SO 2 adsorption and transformation on calcined NiAl hydrotalcite-like compounds surfaces: An in situ FTIR and DFT study
Flower-like hydrotalcite-based NiAl mixed oxides with high surface area were synthesized by urea hydrolysis approach, and employed for SO 2 removal. The catalyst was well characterized by TGA, ICP, XRD, SEM, TEM and N 2 adsorption/desorption isotherm analyses. The calcined NiAlO showed excellent SO...
| Main Authors: | , , , |
|---|---|
| Format: | Journal Article |
| Published: |
2012
|
| Online Access: | http://hdl.handle.net/20.500.11937/42086 |
| _version_ | 1848756323002351616 |
|---|---|
| author | Zhao, L. Li, Xin Yong Hao, C. Raston, C. |
| author_facet | Zhao, L. Li, Xin Yong Hao, C. Raston, C. |
| author_sort | Zhao, L. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Flower-like hydrotalcite-based NiAl mixed oxides with high surface area were synthesized by urea hydrolysis approach, and employed for SO 2 removal. The catalyst was well characterized by TGA, ICP, XRD, SEM, TEM and N 2 adsorption/desorption isotherm analyses. The calcined NiAlO showed excellent SO 2 adsorption and its adsorption equilibrium was of a type I isotherm, which significantly improved the adsorption performance for low-concentration SO 2. XPS and TPD methods were conducted to identify the sulfate species. Specifically, in situ Fourier transform infrared spectroscopy revealed that adsorbed SO 2 molecules formed surface bidentate binuclear sulfate. Density functional theory based computations interpreted the vibrational data associated with the NiAlO surface and confirmed that sulfate species adopted a binuclear bidentate binding configuration on the surface of NiAlO catalyst. |
| first_indexed | 2025-11-14T09:10:22Z |
| format | Journal Article |
| id | curtin-20.500.11937-42086 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:10:22Z |
| publishDate | 2012 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-420862017-09-13T14:20:15Z SO 2 adsorption and transformation on calcined NiAl hydrotalcite-like compounds surfaces: An in situ FTIR and DFT study Zhao, L. Li, Xin Yong Hao, C. Raston, C. Flower-like hydrotalcite-based NiAl mixed oxides with high surface area were synthesized by urea hydrolysis approach, and employed for SO 2 removal. The catalyst was well characterized by TGA, ICP, XRD, SEM, TEM and N 2 adsorption/desorption isotherm analyses. The calcined NiAlO showed excellent SO 2 adsorption and its adsorption equilibrium was of a type I isotherm, which significantly improved the adsorption performance for low-concentration SO 2. XPS and TPD methods were conducted to identify the sulfate species. Specifically, in situ Fourier transform infrared spectroscopy revealed that adsorbed SO 2 molecules formed surface bidentate binuclear sulfate. Density functional theory based computations interpreted the vibrational data associated with the NiAlO surface and confirmed that sulfate species adopted a binuclear bidentate binding configuration on the surface of NiAlO catalyst. 2012 Journal Article http://hdl.handle.net/20.500.11937/42086 10.1016/j.apcatb.2012.01.034 restricted |
| spellingShingle | Zhao, L. Li, Xin Yong Hao, C. Raston, C. SO 2 adsorption and transformation on calcined NiAl hydrotalcite-like compounds surfaces: An in situ FTIR and DFT study |
| title | SO 2 adsorption and transformation on calcined NiAl hydrotalcite-like compounds surfaces: An in situ FTIR and DFT study |
| title_full | SO 2 adsorption and transformation on calcined NiAl hydrotalcite-like compounds surfaces: An in situ FTIR and DFT study |
| title_fullStr | SO 2 adsorption and transformation on calcined NiAl hydrotalcite-like compounds surfaces: An in situ FTIR and DFT study |
| title_full_unstemmed | SO 2 adsorption and transformation on calcined NiAl hydrotalcite-like compounds surfaces: An in situ FTIR and DFT study |
| title_short | SO 2 adsorption and transformation on calcined NiAl hydrotalcite-like compounds surfaces: An in situ FTIR and DFT study |
| title_sort | so 2 adsorption and transformation on calcined nial hydrotalcite-like compounds surfaces: an in situ ftir and dft study |
| url | http://hdl.handle.net/20.500.11937/42086 |