Enhanced catalytic performance of Cu/Ag/CeO2 catalyst for the SCR of NO by propylene
The modification of the Cu(4)/CeO2, catalyst with 1 wt% of Ag resulted in a significant increase in the NO reduction activity compared to 2 and 3 wt% Ag. The Cu(4)/Ag(1)CeO2 catalyst consisted of isolated Cu2+ species and Ag(n)delta+ clusters, while the Cu(4)/Ag(3)CeO2 catalyst contained mostly octa...
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Universiti Teknologi Petronas
2004
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| Online Access: | http://eprints.utm.my/5136/1/NorAishahSaidinaAmin2004_EnhancedCatalyticPerformanceOfCu%3AAg%3ACeO2.pdf http://eprints.utm.my/5136/ |
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| author | Saidina Amin, Nor Aishah Chong, C. M. |
| author_facet | Saidina Amin, Nor Aishah Chong, C. M. |
| author_sort | Saidina Amin, Nor Aishah |
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| country | Malaysia |
| description | The modification of the Cu(4)/CeO2, catalyst with 1 wt% of Ag resulted in a significant increase in the NO reduction activity compared to 2 and 3 wt% Ag. The Cu(4)/Ag(1)CeO2 catalyst consisted of isolated Cu2+ species and Ag(n)delta+ clusters, while the Cu(4)/Ag(3)CeO2 catalyst contained mostly octahedral Cu2+ species as indicated by the results from the UV-Vis DRS characterization. Therefore, it is presumed that isolated Cu2+ species on the Cu(4)/Ag(1)CeO2 catalyst and Ag(n)delta+ clusters formed active-sites responsible towards a higher catalytic activity for NO reduction by propylene compared to octahedral Cu2+ species. The competitiveness factor S(SCR-HC) for Cu(4)/Ag(3)CeO2
catalyst was much lower than Cu(4)/Ag(1)CeO2 catalyst in the whole temperature range, indicating that the high loading of Ag enhanced the oxidation of C3H6 by O2. As a result, less amount of C3H6 reacted selectively with NO. In addition, the selectivity of CO for NO +C3H6 + O2 reactions was higher than those for C3H6 + O2 reactions on all the Cu(4)/Ag/CeO2 catalysts indicating the generation of organic intermediates by partial oxidation of hydrocarbon which would lead to the production of significant amount of CO related to NO reduction. |
| format | Article |
| id | my.utm.eprints-5136 |
| institution | Universiti Teknologi Malaysia |
| language | en |
| publishDate | 2004 |
| publisher | Universiti Teknologi Petronas |
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| spelling | my.utm.eprints-51362017-10-09T06:08:30Z http://eprints.utm.my/5136/ Enhanced catalytic performance of Cu/Ag/CeO2 catalyst for the SCR of NO by propylene Saidina Amin, Nor Aishah Chong, C. M. T Technology (General) The modification of the Cu(4)/CeO2, catalyst with 1 wt% of Ag resulted in a significant increase in the NO reduction activity compared to 2 and 3 wt% Ag. The Cu(4)/Ag(1)CeO2 catalyst consisted of isolated Cu2+ species and Ag(n)delta+ clusters, while the Cu(4)/Ag(3)CeO2 catalyst contained mostly octahedral Cu2+ species as indicated by the results from the UV-Vis DRS characterization. Therefore, it is presumed that isolated Cu2+ species on the Cu(4)/Ag(1)CeO2 catalyst and Ag(n)delta+ clusters formed active-sites responsible towards a higher catalytic activity for NO reduction by propylene compared to octahedral Cu2+ species. The competitiveness factor S(SCR-HC) for Cu(4)/Ag(3)CeO2 catalyst was much lower than Cu(4)/Ag(1)CeO2 catalyst in the whole temperature range, indicating that the high loading of Ag enhanced the oxidation of C3H6 by O2. As a result, less amount of C3H6 reacted selectively with NO. In addition, the selectivity of CO for NO +C3H6 + O2 reactions was higher than those for C3H6 + O2 reactions on all the Cu(4)/Ag/CeO2 catalysts indicating the generation of organic intermediates by partial oxidation of hydrocarbon which would lead to the production of significant amount of CO related to NO reduction. Universiti Teknologi Petronas 2004 Article PeerReviewed application/pdf en http://eprints.utm.my/5136/1/NorAishahSaidinaAmin2004_EnhancedCatalyticPerformanceOfCu%3AAg%3ACeO2.pdf Saidina Amin, Nor Aishah and Chong, C. M. (2004) Enhanced catalytic performance of Cu/Ag/CeO2 catalyst for the SCR of NO by propylene. Proceedings of The 18th Symposium of Malaysian Chemical Engineers SOMChE 2004 . pp. 1-73. |
| spellingShingle | T Technology (General) Saidina Amin, Nor Aishah Chong, C. M. Enhanced catalytic performance of Cu/Ag/CeO2 catalyst for the SCR of NO by propylene |
| title | Enhanced catalytic performance of Cu/Ag/CeO2 catalyst for the SCR of NO by propylene |
| title_full | Enhanced catalytic performance of Cu/Ag/CeO2 catalyst for the SCR of NO by propylene |
| title_fullStr | Enhanced catalytic performance of Cu/Ag/CeO2 catalyst for the SCR of NO by propylene |
| title_full_unstemmed | Enhanced catalytic performance of Cu/Ag/CeO2 catalyst for the SCR of NO by propylene |
| title_short | Enhanced catalytic performance of Cu/Ag/CeO2 catalyst for the SCR of NO by propylene |
| title_sort | enhanced catalytic performance of cu/ag/ceo2 catalyst for the scr of no by propylene |
| topic | T Technology (General) |
| url | http://eprints.utm.my/5136/1/NorAishahSaidinaAmin2004_EnhancedCatalyticPerformanceOfCu%3AAg%3ACeO2.pdf http://eprints.utm.my/5136/ |
| url_provider | http://eprints.utm.my/ |