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Open AccessArticle

On the Effect of Preparation Methods of PdCe-MOR Catalysts as NOx CH4-SCR System for Natural Gas Vehicles Application

1
Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
2
Sorbonne Universités, UPMC Université Paris 06, UMR 7190, Institut Jean le Rond d’Alembert, Paris F-75005, France
3
Institut Jean le Rond d’Alembert, UMR 7190, CNRS, Saint-Cyr-l’École F-78210, France
*
Author to whom correspondence should be addressed.
Academic Editor: Jae-Soon Choi
Catalysts 2015, 5(4), 1815-1830; https://doi.org/10.3390/catal5041815
Received: 1 September 2015 / Revised: 12 October 2015 / Accepted: 12 October 2015 / Published: 27 October 2015
(This article belongs to the Special Issue Automotive Emission Control Catalysts)
In the present work, the effect of several parameters involved in the preparation of PdCe-HMOR catalysts active for NOx selective catalytic reduction with methane (NOx CH4-SCR) was studied. Results show that the catalytic performance of Pd-HMOR is better when palladium is introduced by ion-exchange, namely at room temperature. It was also shown that Pd loading does not influence the formation of cerium species, namely surface Ce4+ (CeO2) species and CeO2 species in interaction with Pd. However, when Ce is introduced before Pd, more surface CeO2 species are stabilized in the support and less CeO2 become in interaction with Pd, which results in a worse NOx CH4-SCR catalytic performance. View Full-Text
Keywords: NOx HC-SCR; methane; MOR; palladium; cerium; preparation method NOx HC-SCR; methane; MOR; palladium; cerium; preparation method
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Mendes, A.N.; Ribeiro, M.F.; Henriques, C.; Da Costa, P. On the Effect of Preparation Methods of PdCe-MOR Catalysts as NOx CH4-SCR System for Natural Gas Vehicles Application. Catalysts 2015, 5, 1815-1830.

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