Patents by Inventor Abdelkader Hadjar
Abdelkader Hadjar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8968667Abstract: The present invention relates to an electrocatalytic system for the joint treatment of oxidizing polluting entities of the NOx type 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: a catalyst A for reduction of the polluting entities of the NOx type, a catalyst B for oxidation of the polluting entities of the hydrocarbons HC type and CO, a compound E which conducts electrons and ions by oxide ions, said catalysts A and B being in contact with the compound E, said compound E being composed of an oxide which conducts ions and electrons corresponding to the molar formulation: Ce1-y-zO2-xMyNz in which Ce is cerium, M is an element chosen from: Gd, Y, Sc, Sm, La, Pr, Nd, Er or Tb, y is between 0.01 and 0.4, N is an element having several degrees of valency chosen from: Ti, V, Cr, Mn, Fe, Co, Ni or Cu, z is less than 0.4 and x is greater than 0.05.Type: GrantFiled: June 16, 2011Date of Patent: March 3, 2015Assignees: Saint-Gobain Centre de Recherches et d'Etudes Europeen, Centre National de la Recherche Scientifique, Universite Claude Bernard-Lyon 1Inventors: Agnes Princivalle, Philippe Vernoux, Abdelkader Hadjar, Christian Guizard
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Patent number: 8802044Abstract: 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 NOx type 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 NOx and a support material, in which said support material comprises or is made of a zirconium oxide partially substituted with a trivalent cation M3+ or with a divalent cation M?2+, said zirconium oxide being in a reduced, oxygen-sub-stoichiometric, state.Type: GrantFiled: December 16, 2009Date of Patent: August 12, 2014Assignees: Saint-Gobain Centre de Recherches et d'Etudes Europeen, Centre National de la Recherche ScientifiqueInventors: Philippe Vernoux, Abdelkader Hadjar, Agnes Princivalle, Christian Guizard
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Patent number: 8591845Abstract: The present invention relates to the use, for the reduction of oxidizing contaminating entities of the NOx type, in particular NO2, present in a gas to be purified, of a catalytic system comprising or composed of an oxide corresponding to the molar formulation: Ce1-y-zO2-xMyNz, in which: Ce is cerium, M is an element chosen from: Gd, Y, Sc, Sm, La, Pr, Nd, Er or Tb, y is between 0.01 and 0.4, N is an element having several degrees of valency chosen from: Ti, V, Cr, Mn, Fe, Co, Ni or Cu, z is less than 0.4, x is greater than 0.05.Type: GrantFiled: June 16, 2011Date of Patent: November 26, 2013Assignees: Saint-Gobain Centre de Recherches et d'Etudes Europeen, Centre National de la Recherche Scientifique, Universite Claude Bernard-Lyon 1Inventors: Agnes Princivalle, Philippe Vernoux, Abdelkader Hadjar, Christian Guizard
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Patent number: 8465631Abstract: A device for the purification of a polluted gas, for example an exhaust gas from a diesel or gasoline engine, comprising, in combination: A honeycomb structure, comprising at least one porous electron-conductive material forming the walls (1) of said structure and an electrochemical system for treating said gas, comprising a layer (7) of an ionically conductive and electronically insulating material D, a reduction catalyst A (9) for reducing the polluting species of the NOx type and an oxidation catalyst B (4) for oxidizing the polluting species of the soot, hydrocarbon HC, CO or H2 type, said electrochemical system being configured in the form of an electrode W and a counterelectrode CE; and means for applying a voltage or a current between said electrode W and said counterelectrode CE.Type: GrantFiled: October 2, 2008Date of Patent: June 18, 2013Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeenInventors: Philippe Vernoux, Abdelkader Hadjar, Ahmed Marouf
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Publication number: 20130142702Abstract: The present invention relates to an electrocatalytic system for the joint treatment of oxidizing polluting entities of the NOx type 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: a catalyst A for reduction of the polluting entities of the NOx type, a catalyst B for oxidation of the polluting entities of the hydrocarbons HC type and CO, a compound E which conducts electrons and ions by oxide ions, said catalysts A and B being in contact with the compound E, said compound E being composed of an oxide which conducts ions and electrons corresponding to the molar formulation: Ce1-y-zO2-xMyNz in which Ce is cerium, M is an element chosen from: Gd, Y, Sc, Sm, La, Pr, Nd, Er or Tb, y is between 0.01 and 0.4, N is an element having several degrees of valency chosen from: Ti, V, Cr, Mn, Fe, Co, Ni or Cu, z is less than 0.4 and x is greater than 0.05.Type: ApplicationFiled: June 16, 2011Publication date: June 6, 2013Applicants: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN, UNIVERSITE CLAUDE BERNARD - LYON 1, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Agnes Princivalle, Philippe Vernoux, Abdelkader Hadjar, Christian Guizard
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Publication number: 20130136676Abstract: The present invention relates to the use, for the reduction of oxidizing contaminating entities of the NOx type, in particular NO2, present in a gas to be purified, of a catalytic system comprising or composed of an oxide corresponding to the molar formulation: Ce1-y-zO2-xMyNz, in which: Ce is cerium, M is an element chosen from: Gd, Y, Sc, Sm, La, Pr, Nd, Er or Tb, y is between 0.01 and 0.4, N is an element having several degrees of valency chosen from: Ti, V, Cr, Mn, Fe, Co, Ni or Cu, z is less than 0.4, x is greater than 0.05.Type: ApplicationFiled: June 16, 2011Publication date: May 30, 2013Applicants: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN, UNIVERSITE CLAUDE BERNARD-LYON 1, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Agnes Princivalle, Philippe Vernoux, Abdelkader Hadjar, Christian Guizard
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Publication number: 20110250112Abstract: 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 NOx type 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 NOx and a support material, in which said support material comprises or is made of a zirconium oxide partially substituted with a trivalent cation M3+ or with a divalent cation M?2+, said zirconium oxide being in a reduced, oxygen-sub-stoichiometric, state.Type: ApplicationFiled: December 16, 2009Publication date: October 13, 2011Applicants: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, SAINT-GOBAIN CENTRE DE RECH. ET D'ETUDES EUROPEENInventors: Philippe Vernoux, Abdelkader Hadjar, Agnes Princivalle, Christian Guizard
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Publication number: 20100287916Abstract: A device for the purification of a polluted gas, for example an exhaust gas from a diesel or gasoline engine, comprising, in combination: A honeycomb structure, comprising at least one porous electron-conductive material forming the walls (1) of said structure and an electrochemical system for treating said gas, comprising a layer (7) of an ionically conductive and electronically insulating material D, a reduction catalyst A (9) for reducing the polluting species of the NOx type and an oxidation catalyst B (4) for oxidizing the polluting species of the soot, hydrocarbon HC, CO or H2 type, said electrochemical system being configured in the form of an electrode W and a counterelectrode CE; and means for applying a voltage or a current between said electrode W and said counterelectrode CE.Type: ApplicationFiled: October 2, 2008Publication date: November 18, 2010Applicant: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUR.Inventors: Philippe Vernoux, Abdelkader Hadjar, Ahmed Marouf