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Storage and Reduction of NO x Over LNT Catalysts

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Abstract

In this paper, fundamental issues of the NSR technology are addressed. The reaction paths and the mechanism involved in the storage of NO x and the relevance of the proximity between the noble metal and the alkali or alkaline-earth component of the catalyst are discussed first. Then the release of NO x , the reaction pathways of NO x reduction by different reducing agents, and the mechanisms involved in the formation of N2, NH3 and N2O are illustrated. The use of the combined technologies LNT + SCR and DPNR is addressed next and key aspects that highlight the synergies of the individual technologies are discussed. Finally, the perspectives of the NSR technology are outlined.

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Acknowledgments

The authors thank Dr. William Epling for useful discussion and suggestions.

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Forzatti, P., Lietti, L. & Castoldi, L. Storage and Reduction of NO x Over LNT Catalysts. Catal Lett 145, 483–504 (2015). https://doi.org/10.1007/s10562-014-1343-0

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