Thermal Decomposition of Hydrocalumite over a Temperature Range of 400–1500°C and Its Structure Reconstruction in Water
The thermal decomposition process and structure memory effect of hydrocalumite were investigated systematically for the first time over a wide temperature range of 400–1500°C. The calcined hydrocalumite samples and their rehydrated products were characterized by XRD, FT-IR, and SEM-EDX. The results...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2014-01-01
|
| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2014/454098 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832550261679194112 |
|---|---|
| author | Jiao Tian Qinghai Guo |
| author_facet | Jiao Tian Qinghai Guo |
| author_sort | Jiao Tian |
| collection | DOAJ |
| description | The thermal decomposition process and structure memory effect of hydrocalumite were investigated systematically for the first time over a wide temperature range of 400–1500°C. The calcined hydrocalumite samples and their rehydrated products were characterized by XRD, FT-IR, and SEM-EDX. The results show that the calcination products at temperatures ranging from 500 to 900°C are basically mayenite and lime, while one of the final products obtained by calcination at and above 1000°C is probably tricalcium aluminate (Ca3Al2O6). For the hydrocalumite samples calcined at temperatures below 1000°C, their lamellar structure can be completely recovered in deionized water at room temperature. However, the further increase of calcination temperature could impair the regeneration ability of hydrocalumite via contact with water. Upon calcination of hydrocalumite at 1000–1500°C followed by reaction with water, a stable compound tricalcium aluminate hexahydrate (Ca3Al2O6·6H2O) was produced, which is the reason why less hydrocalumite could be regenerated. |
| format | Article |
| id | doaj-art-200e1d855fb14242b13f2a1d808da44c |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-200e1d855fb14242b13f2a1d808da44c2025-02-03T06:07:07ZengWileyJournal of Chemistry2090-90632090-90712014-01-01201410.1155/2014/454098454098Thermal Decomposition of Hydrocalumite over a Temperature Range of 400–1500°C and Its Structure Reconstruction in WaterJiao Tian0Qinghai Guo1State Key Laboratory of Biogeology and Environmental Geology and School of Environmental Studies, China University of Geosciences, 388 Lumo Road, Wuhan, Hubei 430074, ChinaState Key Laboratory of Biogeology and Environmental Geology and School of Environmental Studies, China University of Geosciences, 388 Lumo Road, Wuhan, Hubei 430074, ChinaThe thermal decomposition process and structure memory effect of hydrocalumite were investigated systematically for the first time over a wide temperature range of 400–1500°C. The calcined hydrocalumite samples and their rehydrated products were characterized by XRD, FT-IR, and SEM-EDX. The results show that the calcination products at temperatures ranging from 500 to 900°C are basically mayenite and lime, while one of the final products obtained by calcination at and above 1000°C is probably tricalcium aluminate (Ca3Al2O6). For the hydrocalumite samples calcined at temperatures below 1000°C, their lamellar structure can be completely recovered in deionized water at room temperature. However, the further increase of calcination temperature could impair the regeneration ability of hydrocalumite via contact with water. Upon calcination of hydrocalumite at 1000–1500°C followed by reaction with water, a stable compound tricalcium aluminate hexahydrate (Ca3Al2O6·6H2O) was produced, which is the reason why less hydrocalumite could be regenerated.http://dx.doi.org/10.1155/2014/454098 |
| spellingShingle | Jiao Tian Qinghai Guo Thermal Decomposition of Hydrocalumite over a Temperature Range of 400–1500°C and Its Structure Reconstruction in Water Journal of Chemistry |
| title | Thermal Decomposition of Hydrocalumite over a Temperature Range of 400–1500°C and Its Structure Reconstruction in Water |
| title_full | Thermal Decomposition of Hydrocalumite over a Temperature Range of 400–1500°C and Its Structure Reconstruction in Water |
| title_fullStr | Thermal Decomposition of Hydrocalumite over a Temperature Range of 400–1500°C and Its Structure Reconstruction in Water |
| title_full_unstemmed | Thermal Decomposition of Hydrocalumite over a Temperature Range of 400–1500°C and Its Structure Reconstruction in Water |
| title_short | Thermal Decomposition of Hydrocalumite over a Temperature Range of 400–1500°C and Its Structure Reconstruction in Water |
| title_sort | thermal decomposition of hydrocalumite over a temperature range of 400 1500°c and its structure reconstruction in water |
| url | http://dx.doi.org/10.1155/2014/454098 |
| work_keys_str_mv | AT jiaotian thermaldecompositionofhydrocalumiteoveratemperaturerangeof4001500canditsstructurereconstructioninwater AT qinghaiguo thermaldecompositionofhydrocalumiteoveratemperaturerangeof4001500canditsstructurereconstructioninwater |