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Technical University of Crete
Technical University of Crete
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| URI | http://purl.tuc.gr/dl/dias/5F0FB3D4-8975-403A-8665-C7AE820D3138 | - |
| Identifier | http://www.sciencedirect.com/science/article/pii/S0926337306003353 | - |
| Identifier | https://doi.org/10.1016/j.apcatb.2006.07.011 | - |
| Language | en | - |
| Extent | 9 pages | en |
| Title | Novel doubly-promoted catalysts for the lean NOx reduction by H2 + CO: Pd(K)/Al2O3–(TiO2) | en |
| Creator | Konsolakis Michail | en |
| Creator | Κονσολακης Μιχαηλ | el |
| Creator | Vrontaki Maria | en |
| Creator | Βροντακη Μαρια | el |
| Creator | Avgouropoulos, George | en |
| Creator | Ioannides T. | en |
| Creator | Gentekakis Ioannis | en |
| Creator | Γεντεκακης Ιωαννης | el |
| Publisher | Elsevier | en |
| Content Summary | The reduction of NO by CO + H2 in the presence of excess O2 has been studied on dispersed, low loading 0.5 wt.% Pd-based catalysts. Two different methods of promotion were imposed separately and together, in order to investigate the feasibility of their synergy to enhance de-NOx efficiency of the catalytic system. Therefore, the Pd-catalysed NO + CO + H2 + O2 reaction was gradually studied over: (i) Pd/Al2O3–(TiO2) catalysts (support-mediated promotion by modifying the Al2O3 support with TiO2), (ii) K-dosed Pd(K)/Al2O3 catalysts (surface-induced promotion by modifying the Pd surface with the addition of K), and (iii) doubly-promoted Pd(K)/Al2O3–(TiO2) catalysts. Both (i) and (ii) methods of promotion were found to significantly promote the system, when acting individually. However, the de-NOx efficiency and N2-selectivity of the doubly-promoted Pd(K)/Al2O3–(TiO2) catalysts were found to be better than both of the other two cases, indicating a synergy during the simultaneous imposition of the two methods of promotion. The resulted benefits with the optimal doubly-promoted catalyst were very high, ∼85%, NOx conversion in a very wide temperature range (100–400 °C), accompanied by very good N2-selectivities of ∼85%, i.e., 15–30 additional percentage units in comparison to the selectivity of the original un-promoted Pd/Al2O3 catalyst. | en |
| Type of Item | Peer-Reviewed Journal Publication | en |
| Type of Item | Δημοσίευση σε Περιοδικό με Κριτές | el |
| License | http://creativecommons.org/licenses/by/4.0/ | en |
| Date of Item | 2015-10-31 | - |
| Date of Publication | 2006 | - |
| Subject | Lean NOx reduction | en |
| Subject | Palladium | en |
| Subject | Potassium | en |
| Subject | Promotion | en |
| Bibliographic Citation | M. Konsolakis, M. Vrontaki, G. Avgouropoulos, T. Ioannides and I. V. Yentekakis, "Novel doubly-promoted catalysts for the lean NOx reduction by H2 + CO: Pd(K)/Al2O3–(TiO2)", Appl. Catal. B, vol. 68, no. 1-2, pp. 59-67, Oct. 2006. doi:10.1016/j.apcatb.2006.07.011 | en |
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