Improved activity of W-modified MnOx-TiO2 catalysts for the selective catalytic reduction of NO with NH3
The performances of a series of W-modified MnOx–TiO2 catalysts were investigated for selective catalytic reduction (SCR) of NOx with NH3. The catalyst prepared by one-pot co-precipitation method with an elementary ratio of W:Mn:Ti = 0.25:0.25:0.5 in raw materials showed a highest activity and a wide...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/24210 |
| _version_ | 1848751366069026816 |
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| author | Wang, X. Li, X. Zhao, Q. Sun, W. Tade, Moses Liu, S. |
| author_facet | Wang, X. Li, X. Zhao, Q. Sun, W. Tade, Moses Liu, S. |
| author_sort | Wang, X. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The performances of a series of W-modified MnOx–TiO2 catalysts were investigated for selective catalytic reduction (SCR) of NOx with NH3. The catalyst prepared by one-pot co-precipitation method with an elementary ratio of W:Mn:Ti = 0.25:0.25:0.5 in raw materials showed a highest activity and a widest operation temperature window with 100% NOx conversion within 80–280 °C. We suggest that the enhancement in reducibility of manganese and dominant active Mn4+ species is likely one predominant factor accounting for the excellent SCR performance of the best catalyst. In situ FTIR studies revealed that after W doping, more Brønsted and Lewis acid sites formed on the catalyst surface, as well as more active intermediates (monodentate nitrate) during reaction, are also responsible for the high activity both at low and medium temperatures. |
| first_indexed | 2025-11-14T07:51:35Z |
| format | Journal Article |
| id | curtin-20.500.11937-24210 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:51:35Z |
| publishDate | 2016 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-242102017-09-13T15:08:55Z Improved activity of W-modified MnOx-TiO2 catalysts for the selective catalytic reduction of NO with NH3 Wang, X. Li, X. Zhao, Q. Sun, W. Tade, Moses Liu, S. The performances of a series of W-modified MnOx–TiO2 catalysts were investigated for selective catalytic reduction (SCR) of NOx with NH3. The catalyst prepared by one-pot co-precipitation method with an elementary ratio of W:Mn:Ti = 0.25:0.25:0.5 in raw materials showed a highest activity and a widest operation temperature window with 100% NOx conversion within 80–280 °C. We suggest that the enhancement in reducibility of manganese and dominant active Mn4+ species is likely one predominant factor accounting for the excellent SCR performance of the best catalyst. In situ FTIR studies revealed that after W doping, more Brønsted and Lewis acid sites formed on the catalyst surface, as well as more active intermediates (monodentate nitrate) during reaction, are also responsible for the high activity both at low and medium temperatures. 2016 Journal Article http://hdl.handle.net/20.500.11937/24210 10.1016/j.cej.2015.12.002 restricted |
| spellingShingle | Wang, X. Li, X. Zhao, Q. Sun, W. Tade, Moses Liu, S. Improved activity of W-modified MnOx-TiO2 catalysts for the selective catalytic reduction of NO with NH3 |
| title | Improved activity of W-modified MnOx-TiO2 catalysts for the selective catalytic reduction of NO with NH3 |
| title_full | Improved activity of W-modified MnOx-TiO2 catalysts for the selective catalytic reduction of NO with NH3 |
| title_fullStr | Improved activity of W-modified MnOx-TiO2 catalysts for the selective catalytic reduction of NO with NH3 |
| title_full_unstemmed | Improved activity of W-modified MnOx-TiO2 catalysts for the selective catalytic reduction of NO with NH3 |
| title_short | Improved activity of W-modified MnOx-TiO2 catalysts for the selective catalytic reduction of NO with NH3 |
| title_sort | improved activity of w-modified mnox-tio2 catalysts for the selective catalytic reduction of no with nh3 |
| url | http://hdl.handle.net/20.500.11937/24210 |