Dolomite thermal behaviour: A proposal to establish a definitive decomposition mechanism in a convective air atmosphere
In this research, the thermal behaviour of two dolostone samples of Argentine origin has been studied. First, a physicochemical characterization of the raw materials was carried out, determining their chemical and mineralogical composition. The thermal response of the materials was evaluated using T...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Open Ceramics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666539523000779 |
| _version_ | 1797736201800646656 |
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| author | L.C. Resio |
| author_facet | L.C. Resio |
| author_sort | L.C. Resio |
| collection | DOAJ |
| description | In this research, the thermal behaviour of two dolostone samples of Argentine origin has been studied. First, a physicochemical characterization of the raw materials was carried out, determining their chemical and mineralogical composition. The thermal response of the materials was evaluated using TGA, DTA, muffle calcination, XRD and FTIR techniques. The thermal tests consisted of calcination schedules at temperatures and times of 750 °C in 1 and 3 h and 950 °C in 1, 3 and 4 h. With all these tests, the mechanism of thermal decomposition was established, taking as principle that a reaction mechanism must be coincident with all the experimental data. The results of the experiments indicate a three-stage reaction mechanism, the first stage being a high entropy process that, according to free energy calculations, this mechanism is more satisfactory than the current decomposition mechanism in calcium and magnesium carbonates separately. |
| first_indexed | 2024-03-12T13:10:14Z |
| format | Article |
| id | doaj.art-5f90bde5dfa2453ab38497331e7b7066 |
| institution | Directory Open Access Journal |
| issn | 2666-5395 |
| language | English |
| last_indexed | 2024-03-12T13:10:14Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Open Ceramics |
| spelling | doaj.art-5f90bde5dfa2453ab38497331e7b70662023-08-28T04:23:20ZengElsevierOpen Ceramics2666-53952023-09-0115100405Dolomite thermal behaviour: A proposal to establish a definitive decomposition mechanism in a convective air atmosphereL.C. Resio0Instituto de Ciencia y Tecnología de Materiales (INTEMA), Universidad Nacional de Mar Del Plata, CONICET, Av.Colón 10850, B7608FDQ Mar Del Plata, ArgentinaIn this research, the thermal behaviour of two dolostone samples of Argentine origin has been studied. First, a physicochemical characterization of the raw materials was carried out, determining their chemical and mineralogical composition. The thermal response of the materials was evaluated using TGA, DTA, muffle calcination, XRD and FTIR techniques. The thermal tests consisted of calcination schedules at temperatures and times of 750 °C in 1 and 3 h and 950 °C in 1, 3 and 4 h. With all these tests, the mechanism of thermal decomposition was established, taking as principle that a reaction mechanism must be coincident with all the experimental data. The results of the experiments indicate a three-stage reaction mechanism, the first stage being a high entropy process that, according to free energy calculations, this mechanism is more satisfactory than the current decomposition mechanism in calcium and magnesium carbonates separately.http://www.sciencedirect.com/science/article/pii/S2666539523000779Thermal behaviourDolomiteDolostoneThermal decompositionReaction mechanismEntropy |
| spellingShingle | L.C. Resio Dolomite thermal behaviour: A proposal to establish a definitive decomposition mechanism in a convective air atmosphere Open Ceramics Thermal behaviour Dolomite Dolostone Thermal decomposition Reaction mechanism Entropy |
| title | Dolomite thermal behaviour: A proposal to establish a definitive decomposition mechanism in a convective air atmosphere |
| title_full | Dolomite thermal behaviour: A proposal to establish a definitive decomposition mechanism in a convective air atmosphere |
| title_fullStr | Dolomite thermal behaviour: A proposal to establish a definitive decomposition mechanism in a convective air atmosphere |
| title_full_unstemmed | Dolomite thermal behaviour: A proposal to establish a definitive decomposition mechanism in a convective air atmosphere |
| title_short | Dolomite thermal behaviour: A proposal to establish a definitive decomposition mechanism in a convective air atmosphere |
| title_sort | dolomite thermal behaviour a proposal to establish a definitive decomposition mechanism in a convective air atmosphere |
| topic | Thermal behaviour Dolomite Dolostone Thermal decomposition Reaction mechanism Entropy |
| url | http://www.sciencedirect.com/science/article/pii/S2666539523000779 |
| work_keys_str_mv | AT lcresio dolomitethermalbehaviouraproposaltoestablishadefinitivedecompositionmechanisminaconvectiveairatmosphere |