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).

  • Patent number: 8968667
    Abstract: 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: Grant
    Filed: June 16, 2011
    Date of Patent: March 3, 2015
    Assignees: Saint-Gobain Centre de Recherches et d'Etudes Europeen, Centre National de la Recherche Scientifique, Universite Claude Bernard-Lyon 1
    Inventors: Agnes Princivalle, Philippe Vernoux, Abdelkader Hadjar, Christian Guizard
  • Patent number: 8802044
    Abstract: 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: Grant
    Filed: December 16, 2009
    Date of Patent: August 12, 2014
    Assignees: Saint-Gobain Centre de Recherches et d'Etudes Europeen, Centre National de la Recherche Scientifique
    Inventors: Philippe Vernoux, Abdelkader Hadjar, Agnes Princivalle, Christian Guizard
  • Patent number: 8591845
    Abstract: 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: Grant
    Filed: June 16, 2011
    Date of Patent: November 26, 2013
    Assignees: Saint-Gobain Centre de Recherches et d'Etudes Europeen, Centre National de la Recherche Scientifique, Universite Claude Bernard-Lyon 1
    Inventors: Agnes Princivalle, Philippe Vernoux, Abdelkader Hadjar, Christian Guizard
  • Patent number: 8465631
    Abstract: 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: Grant
    Filed: October 2, 2008
    Date of Patent: June 18, 2013
    Assignee: Saint-Gobain Centre de Recherches et d'Etudes Europeen
    Inventors: Philippe Vernoux, Abdelkader Hadjar, Ahmed Marouf
  • Publication number: 20130142702
    Abstract: 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: Application
    Filed: June 16, 2011
    Publication date: June 6, 2013
    Applicants: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN, UNIVERSITE CLAUDE BERNARD - LYON 1, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Agnes Princivalle, Philippe Vernoux, Abdelkader Hadjar, Christian Guizard
  • Publication number: 20130136676
    Abstract: 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: Application
    Filed: June 16, 2011
    Publication date: May 30, 2013
    Applicants: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN, UNIVERSITE CLAUDE BERNARD-LYON 1, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Agnes Princivalle, Philippe Vernoux, Abdelkader Hadjar, Christian Guizard
  • Publication number: 20110250112
    Abstract: 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: Application
    Filed: December 16, 2009
    Publication date: October 13, 2011
    Applicants: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, SAINT-GOBAIN CENTRE DE RECH. ET D'ETUDES EUROPEEN
    Inventors: Philippe Vernoux, Abdelkader Hadjar, Agnes Princivalle, Christian Guizard
  • Publication number: 20100287916
    Abstract: 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: Application
    Filed: October 2, 2008
    Publication date: November 18, 2010
    Applicant: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUR.
    Inventors: Philippe Vernoux, Abdelkader Hadjar, Ahmed Marouf