Effect of CuSAPO-34 catalyst preparation method on NOx removal from diesel vehicle exhausts
CuSAPO-34 samples prepared by hydrothermal synthesis (HS), pore-volume impregnation (PVI), and ion-exchange (IE) methods were characterized using X-ray diffraction, scanning electronic microscopy, atomic absorption spectroscopy, temperature-programmed reduction with hydrogen, X-ray absorption near-e...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Elsevier
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/48995 |
| _version_ | 1848758142305828864 |
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| author | Zuo, Y. Han, Lina Bao, W. Chang, L. Wang, J. |
| author_facet | Zuo, Y. Han, Lina Bao, W. Chang, L. Wang, J. |
| author_sort | Zuo, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | CuSAPO-34 samples prepared by hydrothermal synthesis (HS), pore-volume impregnation (PVI), and ion-exchange (IE) methods were characterized using X-ray diffraction, scanning electronic microscopy, atomic absorption spectroscopy, temperature-programmed reduction with hydrogen, X-ray absorption near-edge structure spectroscopy, X-ray photoelectron spectroscopy, and N2 adsorption. The selective catalytic reduction (SCR) ability over CuSAPO-34 for NOx from a simulated diesel exhaust was investigated through C3H6-SCR and NH3-SCR, before and after aging of the CuSAPO-34 catalyst. The results indicated that the sample prepared by IE had significantly better activity compared with those prepared using HS and PVI, especially in C3H6-SCR at temperatures below 300 °C. The activity of CuSAPO-34 in NO SCR was affected by the preparation method as a result of changes in the specific area (A[BET]), pore-size distribution, and the valence state of the active component. The active component of the catalyst prepared by HS was mainly Cu2+, whereas those of samples prepared by IE and PVI were mainly Cu+. Aging treatment can destroy the structure of thecatalyst, decrease its surface area, and reduce the number of active Cu components on the catalyst surface, leading to a visible decrease in catalytic activity. The CuSAPO-34 prepared using the PVI method had the smallest decrease in NO SCR activity after aging, showing that it had better anti-aging properties. |
| first_indexed | 2025-11-14T09:39:17Z |
| format | Journal Article |
| id | curtin-20.500.11937-48995 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:39:17Z |
| publishDate | 2013 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-489952017-03-15T22:56:26Z Effect of CuSAPO-34 catalyst preparation method on NOx removal from diesel vehicle exhausts Zuo, Y. Han, Lina Bao, W. Chang, L. Wang, J. Pore volume impregnation CuSAPO-34 Hydrothermal synthesis Aging Selective catalytic reduction Ion-exchange CuSAPO-34 samples prepared by hydrothermal synthesis (HS), pore-volume impregnation (PVI), and ion-exchange (IE) methods were characterized using X-ray diffraction, scanning electronic microscopy, atomic absorption spectroscopy, temperature-programmed reduction with hydrogen, X-ray absorption near-edge structure spectroscopy, X-ray photoelectron spectroscopy, and N2 adsorption. The selective catalytic reduction (SCR) ability over CuSAPO-34 for NOx from a simulated diesel exhaust was investigated through C3H6-SCR and NH3-SCR, before and after aging of the CuSAPO-34 catalyst. The results indicated that the sample prepared by IE had significantly better activity compared with those prepared using HS and PVI, especially in C3H6-SCR at temperatures below 300 °C. The activity of CuSAPO-34 in NO SCR was affected by the preparation method as a result of changes in the specific area (A[BET]), pore-size distribution, and the valence state of the active component. The active component of the catalyst prepared by HS was mainly Cu2+, whereas those of samples prepared by IE and PVI were mainly Cu+. Aging treatment can destroy the structure of thecatalyst, decrease its surface area, and reduce the number of active Cu components on the catalyst surface, leading to a visible decrease in catalytic activity. The CuSAPO-34 prepared using the PVI method had the smallest decrease in NO SCR activity after aging, showing that it had better anti-aging properties. 2013 Journal Article http://hdl.handle.net/20.500.11937/48995 Elsevier restricted |
| spellingShingle | Pore volume impregnation CuSAPO-34 Hydrothermal synthesis Aging Selective catalytic reduction Ion-exchange Zuo, Y. Han, Lina Bao, W. Chang, L. Wang, J. Effect of CuSAPO-34 catalyst preparation method on NOx removal from diesel vehicle exhausts |
| title | Effect of CuSAPO-34 catalyst preparation method on NOx removal from diesel vehicle exhausts |
| title_full | Effect of CuSAPO-34 catalyst preparation method on NOx removal from diesel vehicle exhausts |
| title_fullStr | Effect of CuSAPO-34 catalyst preparation method on NOx removal from diesel vehicle exhausts |
| title_full_unstemmed | Effect of CuSAPO-34 catalyst preparation method on NOx removal from diesel vehicle exhausts |
| title_short | Effect of CuSAPO-34 catalyst preparation method on NOx removal from diesel vehicle exhausts |
| title_sort | effect of cusapo-34 catalyst preparation method on nox removal from diesel vehicle exhausts |
| topic | Pore volume impregnation CuSAPO-34 Hydrothermal synthesis Aging Selective catalytic reduction Ion-exchange |
| url | http://hdl.handle.net/20.500.11937/48995 |