Perovskite Patents (Class 502/525)
  • Patent number: 8946113
    Abstract: The present invention relates to an Fe-modified perovskite-type catalyst, a method for preparing same and a method for preparing a synthesis gas by a combined reforming reaction using same. More particularly, it relates to a catalyst for a combined natural gas/steam/carbon dioxide reforming reaction having a perovskite structure with La and Sr introduced at the A site and Ni and Fe introduced at the B site with specific molar ratios and a method for producing a synthesis gas for Fischer-Tropsch synthesis or methanol synthesis using the catalyst by the combined reforming reaction. The catalyst of the present invention exhibits higher carbon dioxide conversion rate, significantly reduced catalyst deactivation caused by carbon deposition and improved long-term catalyst stability and activity, as compared to the existing catalyst for reforming reaction prepared by the impregnation method.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: February 3, 2015
    Assignee: Korea Institute of Science and Technology
    Inventors: Dong Ju Moon, Eun Hyeok Yang, Jin Hee Lee, Hyun Jin Kim, Byoung Sung Ahn, Sang Woo Kim, Jae Sun Jung
  • Patent number: 8765092
    Abstract: A non-stoichiometric perovskite oxide having the general chemical formula LaXMnOY, in which the molar ratio of lanthanum to manganese (“X”) ranges from 0.85 to 0.95, can be used in particle form as an oxidation catalyst to oxidize NO to NO2 in an exhaust aftertreatment system for a hydrocarbon-fueled engine. The oxygen content (“Y”) fluctuates with variations in the molar ratio of lanthanum to manganese but generally falls somewhere in the range of 3.0 to 3.30. The crystal lattice adjustments spurred by the non-stoichiometric molar ratio of lanthanum to manganese are believed responsible for an enhanced NO oxidative activity relative to similar perovskite oxides with a higher molar ratio of lanthanum and manganese.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: July 1, 2014
    Assignees: GM Global Technology Operations LLC, Tianjin University
    Inventors: Gongshin Qi, Wei Li, Xinquan Wang, Meiqing Shen
  • Patent number: 8513155
    Abstract: An exhaust aftertreatment system for a lean-burn engine may include a lean NOX trap that comprises a catalyst material. The catalyst material may remove NOX gases from the engine-out exhaust emitted from the lean-burn engine. The catalyst material may include a NOX oxidation catalyst that comprises a perovskite compound.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: August 20, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Wei Li, Chang H Kim, Gongshin Qi
  • Patent number: 8409518
    Abstract: A sulfur tolerant oxidation catalyst with appreciable NO and HC oxidation capabilities has been developed for use in any component of an exhaust aftertreatment system for a lean-burn engine where the oxidation of at least NO is desired. Several non-exclusive examples of such components where the oxidation catalyst may be employed include a DOC and a LNT. The oxidation catalyst may comprise perovskite oxide particles that support palladium particles. The ability of the palladium supported perovskite oxide particles to concurrently oxidize NO and HC's can significantly diminish or altogether eliminate the use of platinum in the exhaust aftertreatment system for at least NO oxidation. The oxidation catalyst, moreover, may exhibit superior thermal durability and better NO and HC oxidation activities than platinum in some instances.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: April 2, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Chang H Kim, Wei Li, Richard J. Blint
  • Patent number: 8377400
    Abstract: An after-treatment system architecture and method for oxidizing the nitric oxide component of a gas stream are disclosed. One embodiment may include treatment of a gas stream that includes NOx with a perovskite catalyst of the general formula ABO3 or a modified formula of ABO3 wherein a small amount of a promoter material is substituted for a portion of at least one of element A or element B in a catalytic oxidation reaction to oxidize nitric oxide in the gas stream.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: February 19, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Steven J. Schmieg, Chang H Kim, Gongshin Qi, Wei Li, David B. Brown
  • Patent number: 8361925
    Abstract: The exhaust gas-purifying catalyst includes at least one of a first composite oxide represented by a formula A(Al2-xBx)O4 and a second composite oxide represented by a formula (Al2-yCy)O3, wherein element A is a divalent transition metal other than platinum-group elements, each of elements B and C is a transition metal other than platinum-group elements, x satisfies 0<x<2, and y satisfies 0<y<2.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: January 29, 2013
    Assignees: Cataler Corporation, Daihatsu Motor Co., Ltd.
    Inventors: Satoshi Matsueda, Mareo Kimura, Hiroto Yoshida, Keiichi Narita, Hirohisa Tanaka, Mari Uenisha, Masashi Taniguchi
  • Patent number: 8343888
    Abstract: Precursor cations of A and B elements of an ABO3 perovskite in aqueous solution are formed as an ionic complex gel with citric acid or other suitable polybasic carboxylic acid. The aqueous gel is coated onto a desired catalyst substrate and calcined to form, in-situ, particles of the crystalline perovskite as, for example, an oxidation catalyst on the substrate. In one embodiment, a perovskite catalyst such as LaCoO3 is formed on catalyst supporting cell walls of an extruded ceramic monolith for oxidation of NO in the exhaust gas of a lean burn vehicle engine.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: January 1, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Chang H Kim, Wei Li, Kevin A Dahlberg
  • Patent number: 8268274
    Abstract: One embodiment of the invention may include a product comprising a catalyst combination comprising a perovskite catalyst and a second catalyst that is not a perovskite catalyst.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: September 18, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Chang H Kim, David B. Brown, Wei Li, Steven J. Schmieg, Gongshin Qi
  • Patent number: 8247113
    Abstract: Materials of the titanate type of perovskite or derived structure and their uses for the production of electrodes, more particularly in the cell elements of an SOFC cell or the cell elements of a high-temperature steam electrolysis cell.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: August 21, 2012
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Gilles Gauthier, Thibaud Delahaye
  • Patent number: 8147990
    Abstract: A ceramic material with a negative temperature coefficient of specific resistance has the general formula [{(SE1III,SE2III)1?x(M1II,M2II)x}(Cr1?y?zMny(Me1III,Me2III)z)O3]. In this formula, SE1III and SE2III are different rare-earth metal cations, M1II and M2II are selected from CaII, SrII, and Me1III and Me2III are redox-stable, trivalent metal cations, wherein the following applies with respect to the parameters: 0<x<1; 0<z<1; 0<y<1?z.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: April 3, 2012
    Assignee: EPCOS AG
    Inventors: Claus Cernoch, Adalbert Feltz
  • Patent number: 8119554
    Abstract: Shaped bodies having catalytic properties which can be obtained by a process comprising the steps: a) production of a shaped body by means of a powder-based rapid prototyping process, b) if appropriate, a heat treatment of the shaped body, c) if appropriate, application of at least one catalytically active component to the shaped body, d) if appropriate, a further heat treatment, where steps b), c) and/or d) can be carried out a number of times, are used as reactor internals in heterogeneously catalyzed chemical reactions.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: February 21, 2012
    Assignee: BASF SE
    Inventors: Nawid Kashani-Shirazi, Veronika Wloka, Wolfgang Gerlinger, Andrea Schmidt, Kerstin Heinen, Wolfgang Kollenberg
  • Patent number: 7964167
    Abstract: An after-treatment system architecture and method for oxidizing the nitric oxide component of an exhaust stream from a hydrocarbon fueled power source operated with a fuel lean combustion mixture.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: June 21, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Chang H Kim, Wei Li, Kevin A Dahlberg
  • Patent number: 7955529
    Abstract: This invention discloses the synthesis of a bifunctional La0.6Ca0.4Co1-xIrxO3 (x=0˜1) perovskite compound with a superb bifunctional catalytic ability for the oxygen reduction and generation in alkaline electrolytes. Synthetic routes demonstrated include solid state reaction, amorphous citrate precursor, and mechanical alloying. The interested compound demonstrates notable enhancements over commercially available La0.6Ca0.4CoO3.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: June 7, 2011
    Assignee: National Chiao Tung University
    Inventors: Pu-Wei Wu, Yun-Min Chang
  • Patent number: 7700816
    Abstract: An oxygenate conversion catalyst useful in the conversion of oxygenates such as methanol to olefinic products may be improved by the use of a catalyst combination based on a molecular sieve in combination with a co-catalyst comprising a mixed metal oxide composition which has oxidation/reduction functionality under the conditions of the conversion. This metal oxide co-catalyst component will comprise a mixed oxide of one or more, preferably at least two, transition metals, usually of Series 4, 5 or 6 of the Periodic Table, with the metals of Series 4 being preferred, as an essential component of the mixed oxide composition. The preferred transition metals are those of Groups 5, especially titanium and vanadium, Group 6, especially chromium or molybdenum, Group 7, especially manganese and Group 8, especially cobalt or nickel. Other metal oxides may also be present.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: April 20, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Teng Xu, Tan-Jen Chen, Neeraj Sangar, John Di Yi Ou
  • Patent number: 7670410
    Abstract: A carbon-dioxide-gas absorber includes a main component of composite oxide, the composite oxide including Ti and X that is at least one of Sr and Ba, and the composite oxide having a molar ratio (X/Ti) of about 1.8 to about 2.2. A substance having a perovskite structure and an (X/Ti) of about 0.9 to about 1.1 or at least one selected from green sheets, green sheet wastes, green-sheet-laminate wastes, and precursors of green sheets including the substance is fired with at least one of strontium carbonate and barium carbonate. An apparatus includes a carbon-dioxide-gas-absorbing mechanical unit that allows a carbon-dioxide-gas absorber to absorb a carbon dioxide gas at about 1.0×104 to about 1.0×106 Pa and at about 500° C. to about 900° C.; and a carbon-dioxide-gas-evolving mechanical unit that evolves the absorbed carbon dioxide gas at about 1000 Pa or less and at at least about 750° C.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: March 2, 2010
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Yoshinori Saito, Yukio Sakabe
  • Patent number: 7666812
    Abstract: An improved gas diffusion electrode composed of a perovskite-type oxide dispersed in a mixture of carbon black and a hydrophobic binder polymer. An improved catalyst for use in the electrochemical reduction of oxygen comprising a perovskite-type compound having alpha and beta sites, and having a greater molar ratio of cations at the beta site. A particularly good reduction catalyst is a neodymium calcium manganite. An improved method of dispersing the catalysts with carbon in a reaction layer of the electrode improves performance of the electrode and the oxygen reduction process. This is provided by adding carbon black to an aqueous solution of metal salts before it is heated to a gel and then to a char and then calcined. Optionally, a quantity of the desired oxide catalyst can be premixed with a portion the carbon before adding the carbon to an aqueous solution of the metal salts to be heated.
    Type: Grant
    Filed: August 10, 2007
    Date of Patent: February 23, 2010
    Assignee: Ceramatec, Inc.
    Inventors: John Howard Gordon, Hachiya Toshinori, Shekar Balagopal, Sai Bhavaraju
  • Patent number: 7662358
    Abstract: The invention relates to fine-particled alkaline-earth titanates and to a method for the production thereof by reacting alkaline-earth metal compounds with titanium dioxide particles. The titanium dioxide particles have a BET-surface greater than 50 m2/g. The titanium dioxide particles can have a very low sulphate, chloride and carbon content. The reaction can take place at a temperature below 700° C. The alkaline-earth titanate can have a BET-surface of 5-100 m2/g. Advantageously, it does not contain any hydroxyl groups in the crystal lattice. The alkaline-earth titanate can be used in the production of microelectronic components.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: February 16, 2010
    Assignee: Tronox Pigments GmbH
    Inventors: Gerhard Auer, Werner Schuy, Anna Röttger, Dieter Völtzke, Harald Schwarz, Hans-Peter Abicht
  • Patent number: 7641875
    Abstract: A multi-phase catalyst for the simultaneous conversion of oxides of nitrogen, carbon monoxide, and hydrocarbons is provided. A catalyst composition comprising the multi-phase catalyst and methods of making the catalyst composition are also provided. The multi-phase catalyst may be represented by the general formula of CeyLn1-xAx+sMOZ, wherein Ln is a mixture of elements originally in the form of single-phase mixed lanthanides collected from natural ores, a single lanthanide, or a mixture of lanthanides; A is an element selected from a group consisting of Mg, Ca, Sr, Ba, Li, Na, K, Cs, Rb, or any combination thereof; and M is an element selected from the group consisting of Fe, Mn, Cr, Ni, Co, Cu, V, Zr, Pt, Pd, Rh, Ru, Ag, Au, Al, Ga, Mo, W, Ti, or any combination thereof; x is a number defined by 0?x<1.0; y is a number defined by 0?y<10; s is a number defined by 0?s<10; where s=0 only when y>0 and y=0 only when s>0.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: January 5, 2010
    Assignee: Catalytic Solutions, Inc.
    Inventor: Stephen J. Golden
  • Patent number: 7622418
    Abstract: To provide a method for industrially efficiently producing an exhaust gas purifying catalyst containing a perovskite-type composite oxide which is stable and has a less reduced specific surface area and is also effectively prevented from decreasing in its catalytic performance even in endurance in high temperature oxidative reducing atmospheres, a pre-crystallization composition containing elementary components constituting a perovskite-type composite oxide containing a noble metal is prepared, is mixed with a powder of theta-alumina and/or alpha-alumina to prepare a mixture, and the mixture is heat treated. Thus, the resulting perovskite-type composite oxide supported by the powder of theta-alumina and/or alpha-alumina can keep its thermostability at a sufficient level thereby to effectively prevent the catalytic performance from decreasing. This method can industrially efficiently produce the exhaust gas purifying catalyst.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: November 24, 2009
    Assignees: Daihatsu Motor Company, Ltd., Hokko Chemical Industry Co., Ltd.
    Inventors: Hirohisa Tanaka, Isao Tan, Mari Uenishi, Nobuhiko Kajita, Masashi Taniguchi, Yasunori Sato, Keiichi Narita, Noboru Sato
  • Patent number: 7585809
    Abstract: A purification catalyst for exhaust gas which exhibits satisfactory performance even at a low temperature operation of starting or idling of engine (not more than 400° C.), and a production method therefore are provided. The catalyst comprises an aluminum oxide supporting Pd, and the aluminum oxide is LnAlO3 (Ln: rare-earth metal).
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: September 8, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuichi Matsuo, Norihiko Suzuki, Kazunori Kiguchi, Atsushi Furukawa
  • Patent number: 7514055
    Abstract: Methods of controlling emissions from a diesel engine are provided. The method includes contacting the emissions with a perovskite-type catalyst consisting essentially of a metal oxide composition represented by the general formula Aa?xBxMOb, in which A is a mixture originally in the form of single phase mixed lanthanides collected from bastnasite; B is a divalent or monovalent cation; M is at least one element selected from the group consisting of M is at least one element selected from the group consisting of elements of an atomic number of from 22 to 30, 40 to 51, and 73 to 80; a is 1 or 2; b is 3 when a is 1 or b is 4 when a is 2; and x is a number defined by 0<x<0.7. The perovskite-type catalyst may be used to oxidize hydrocarbons and carbon monoxide and to control particulate emissions in the diesel exhaust.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: April 7, 2009
    Assignee: Catalytic Solutions, Inc.
    Inventor: Stephen J. Golden
  • Patent number: 7504085
    Abstract: An alumina-based perovskite is formed by mixing a lanthanide source with a transitional alumina to form a dual-phase composition comprising in-situ formed LnAlO3 dispersed in alumina. The lanthanide content of the composition ranges from 6-35 wt. % to yield a high surface area composition which is useful as a catalyst or catalyst support such as for precious metals.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: March 17, 2009
    Assignee: BASF Catalysts LLC
    Inventor: Xiaolin David Yang
  • Patent number: 7381394
    Abstract: Methods of producing a safe and hygienic method for industrially and efficiently producing a perovskite-type composite oxide are provided that can maintain the catalytic activity of a noble metal at a high level. Methods include preparing a precursor of the perovskite-type composite oxide by mixing organometal salts of elementary components of the perovskite-type composite oxide and heat treating the precursor. The precursor may be prepared by mixing all elementary components constituting the perovskite-type composite oxide, or by mixing one or more organometal salts of part of the elementary components with the other elementary components prepared as alkoxides, a coprecipitate of salts, or a citrate complex of the respective elements.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: June 3, 2008
    Assignees: Daihatsu Motor Co., Ltd., Hokko Chemical Industry Co. Ltd.
    Inventors: Hirohisa Tanaka, Kimiyoshi Kaneko
  • Patent number: 7347887
    Abstract: Composites and methods useful for oxygen sorption and other uses are presented, the composites comprising: (A) one or more crystalline ceramic oxides selected from compounds within general formula (1): AxA?x?ByB?y?O3-? and ??(1) (B) one or more crystalline ceramic oxides selected from compounds within general formulas (2), (3), (4), (5), (6), (7), and (8): A2BO4-???(2) A2B2O5-???(3) AO(ABO3-?)n??(4) AM2Cu3O7-???(5) Bi4V2(1-x)Me2xO11-3x,??(6) A?B?O3??(7) A2B2O7-?.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: March 25, 2008
    Assignee: The BOC Group, Inc.
    Inventors: Martin Bülow, Jürgen Böer, Wolfgang Burckhardt, Hans Ulrich Guth, Helmut Ullmann, Vladimir V. Vashook
  • Patent number: 7338917
    Abstract: A purification catalyst for exhaust gas enhances the activity for each precious metal by effectively utilizing the precious metal without incurring a high production cost, thereby improving endurance. The purification catalyst for exhaust gas comprises a composite oxide supporting Pd, the composite oxide has a rational formula MXO3 in which M is an alkali metal element and X is an element in group 5 in periodic table, and a perovskite crystal structure.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: March 4, 2008
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuichi Matsuo, Kazunori Kiguchi, Norihiko Suzuki, Atsushi Furukawa
  • Patent number: 7338549
    Abstract: Compositions and methods useful for oxygen sorption and other uses are presented, the compositions A composite material comprising components (A) and (B), wherein component (A) is selected from crystalline ceramic materials capable of forming a stable, reversible perovskite crystal phase at elevated temperatures (T>500° C.), and combinations thereof, and component (B) comprises a metal selected from rhodium (Rh), platinum (Pt), palladium (Pd), nickel (Ni) and silver (Ag), and combinations and alloys of these metals.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: March 4, 2008
    Assignee: The BOC Group, Inc.
    Inventors: Martin Bülow, Jürgen Böer, Wolfgang Burckhardt, Hans Ulrich Guth, Helmut Ullmann, Vladimir V. Vashook
  • Patent number: 7303606
    Abstract: Production of oxygen-enriched gas streams is disclosed herein. Air streams contact an oxygen-selective mixed conductor particularly a perovskite material whereby oxygen is retained or adsorbed on the perovskite and can be employed in a variety of processes such as in combusting a fuel gas, heat recovery and boiler related operations.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: December 4, 2007
    Assignee: The BOC Group, Inc.
    Inventors: Yongxian Zeng, Divyanshu R. Acharya, Satish S. Tamhankar, Narayanan Ramprasad, Ramakrishnan Ramachandran, Frank R. Fitch, Donald L. MacLean, Jerry Y. S. Lin, Richard H. Clarke
  • Patent number: 7297322
    Abstract: A process for producing powders of metal compound containing oxygen including the steps of: feeding at least one material selected from a liquid material and a solution material obtained by dissolving solid ingredient in organic solvent via a liquid flow controller into a vaporizer; vaporizing the materials in the vaporizer; adding oxygen; heating; cooling; and crystallizing. Also disclosed is the product formed by this process, and apparatus used in performing the process. The process and the apparatus enable easily mass-producing fine powders of metal compound containing oxygen used as materials for optical crystals, nonlinear crystals or magneto-optical crystals with reasonable production cost.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: November 20, 2007
    Assignee: Japan Pionics Co., Ltd.
    Inventors: Yukichi Takamatsu, Koji Kiriyama, Akira Asano, Takafumi Ishii
  • Patent number: 7291321
    Abstract: A perovskite catalyst is prepared using a ceramic sol-sol methodology comprising preparing slurry in water of an alkaline earth metal salt, a powdered metal salt and a powdered transition metal oxide, adding a polymeric binder to form a paste, drying and comminuting the paste into a powder and heating the powder with a temperature profile to calcination temperatures. In one embodiment the slurry is formed of titanium oxide with barium carbonate and tin chloride in deionized water, and more specifically by a mixture according to Ba (1-0.05x)+TiO2+SnCl2(0.05x) where x is in moles. The perovskite catalyst is preferably used in a process for oxidative coupling of methane. Catalyst performance is enhanced through the addition of halides to the feed gas in the reaction.
    Type: Grant
    Filed: April 28, 2004
    Date of Patent: November 6, 2007
    Assignee: HRD Corp.
    Inventors: Ebrahim Bagherzadeh, Abbas Hassan, Aziz Hassan
  • Patent number: 7259126
    Abstract: An improved gas diffusion electrode composed of a perovskite-type oxide dispersed in a mixture of carbon black and a hydrophobic binder polymer. An improved catalyst for use in the electrochemical reduction of oxygen comprising a perovskite-type compound having alpha and beta sites, and having a greater molar ratio of cations at the beta site. A particularly good reduction catalyst is a neodymium calcium manganite. An improved method of dispersing the catalysts with carbon in a reaction layer of the electrode improves performance of the electrode and the oxygen reduction process. This is provided by adding carbon black to an aqueous solution of metal salts before it is heated to a gel and then to a char and then calcined. Optionally, a quantity of the desired oxide catalyst can be premixed with a portion the carbon before adding the carbon to an aqueous solution of the metal salts to be heated.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: August 21, 2007
    Assignee: Ceramatec, Inc.
    Inventors: John H. Gordon, Hachiya Toshinori, Shekar H. Balagopal, Sai V. Bhavaraju
  • Patent number: 7205257
    Abstract: To provide an exhaust gas purifying catalyst which can maintain the catalytic activity at a high level over a long time and can achieve satisfactory emission control performance, an exhaust gas purifying catalyst is prepared so as to contain a noble metal, a perovskite-type composite oxide represented by the following general formula (3), and theta-alumina and/or alpha-alumina: AB1-mNmO3??(3) wherein A represents at least one element selected from rare-earth elements and alkaline earth metals; B represents at least one element selected from Al and transition elements excluding rare-earth elements and noble metals; N represents a noble metal; and m represents an atomic ratio of N satisfying the following relation: 0<m<0.5.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: April 17, 2007
    Assignees: Daihatsu Motor Co., Ltd., Cataler Corporation
    Inventors: Hirohisa Tanaka, Isao Tan, Mari Uenishi, Nobuhiko Kajita, Masashi Taniguchi, Yasunori Sato, Keiichi Narita, Noboru Sato
  • Patent number: 7205256
    Abstract: An oxide material characterized by that it has a perovskite structure comprising an oxide represented by ABO3, (Bi2O2)2+ (Am?1BmO3m+1)2? wherein A represents one kind or two or more kinds of ions selected from the group consisting of Li+, Na+, K+, Pb2+, Ca2+, Sr2+, Ba2+, Bi3+, Y3+, Mn3+ and La3+, B represents one kind or two or more kinds of ions selected from the group consisting of Ru3+, Fe3+, Ti4+, Zr4+, Cu4+, Nb5+, Ta5+, V5+, W6+ and Mo6+, and m represents a natural number of 1 or more, LnBa2Cu3O7, Z2Ba2Can?1CunO2n+4 or ZBa2Can?1CunO2n+3, wherein Ln represents one kind or two or more kinds of ions selected from the group consisting of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, Z represents one kind or two or more kinds of ions selected from the group consisting of Bi, Tl and Hg, and n represents a natural number of from 1 to 5; and a catalytic substance containing one or more kinds of elements selected from the group consisting of Si, Ge and Sn.
    Type: Grant
    Filed: September 3, 2001
    Date of Patent: April 17, 2007
    Assignees: Sharp Kabushiki Kaisha, Japan represented by President of Tokyo Institute of Technology
    Inventors: Takeshi Kijima, Hiroshi Ishiwara
  • Patent number: 7199079
    Abstract: A purification catalyst for exhaust gas enhances the activities of the precious metals, preventing decrease of activities at high temperature, and exhibiting a satisfactory performance during operation. In the purification catalyst of the present invention, Pd is supported by an aluminum composite oxide having a perovskite structure, the aluminum composite oxide is LnAl1?xMxO3 in which Ln is a rare-earth element, and the element M in the LnAl1?xMxO3 is one of elements in groups 1 to 5 and groups 12 to 14.
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: April 3, 2007
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuichi Matsuo, Atsushi Furukawa, Norihiko Suzuki, Kazunori Kiguchi
  • Patent number: 7183236
    Abstract: An object of the present invention is to realize low pressure loss and high purification performance in a constitution in which a primary catalyst component and co-catalyst component are loaded onto a ceramic support that allows catalyst components to be loaded directly. According to the present invention, a primary catalyst component in the form of a catalyst precious metal and a co-catalyst component in the form of an oxygen occluding component are loaded on the surface of a honeycomb-shaped ceramic support, including the inner surfaces of pores. As a result of the large loaded amount of co-catalyst component entering inside the pores, the loaded amount of co-catalyst component on the cell wall surfaces is reduced, thereby making it possible to inhibit increases in pressure loss. In addition, since the primary catalyst component and co-catalyst component are in close proximity to each other, catalyst performance is improved.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: February 27, 2007
    Assignee: Denso Corporation
    Inventors: Tomomi Hase, Tomohiko Nakanishi, Hideaki Ueno, Takatoshi Shinyoshi
  • Patent number: 7166267
    Abstract: Materials with a perovskite structure in form of solid solutions with general formula: AzZr1?xBxO3 Where A is Ba or a rare earth element, B is Pt, Ir, Rh or Ce z is 1 when A is Ba and is ? when A is a rare earth, x is in the range 0.01 and 0.8.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: January 23, 2007
    Assignee: Universita Degli Studi di L'Aquila
    Inventor: Pierluigi Villa
  • Patent number: 7151067
    Abstract: A porous catalyst layer containing mixed conducting oxide having substantially a perovskite structure and containing a first element selected from Co and Fe, and a second element selected from In, Sn and Y arranged in the B site in the perovskite structure is contiguous to a second surface (1a) of a selective oxygen-permeable dense continuous layer (1) containing mixed conducting oxide. A porous intermediate catalyst layer (3) containing mixed conducting oxide and at least one of Co, Fe, Mn and Pd is contiguous to a first layer (1b) of the dense continuous layer (1). A porous reactive catalyst layer (4) provided with a metal catalyst selected from at least one of Ni, Co, Ru, Rh, Pt, Pd, Ir and Re and a support is continguous to the porous intermediate catalyst layer (3) in a manner to sandwich between the dense continuous layer (1) and the porous reactive catalyst layer (4).
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: December 19, 2006
    Assignees: Nippon Steel Corporation, Teikoku Oil Co., Ltd.
    Inventors: Tadashi Sakon, Wataru Ito, Hitoshi Dohnomae, Toru Nagai, Hideki Kurimura, Shouichi Kaganoi, Youhei Suzuki, Takashi Ito
  • Patent number: 7030054
    Abstract: The present invention provides new platinum group metal (“PGM”) free catalytic compositions that comprise silver and/or cobalt stabilized ceria. These compositions facilitate soot oxidation during the regeneration of diesel particulate filters (DPF) thereby replacing PGM formulations. The compositions of the invention are particularly useful as washcoat compositions for DPFs as part of an automotive after-treatment system. Among the formulations tested, the silver-stabilized ceria and cobalt-stabilized ceria formulations e.g. can oxidize soot at 250–300° C. in the presence of NO2 and oxygen, while silver-stabilized ceria can oxidize diesel soot even in the presence of oxygen as the sole oxidizing agent at these temperatures. A perovshite composition containing Ag—La—Mn was very active at temperatures above 300° C.
    Type: Grant
    Filed: April 18, 2003
    Date of Patent: April 18, 2006
    Assignee: Ford Global Technologlies, LLC.
    Inventors: Albert N Chigapov, Alexei A Dubkov, Brendan Patrick Carberry, Robert Walter McCabe
  • Patent number: 7001867
    Abstract: The present invention relates to improved catalyst compositions, as well as methods of making and using such compositions. In particular, preferred embodiments of the present invention comprise rare earth catalyst supports, catalyst compositions having rare earth supports, and methods of preparing and using the catalysts and supports. Accordingly, the present invention also encompasses an improved method for converting a hydrocarbon containing gas and an oxygen containing gas to a gas mixture comprising hydrogen and carbon monoxide, i.e., syngas, using the rare earth catalyst supports in accordance with the present invention. In addition, the present invention contemplates an improved method for converting hydrocarbon gas to liquid hydrocarbons using the novel syngas catalyst supports and compositions described herein.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: February 21, 2006
    Assignee: ConocoPhillips Company
    Inventors: Yaming Jin, Tianyan Niu, Harold A. Wright
  • Patent number: 6946213
    Abstract: The invention relates to perovskite oxide electrode materials in which one or more of the elements Mg, Ni, Cu, and Zn are present as minority components that enhance electrochemical performance, as well as electrode products with these compositions and methods of making the electrode materials. Such electrodes are useful in electrochemical system applications such as solid oxide fuel cells, ceramic oxygen generation systems, gas sensors, ceramic membrane reactors, and ceramic electrochemical gas separation systems.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: September 20, 2005
    Assignee: NexTech Materials, Ltd.
    Inventors: Matthew M. Seabaugh, Scott L. Swartz
  • Patent number: 6664117
    Abstract: A method of forming a multi-layered, spin-coated perovskite thin film on a wafer includes preparing a perovskite precursor solution including mixing solid precursor material into acetic acid forming a mixed solution; heating the mixed solution in air for between about one hour to six hours; and filtering the solution when cooled; placing a wafer in a spin-coating mechanism; spinning the wafer at a speed of between about 500 rpm to 3500 rpm; injecting the precursor solution onto the wafer surface; baking the coated wafer at a temperature of between about 100° C. to 300° C.; annealing the coated wafer at a temperature of between about 400° C. to 650° C. in an oxygen atmosphere for between about two minutes to ten minutes; repeating the spinning, injecting, baking and annealing steps until a perovskite thin film of desired thickness is obtained; and annealing the perovskite thin film at a temperature of between about 500° C. to 750° C.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: December 16, 2003
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Wei-Wei Zhuang, Sheng Teng Hsu, Jong-Jan Lee
  • Patent number: 6569803
    Abstract: A catalyst, for purifying an exhaust gas, contains at least one catalyst component from among Pt, Pd, Rh, Au, Ag and Ir, and a complex oxide of the perovskite type comprising at least two different metal elements. In the catalyst, the catalyst component is carried on the complex oxide.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: May 27, 2003
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Masahiko Takeuchi
  • Patent number: 6536210
    Abstract: An exhaust gas purification apparatus for an internal combustion engine capable of lean operation has an Ir-containing selectively reducing catalyst and an NOx adsorptive catalyst. The Ir-containing selectively reducing catalyst in which iridium is an active species thereof and NOx is selectively reduced in a lean atmosphere by HC as a reducer is disposed in an exhaust system of the internal combustion engine. The Ir-containing selectively reducing catalyst is disposed on an upstream side of the exhaust system. The NOx adsorptive catalyst adsorbs NOx in the lean atmosphere and reduce the adsorbed NOx at a theoretical air-fuel ratio or at a rich air-fuel ratio. The NOx adsorptive catalyst is disposed on a downstream side of the exhaust system.
    Type: Grant
    Filed: July 7, 1999
    Date of Patent: March 25, 2003
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Isao Komoriya, Ken Ogawa, Yasunori Ehara, Masanori Hayashi
  • Patent number: 6534031
    Abstract: A process for synthesizing a family of non-pillared metal oxide triple layered perovskite has been developed. The perovskite has a surface area of at least 30 m2/g and an empirical formula of AB2M3O10−x where A is a monovalent exchangeable cation such as cesium, B is a divalent or trivalent cation such as strontium or lanthanum and M is a +2, +3, +4 or a +5 valent metal such as niobium, titanium, aluminum or copper. The process involves forming a reaction mixture containing reactive sources of A, B and M at a pH greater than seven and a temperature and time sufficient to form the perovskite. A process for removing contaminants from effluent streams using the above perovskites is also disclosed.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: March 18, 2003
    Assignee: UOP LLC
    Inventor: Robert L. Bedard
  • Patent number: 6531425
    Abstract: Perovskite-type catalyst consists essentially of a metal oxide composition is provided. The metal oxide composition is represented by the general formula Aa−xBxMOb, in which A is a mixture of elements originally in the form of single phase mixed lanthanides collected from bastnasite; B is a divalent or monovalent cation; M is at least one element selected from the group consisting of elements of an atomic number of from 23 to 30, 40 to 51, and 73 to 80; a is 1 or 2; b is 3 when a is 1 or b is 4 when a is 2; and x is a number defined by 0≦x<0.5. Methods of making and using the perovskite-type catalysts are also provided. The perovskite-type catalyst may be used to make a catalytic converter. Methods of making a catalytic converter are also provided.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: March 11, 2003
    Assignee: Catalytic Solutions, Inc.
    Inventor: Stephen J. Golden
  • Patent number: 6471921
    Abstract: The invention relates to mixed phase materials for the preparation of catalytic membranes which exhibit ionic and electronic conduction and which exhibit improved mechanical strength compared to single phase ionic and electronic conducting materials. The mixed phase materials are useful for forming gas impermeable membranes either as dense ceramic membranes or as dense thin films coated onto porous substrates. The membranes and materials of this invention are useful in catalytic membrane reactors in a variety of applications including synthesis gas production. One or more crystalline second phases are present in the mixed phase material at a level sufficient to enhance the mechanical strength of the mixture to provide membranes for practical application in CMRs.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: October 29, 2002
    Assignee: Eltron Research, Inc.
    Inventors: Pamela Van Calcar, Richard Mackay, Anthony F. Sammells
  • Patent number: 6352955
    Abstract: Perovskite-type catalyst consists essentially of a metal oxide composition is provided. The metal oxide composition is represented by the general formula A1−xBxMO3, in which A is a mixture of elements originally in the form of single phase mixed lanthanides collected from bastnasite; B is a divalent or monovalent cation; M is at least one element selected from the group consisting of elements of an atomic number of from 22 to 30, 40 to 51, and 73 to 80; and x is a number defined by 0≦x<0.5.
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: March 5, 2002
    Assignee: Catalytic Solutions, Inc.
    Inventor: Stephen J. Golden
  • Patent number: 6293978
    Abstract: A process for converting organic compounds using composite materials in membrane reactors. The composite materials include a gas-tight ceramic, a porous metallic support, and an interfacial zone therebetween eliminate the need for mechanical seals between two such dissimilar materials. Oxygen ion-conducting dense ceramic membranes are formed on a porous metallic alloy to provide an interfacial zone identifiable by a gradient of composition in at least one metallic element across the interfacial zone between the dense ceramic membrane and the porous support. Processes using composite materials in accordance with the invention are, for example, used for production of synthesis gas comprising carbon monoxide and molecular hydrogen, whereby the synthesis gas is, advantageously, free of deleterious and/or inert gaseous diluents such as nitrogen.
    Type: Grant
    Filed: January 9, 2001
    Date of Patent: September 25, 2001
    Assignee: BP Corporation North America Inc.
    Inventors: Mark S. Kleefisch, Carl A. Udovich, Joseph G. Masin, Thaddeus P. Kobylinski
  • Patent number: 6262325
    Abstract: The catalyst comprises at least one alkali metal on a support which has the general formula (I) An′Tim′Zrp′Hfq′On′+2(m′+p′+q′)  (I) where A is a divalent metal, 20·(m′+p′+q′)>n′>0.05·(m′+p′+q′), and which may be doped with at least one compound of an alkali metal and/or alkaline earth metal, where the alkali metal/support ratio by weight is 0.01-5:1 and, when a dopant is present, the dopant/support ratio by weight is 0.01-5:1, and where the proportion of support phase corresponding to the ZrO2 structure or an alkaline earth metal oxide structure or consisting of ZrO2 or alkaline earth metal oxide is less than 10% by weight.
    Type: Grant
    Filed: October 6, 1999
    Date of Patent: July 17, 2001
    Assignee: BASF Aktiengessellschaft
    Inventors: Thomas Narbeshuber, Ulrich Steinbrenner
  • Patent number: 6261990
    Abstract: A composite catalyst includes a first catalyst part containing an Ir catalyst and a second catalyst part covering the first catalyst part and containing a perovskite type composite oxide. The perovskite type composite oxide contributes mainly to oxidation reaction such as NO+O2→NO2 in an atmosphere of excess oxygen while the Ir catalyst contributes mainly to reduction reaction with HC (hydrocarbon) as a reducing agent such as NO2+HC+O2→N2+CO2+H2O.
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: July 17, 2001
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Kazuhide Terada, Ken Ogawa, Takeshi Narishige, Tomomi Sugiyama, Naohiro Satou
  • Publication number: 20010003232
    Abstract: Composite materials of the invention, which include a gas-tight ceramic, a porous metallic support, and an interfacial zone therebetween eliminate the need for mechanical seals between two such dissimilar materials. Oxygen ion-conducting dense ceramic membranes are formed on a porous metallic alloy to provide an interfacial zone identifiable by a gradient of composition in at least one metallic element across the interfacial zone between the dense ceramic membrane and the porous support. Processes using composite materials in accordance with the invention are, for example, used for production of synthesis gas comprising carbon monoxide and molecular hydrogen, whereby the synthesis gas is, advantageously, free of deleterious and/or inert gaseous diluents such as nitrogen.
    Type: Application
    Filed: January 9, 2001
    Publication date: June 14, 2001
    Inventors: Mark S. Kleefisch, Carl A. Udovich, Joseph G. Masin, Thaddeus P. Kobylinski