e744548c1a7df9b8b028d82022-12-21T17:13:54ZengConsejo Superior de Investigaciones CientíficasMateriales de Construccion0465-27461988-32262015-09-0165319e061e06110.3989/mc.2015.072141786Thermal dehydration kinetics of phosphogypsumF. A. López0H. Tayibi1I. García-Díaz2F. J. Alguacil3Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC)Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC)Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC)Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC)Phsophogypsum is a by-product from the processing phosphate rock. Before the use of it in cement industry such as setting regulator is necessary a study of dehydration reaction of phosphogypsum to avoid the false setting during the milling. The aim is to study the thermal behavior of two different phosphogypsum sources (Spain and Tunisia) under non-isothermal conditions in argon atmosphere by using Thermo-Gravimetriy, Differential Thermal Analysis (TG-DTA) and Differential Scanning Calorimetry (DSC). DSC experiments were carried out at temperatures ranging from ambient to 350 °C at different heating rates. The temperatures of conversion from gypsum to hemihydrate and anhydrite states and heat of dehydration were determined. Various methods were used to analyze the DSC data for reaction kinetics determination. The activation energy and frequency factor were calculated for dehydration of phosphogypsum. Activation energy values of the main dehydration reaction of phosphogypsum were calculated to be approximately 61–118 kJ/mol.http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1847phosphogypsumkineticsdehydrationthermal behaviorcement |
| spellingShingle | F. A. López H. Tayibi I. García-Díaz F. J. Alguacil Thermal dehydration kinetics of phosphogypsum Materiales de Construccion phosphogypsum kinetics dehydration thermal behavior cement |
| title | Thermal dehydration kinetics of phosphogypsum |
| title_full | Thermal dehydration kinetics of phosphogypsum |
| title_fullStr | Thermal dehydration kinetics of phosphogypsum |
| title_full_unstemmed | Thermal dehydration kinetics of phosphogypsum |
| title_short | Thermal dehydration kinetics of phosphogypsum |
| title_sort | thermal dehydration kinetics of phosphogypsum |
| topic | phosphogypsum kinetics dehydration thermal behavior cement |
| url | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1847 |
| work_keys_str_mv | AT falopez thermaldehydrationkineticsofphosphogypsum AT htayibi thermaldehydrationkineticsofphosphogypsum AT igarciadiaz thermaldehydrationkineticsofphosphogypsum AT fjalguacil thermaldehydrationkineticsofphosphogypsum |