Carbonatation and Decarbonatation Kinetics in the La2O3-La2O2CO3 System under CO2 Gas Flows
The carbonatation of La2O3 oxide and the decarbonatation of lanthanum carbonate phase La2O2CO3 are investigated using thermal and thermogravimetry analyses under CO2 gas flow. The initial phase La2O3 is first elaborated from pyrolysis of a LaOHCO3 precursor. Then, thermal and thermogravimetry analys...
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| Format: | Article |
| Language: | English |
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Wiley
2010-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2010/360597 |
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| author | Bahcine Bakiz Frédéric Guinneton Madjid Arab Abdeljalil Benlhachemi Sylvie Villain Pierre Satre Jean-Raymond Gavarri |
| author_facet | Bahcine Bakiz Frédéric Guinneton Madjid Arab Abdeljalil Benlhachemi Sylvie Villain Pierre Satre Jean-Raymond Gavarri |
| author_sort | Bahcine Bakiz |
| collection | DOAJ |
| description | The carbonatation of La2O3 oxide and the decarbonatation of lanthanum carbonate phase La2O2CO3 are investigated using thermal and thermogravimetry analyses under CO2 gas flow. The initial phase La2O3 is first elaborated from pyrolysis of a LaOHCO3 precursor. Then, thermal and thermogravimetry analyses are carried out under CO2 flow, as temperature increases then decreases. The carbonatation kinetics of La2O3 is determined at three fixed temperatures. Electrical impedance spectroscopy is performed to determine the electrical responses associated with ionic mobilities and phase changes, in the temperature range 25 to 900∘C. The electrical conduction during heating under CO2 gas flow should be linked to two regimes of ionic conduction of the carbonate ions. From these electrical measurements, the ionic mobility of carbonate ions CO3 2− is found to be close to 0.003 ⋅10−4 cm2 s−1 V−1 at 750∘C for the monoclinic La2O2CO3 phase. |
| format | Article |
| id | doaj-art-3e85ea08ff8547ceb1b498078df63b96 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2010-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-3e85ea08ff8547ceb1b498078df63b962025-02-03T01:03:26ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422010-01-01201010.1155/2010/360597360597Carbonatation and Decarbonatation Kinetics in the La2O3-La2O2CO3 System under CO2 Gas FlowsBahcine Bakiz0Frédéric Guinneton1Madjid Arab2Abdeljalil Benlhachemi3Sylvie Villain4Pierre Satre5Jean-Raymond Gavarri6Institut Matériaux Microélectronique & Nanosciences de Provence, UMR CNRS 6242, Université du SUD Toulon-Var, BP 20132, 83957 La Garde Cedex, FranceInstitut Matériaux Microélectronique & Nanosciences de Provence, UMR CNRS 6242, Université du SUD Toulon-Var, BP 20132, 83957 La Garde Cedex, FranceInstitut Matériaux Microélectronique & Nanosciences de Provence, UMR CNRS 6242, Université du SUD Toulon-Var, BP 20132, 83957 La Garde Cedex, FranceLaboratoire Matériaux et Environnement, Faculté des Sciences, Université Ibn Zohr, BP 8106, 80000 Agadir, MoroccoInstitut Matériaux Microélectronique & Nanosciences de Provence, UMR CNRS 6242, Université du SUD Toulon-Var, BP 20132, 83957 La Garde Cedex, FranceInstitut Matériaux Microélectronique & Nanosciences de Provence, UMR CNRS 6242, Université du SUD Toulon-Var, BP 20132, 83957 La Garde Cedex, FranceInstitut Matériaux Microélectronique & Nanosciences de Provence, UMR CNRS 6242, Université du SUD Toulon-Var, BP 20132, 83957 La Garde Cedex, FranceThe carbonatation of La2O3 oxide and the decarbonatation of lanthanum carbonate phase La2O2CO3 are investigated using thermal and thermogravimetry analyses under CO2 gas flow. The initial phase La2O3 is first elaborated from pyrolysis of a LaOHCO3 precursor. Then, thermal and thermogravimetry analyses are carried out under CO2 flow, as temperature increases then decreases. The carbonatation kinetics of La2O3 is determined at three fixed temperatures. Electrical impedance spectroscopy is performed to determine the electrical responses associated with ionic mobilities and phase changes, in the temperature range 25 to 900∘C. The electrical conduction during heating under CO2 gas flow should be linked to two regimes of ionic conduction of the carbonate ions. From these electrical measurements, the ionic mobility of carbonate ions CO3 2− is found to be close to 0.003 ⋅10−4 cm2 s−1 V−1 at 750∘C for the monoclinic La2O2CO3 phase.http://dx.doi.org/10.1155/2010/360597 |
| spellingShingle | Bahcine Bakiz Frédéric Guinneton Madjid Arab Abdeljalil Benlhachemi Sylvie Villain Pierre Satre Jean-Raymond Gavarri Carbonatation and Decarbonatation Kinetics in the La2O3-La2O2CO3 System under CO2 Gas Flows Advances in Materials Science and Engineering |
| title | Carbonatation and Decarbonatation Kinetics in the La2O3-La2O2CO3 System under CO2 Gas Flows |
| title_full | Carbonatation and Decarbonatation Kinetics in the La2O3-La2O2CO3 System under CO2 Gas Flows |
| title_fullStr | Carbonatation and Decarbonatation Kinetics in the La2O3-La2O2CO3 System under CO2 Gas Flows |
| title_full_unstemmed | Carbonatation and Decarbonatation Kinetics in the La2O3-La2O2CO3 System under CO2 Gas Flows |
| title_short | Carbonatation and Decarbonatation Kinetics in the La2O3-La2O2CO3 System under CO2 Gas Flows |
| title_sort | carbonatation and decarbonatation kinetics in the la2o3 la2o2co3 system under co2 gas flows |
| url | http://dx.doi.org/10.1155/2010/360597 |
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