Centre National De La Recherche Scientifique

Saint-gobain Centre De Recherches Et D'etudes Europeen

Universite Claude Bernard – Lyon1

Agnes Princivalle

Christian Gilbert Guizard

Philippe Vernoux

Abdelkader Hadjar

Michaela Klotz

Helena Kaper

Daniel Aubert

Catalyst system suitable especially for the removal of CO compounds, comprising or consisting of an oxide, preferably of fluorite crystalline structure, conforming to the following molar formulation:CeMADO,wherein Ce is cerium, A represents at least one element possessing a plurality of oxidation states and selected from Ti, Ga, In, V, Cr, Mn, Fe, Sn, Co, Ni, Cu, M represents at least one element selected from Gd, Y, Sc, Sm, Nd, Pr, Zn, D represents at least one element other than A and selected from Pt, Pd, Rh, Ru, Cu, Fe, Ag, and Au, u is between 0.05 and 0.45, y is between 0.01 and 0.4, Z is greater than 0 and less than 0.4, v is between 0.001 and 0.4, and x is greater than 0.

Exhaust gas treatment catalyst

The present invention relates to an electrocatalytic system for the joint treatment of oxidizing polluting entities of the NOtype and reducing polluting entities of the hydrocarbons HC or CO type present in a gas to be purified, in particular an exhaust gas resulting from a combustion engine, said system comprising:

Electrochemical catalysis system

The invention relates to a filtration structure, for filtering a gas coming from a diesel engine, which is laden with gaseous pollutants of the nitrogen oxide NOtype and with solid particles, of the particulate filter type, said filtration structure being characterized in that it includes a catalytic system comprising at least one noble metal or transition metal suitable for reducing the NOand a support material, in which said support material comprises or is made of a zirconium oxide partially substituted with a trivalent cation Mor with a divalent cation M', said zirconium oxide being in a reduced, oxygen-sub-stoichiometric, state.

Purification structure including a catalysis system supported by a zircon in reduced state

The present invention relates to the use, for the reduction of oxidizing contaminating entities of the NOtype, in particular NO, present in a gas to be purified, of a catalytic system comprising or composed of an oxide corresponding to the molar formulation:CeOMN,

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Agnes Princivalle