A synchrotron radiation study of the hydrothermal synthesis of layered double hydroxides from MgO and Al2O3 slurries
The hydrothermal reaction of slurries containing MgO and Cp3 alumina has been investigated in situ using energy dispersive X-ray diffraction (EDXRD). A range of temperatures (100, 150, 180 and 240 °C) were studied. Kinetic data for the formation of the hydrotalcite-like Mg-Al layered double hydroxid...
| Main Authors: | , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2007
|
| _version_ | 1797091654077775872 |
|---|---|
| author | Mitchell, S Biswick, T Jones, W Williams, G O'Hare, D |
| author_facet | Mitchell, S Biswick, T Jones, W Williams, G O'Hare, D |
| author_sort | Mitchell, S |
| collection | OXFORD |
| description | The hydrothermal reaction of slurries containing MgO and Cp3 alumina has been investigated in situ using energy dispersive X-ray diffraction (EDXRD). A range of temperatures (100, 150, 180 and 240 °C) were studied. Kinetic data for the formation of the hydrotalcite-like Mg-Al layered double hydroxide (LDH) have been determined. At 100 °C the LDH is the predominant phase that is formed but at higher temperatures the impurity phases brucite and boehmite become more significant. The rate of reaction increases with temperature in agreement with Arrhenius behaviour and the LDH growth curves exhibit sigmoidal kinetics. The rate of formation of the LDH phase was found to be approximately equal to the rate of consumption of MgO, indicating that the mechanism of LDH formation is unlikely to proceed via a long-lasting intermediate phase. © The Royal Society of Chemistry 2007. |
| first_indexed | 2024-03-07T03:36:05Z |
| format | Journal article |
| id | oxford-uuid:bc54af8d-47c6-418a-b1dd-7011e922141b |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:36:05Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | oxford-uuid:bc54af8d-47c6-418a-b1dd-7011e922141b2022-03-27T05:23:38ZA synchrotron radiation study of the hydrothermal synthesis of layered double hydroxides from MgO and Al2O3 slurriesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:bc54af8d-47c6-418a-b1dd-7011e922141bEnglishSymplectic Elements at Oxford2007Mitchell, SBiswick, TJones, WWilliams, GO'Hare, DThe hydrothermal reaction of slurries containing MgO and Cp3 alumina has been investigated in situ using energy dispersive X-ray diffraction (EDXRD). A range of temperatures (100, 150, 180 and 240 °C) were studied. Kinetic data for the formation of the hydrotalcite-like Mg-Al layered double hydroxide (LDH) have been determined. At 100 °C the LDH is the predominant phase that is formed but at higher temperatures the impurity phases brucite and boehmite become more significant. The rate of reaction increases with temperature in agreement with Arrhenius behaviour and the LDH growth curves exhibit sigmoidal kinetics. The rate of formation of the LDH phase was found to be approximately equal to the rate of consumption of MgO, indicating that the mechanism of LDH formation is unlikely to proceed via a long-lasting intermediate phase. © The Royal Society of Chemistry 2007. |
| spellingShingle | Mitchell, S Biswick, T Jones, W Williams, G O'Hare, D A synchrotron radiation study of the hydrothermal synthesis of layered double hydroxides from MgO and Al2O3 slurries |
| title | A synchrotron radiation study of the hydrothermal synthesis of layered double hydroxides from MgO and Al2O3 slurries |
| title_full | A synchrotron radiation study of the hydrothermal synthesis of layered double hydroxides from MgO and Al2O3 slurries |
| title_fullStr | A synchrotron radiation study of the hydrothermal synthesis of layered double hydroxides from MgO and Al2O3 slurries |
| title_full_unstemmed | A synchrotron radiation study of the hydrothermal synthesis of layered double hydroxides from MgO and Al2O3 slurries |
| title_short | A synchrotron radiation study of the hydrothermal synthesis of layered double hydroxides from MgO and Al2O3 slurries |
| title_sort | synchrotron radiation study of the hydrothermal synthesis of layered double hydroxides from mgo and al2o3 slurries |
| work_keys_str_mv | AT mitchells asynchrotronradiationstudyofthehydrothermalsynthesisoflayereddoublehydroxidesfrommgoandal2o3slurries AT biswickt asynchrotronradiationstudyofthehydrothermalsynthesisoflayereddoublehydroxidesfrommgoandal2o3slurries AT jonesw asynchrotronradiationstudyofthehydrothermalsynthesisoflayereddoublehydroxidesfrommgoandal2o3slurries AT williamsg asynchrotronradiationstudyofthehydrothermalsynthesisoflayereddoublehydroxidesfrommgoandal2o3slurries AT ohared asynchrotronradiationstudyofthehydrothermalsynthesisoflayereddoublehydroxidesfrommgoandal2o3slurries AT mitchells synchrotronradiationstudyofthehydrothermalsynthesisoflayereddoublehydroxidesfrommgoandal2o3slurries AT biswickt synchrotronradiationstudyofthehydrothermalsynthesisoflayereddoublehydroxidesfrommgoandal2o3slurries AT jonesw synchrotronradiationstudyofthehydrothermalsynthesisoflayereddoublehydroxidesfrommgoandal2o3slurries AT williamsg synchrotronradiationstudyofthehydrothermalsynthesisoflayereddoublehydroxidesfrommgoandal2o3slurries AT ohared synchrotronradiationstudyofthehydrothermalsynthesisoflayereddoublehydroxidesfrommgoandal2o3slurries |