Patents by Inventor S. Elangovan

S. Elangovan 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).

  • Publication number: 20140157669
    Abstract: A method of forming a synthesis gas utilizing a reformer is disclosed. The method utilizes a reformer that includes a plasma zone to receive a pre-heated mixture of reactants and ionize the reactants by applying an electrical potential thereto. A first thermally conductive surface surrounds the plasma zone and is configured to transfer heat from an external heat source into the plasma zone. The reformer further includes a reaction zone to chemically transform the ionized reactants into synthesis gas comprising hydrogen and carbon monoxide. A second thermally conductive surface surrounds the reaction zone and is configured to transfer heat from the external heat source into the reaction zone. The first thermally conductive surface and second thermally conductive surface are both directly exposed to the external heat source. A corresponding apparatus and system are also disclosed herein.
    Type: Application
    Filed: December 11, 2012
    Publication date: June 12, 2014
    Inventors: Joseph J. Hartvigsen, S. Elangovan, Piotr Czernichowski, Michele Hollist
  • Patent number: 8460409
    Abstract: A reformer is disclosed that includes a plasma zone to receive a pre-heated mixture of reactants and ionize the reactants by applying an electrical potential thereto. A first thermally conductive surface surrounds the plasma zone and is configured to transfer heat from an external heat source into the plasma zone. The reformer further includes a reaction zone to chemically transform the ionized reactants into synthesis gas comprising hydrogen and carbon monoxide. A second thermally conductive surface surrounds the reaction zone and is configured to transfer heat from the external heat source into the reaction zone. The first thermally conductive surface and second thermally conductive surface are both directly exposed to the external heat source. A corresponding method and system are also disclosed and claimed herein.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: June 11, 2013
    Assignee: Ceramatec, Inc.
    Inventors: Joseph J. Hartvigsen, S. Elangovan, Piotr Czernichowski, Michele Hollist
  • Patent number: 8354011
    Abstract: An electrolyzer cell is disclosed which includes a cathode to reduce an oxygen-containing molecule, such as H2O, CO2, or a combination thereof, to produce an oxygen ion and a fuel molecule, such as H2, CO, or a combination thereof. An electrolyte is coupled to the cathode to transport the oxygen ion to an anode. The anode is coupled to the electrolyte to receive the oxygen ion and produce oxygen gas therewith. In one embodiment, the anode may be fabricated to include an electron-conducting phase having a perovskite crystalline structure or structure similar thereto. This perovskite may have a chemical formula of substantially (Pr(1-x)Lax)(z-y)A?yBO(3-?), wherein 0<x<1, 0?y?0.5, and 0.8?z?1.1. In another embodiment, the cathode includes an electron-conducting phase that contains nickel oxide intermixed with magnesium oxide.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: January 15, 2013
    Assignee: Ceramatec, Inc.
    Inventors: S. Elangovan, Joseph J. Hartvigsen, Feng Zhao
  • Patent number: 8350190
    Abstract: A ceramic electrode for a gliding electric arc system. The ceramic electrode includes a ceramic fin defining a spine, a heel, and a tip. A discharge edge of the ceramic fin defines a diverging profile approximately from the heel of the ceramic fin to the tip of the ceramic fin. A mounting surface coupled to the ceramic fin facilitates mounting the ceramic fin within the gliding electric arc system. One or more ceramic electrodes may be used in the gliding electric arc system or other systems which at least partially oxidize a combustible material.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: January 8, 2013
    Assignee: Ceramatec, Inc.
    Inventors: Joseph J. Hartvigsen, Michele Hollist, S. Elangovan, Piotr Czernichowski, Merrill Wilson
  • Publication number: 20120267996
    Abstract: A ceramic electrode for a gliding electric arc system. The ceramic electrode includes a ceramic fin defining a spine, a heel, and a tip. A discharge edge of the ceramic fin defines a diverging profile approximately from the heel of the ceramic fin to the tip of the ceramic fin. A mounting surface coupled to the ceramic fin facilitates mounting the ceramic fin within the gliding electric arc system. One or more ceramic electrodes may be used in the gliding electric arc system or other systems which at least partially oxidize a combustible material.
    Type: Application
    Filed: February 22, 2008
    Publication date: October 25, 2012
    Inventors: Joseph J. Hartvigsen, Michele Hollist, S. Elangovan, Piotr Czernichowski, Merrill Wilson
  • Publication number: 20120118862
    Abstract: A method and apparatus for oxidizing a combustible material. The method includes introducing a volume of the combustible material into a plasma zone of a gliding electric arc oxidation system. The method also includes introducing a volume of oxidizer into the plasma zone of the gliding electric arc oxidation system. The volume of oxidizer includes a stoichiometrically excessive amount of oxygen. The method also includes generating an electrical discharge between electrodes within the plasma zone of the gliding electric arc oxidation system to oxidize the combustible material.
    Type: Application
    Filed: July 12, 2007
    Publication date: May 17, 2012
    Inventors: Joseph J. Hartvigsen, S. Elangovan
  • Publication number: 20120048730
    Abstract: A method is provided for synthesizing synthesis gas from carbon dioxide obtained from atmospheric air or other available carbon dioxide source and water using a sodium-conducting electrochemical cell. Synthesis gas is also produced by the coelectrolysis of carbon dioxide and steam in a solid oxide fuel cell or solid oxide electrolytic cell. The synthesis gas produced may then be further processed and eventually converted into a liquid fuel suitable for transportation or other applications.
    Type: Application
    Filed: November 1, 2011
    Publication date: March 1, 2012
    Inventors: Joseph J. Hartvigsen, Ashok V. Joshi, S. Elangovan, Shekar Balagopal, John Howard Gordon, Michele Hollist
  • Publication number: 20120043219
    Abstract: A process is provided for synthesizing synthesis gas from carbon dioxide obtained from atmospheric air or other available carbon dioxide source and water using a sodium-conducting electrochemical cell. Synthesis gas is also produced by the coelectrolysis of carbon dioxide and steam in a solid oxide fuel cell or solid oxide electrolytic cell. The synthesis gas produced may then be further processed and eventually converted into a liquid fuel suitable for transportation or other applications.
    Type: Application
    Filed: November 1, 2011
    Publication date: February 23, 2012
    Inventors: Joseph J. Hartvigsen, Ashok V. Joshi, S. Elangovan, Shekar Balagopal, John Howard Gordon, Michele Hollist
  • Patent number: 8075746
    Abstract: A method is provided for synthesizing synthesis gas from carbon dioxide obtained from atmospheric air or other available carbon dioxide source and water using a sodium-conducting electrochemical cell. Synthesis gas is also produced by the coelectrolysis of carbon dioxide and steam in a solid oxide fuel cell or solid oxide electrolytic cell. The synthesis gas produced may then be further processed and eventually converted into a liquid fuel suitable for transportation or other applications.
    Type: Grant
    Filed: August 25, 2006
    Date of Patent: December 13, 2011
    Assignee: Ceramatec, Inc.
    Inventors: Joseph J. Hartvigsen, Ashok V. Joshi, S. Elangovan, Shekar Balagopal, John Howard Gordon, Michele Hollist
  • Patent number: 8012380
    Abstract: A multi-phase proton conducting material comprising a proton-conducting ceramic phase and a stabilizing ceramic phase. Under the presence of a partial pressure gradient of hydrogen across the membrane or under the influence of an electrical potential, a membrane fabricated with this material selectively transports hydrogen ions through the proton conducting phase, which results in ultrahigh purity hydrogen permeation through the membrane. The stabilizing ceramic phase may be substantially structurally and chemically identical to at least one product of a reaction between the proton conducting phase and at least one expected gas under operating conditions of a membrane fabricated using the material. In a barium cerate-based proton conducting membrane, one stabilizing phase is ceria.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: September 6, 2011
    Assignee: Ceramatec, Inc.
    Inventors: S. Elangovan, Balakrishnan G. Nair, Troy Small, Brian Heck
  • Publication number: 20110062017
    Abstract: An electrolyzer cell is disclosed which includes a cathode to reduce an oxygen-containing molecule, such as H2O, CO2, or a combination thereof, to produce an oxygen ion and a fuel molecule, such as H2, CO, or a combination thereof. An electrolyte is coupled to the cathode to transport the oxygen ion to an anode. The anode is coupled to the electrolyte to receive the oxygen ion and produce oxygen gas therewith. In one embodiment, the anode may be fabricated to include an electron-conducting phase having a perovskite crystalline structure or structure similar thereto. This perovskite may have a chemical formula of substantially (Pr(1-x)Lax)(z-y)A?yBO(3-?), wherein 0<x<1, 0?y?0.5, and 0.8 ?z?1.1. In another embodiment, the cathode includes an electron-conducting phase that contains nickel oxide intermixed with magnesium oxide.
    Type: Application
    Filed: November 19, 2010
    Publication date: March 17, 2011
    Inventors: S. Elangovan, Joseph J. Hartvigsen
  • Publication number: 20100279194
    Abstract: A solid oxide fuel cell (SOFC) for use in generating electricity while tolerating sulfur content in a fuel input stream. The solid oxide fuel cell includes an electrolyte, a cathode, and a sulfur tolerant anode. The cathode is disposed on a first side of the electrolyte. The sulfur tolerant anode is disposed on a second side of the electrolyte opposite the cathode. The sulfur tolerant anode includes a composition of nickel, copper, and ceria to exhibit a substantially stable operating voltage at a constant current density in the presence of the sulfur content within the fuel input stream. The solid oxide fuel cell is useful within a SOFC stack to generate electricity from reformate which includes synthesis gas (syngas) and sulfur content. The solid oxide fuel cell is also useful within a SOFC stack to generate electricity from unreformed hydrocarbon fuel.
    Type: Application
    Filed: September 29, 2008
    Publication date: November 4, 2010
    Inventors: S. Elangovan, Joseph J. Hartvigsen
  • Publication number: 20100003556
    Abstract: A reformer is disclosed that includes a plasma zone to receive a pre-heated mixture of reactants and ionize the reactants by applying an electrical potential thereto. A first thermally conductive surface surrounds the plasma zone and is configured to transfer heat from an external heat source into the plasma zone. The reformer further includes a reaction zone to chemically transform the ionized reactants into synthesis gas comprising hydrogen and carbon monoxide. A second thermally conductive surface surrounds the reaction zone and is configured to transfer heat from the external heat source into the reaction zone. The first thermally conductive surface and second thermally conductive surface are both directly exposed to the external heat source. A corresponding method and system are also disclosed and claimed herein.
    Type: Application
    Filed: August 7, 2009
    Publication date: January 7, 2010
    Inventors: Joseph J. Hartvigsen, S. Elangovan, Piotr Czemichowski, Michele Hollist
  • Publication number: 20090181274
    Abstract: An electrochemical cell is disclosed in one embodiment of the invention as including an oxygen electrode and a solid oxide electrolyte coupled to the oxygen electrode to transport oxygen ions. A hydrogen electrode is coupled to the solid oxide electrolyte and contains nickel combined with a material tending to reduce the reactivity of the nickel with the solid oxide electrolyte. In selected embodiments, the solid oxide electrolyte is lanthanum gallate. Similarly, the material combined with the nickel may be an oxide such as magnesium oxide.
    Type: Application
    Filed: December 11, 2007
    Publication date: July 16, 2009
    Inventors: S. Elangovan, Joseph J. Hartvigsen
  • Publication number: 20090090637
    Abstract: A method for increasing the reliability of an electrolyzer cell stack includes providing multiple electrolyzer cell stacks. Each electrolyzer cell stack includes multiple cells separated by electrically conductive interconnects. The method may further include generating, using an external power source, an electrical current through each of the electrolyzer cell stacks to produce a fuel. The method may further include electrically connecting an interconnect of a first electrolyzer cell stack to an interconnect of a second electrolyzer cell stack located at a substantially equivalent electrical potential. This allows current to flow from one electrolyzer cell stack to another in the event a cell fails or creates a point of high resistance.
    Type: Application
    Filed: October 4, 2007
    Publication date: April 9, 2009
    Inventors: Joseph J. Hartvigsen, S. Elangovan, Lyman Frost
  • Publication number: 20090056604
    Abstract: A method and apparatus for incinerating a medical waste material. The method includes introducing a volume of the medical waste material into a plasma zone of a non-thermal plasma generator. The method also includes introducing a volume of oxidizer into the plasma zone of the non-thermal plasma generator. The method also includes generating an electrical discharge between electrodes within the plasma zone of the non-thermal plasma generator to incinerate the medical waste material.
    Type: Application
    Filed: July 13, 2007
    Publication date: March 5, 2009
    Inventors: Joseph J. Hartvigsen, Michele Hollist, S. Elangovan, Piotr Czernichowski
  • Publication number: 20080029388
    Abstract: An electrolyzer cell is disclosed which includes a cathode to reduce an oxygen-containing molecule, such as H2O, CO2, or a combination thereof, to produce an oxygen ion and a fuel molecule, such as H2, CO, or a combination thereof. An electrolyte is coupled to the cathode to transport the oxygen ion to an anode. The anode is coupled to the electrolyte to receive the oxygen ion and produce oxygen gas therewith. In one embodiment, the anode may be fabricated to include an electron-conducting phase having a perovskite crystalline structure or structure similar thereto. This perovskite may have a chemical formula of substantially (Pr(1-x)Lax)(z-y)A?yBO(3-?), wherein 0?x?0.5, 0?y?0.5, and 0.8?z?1.1. In another embodiment, the cathode includes an electron-conducting phase that contains nickel oxide intermixed with magnesium oxide.
    Type: Application
    Filed: July 23, 2007
    Publication date: February 7, 2008
    Inventors: S. Elangovan, Joseph Hartvigsen
  • Publication number: 20080032140
    Abstract: A multi-phase proton conducting material comprising a proton-conducting ceramic phase and a stabilizing ceramic phase. Under the presence of a partial pressure gradient of hydrogen across the membrane or under the influence of an electrical potential, a membrane fabricated with this material selectively transports hydrogen ions through the proton conducting phase, which results in ultrahigh purity hydrogen permeation through the membrane. The stabilizing ceramic phase may be substantially structurally and chemically identical to at least one product of a reaction between the proton conducting phase and at least one expected gas under operating conditions of a membrane fabricated using the material. In a barium cerate-based proton conducting membrane, one stabilizing phase is ceria.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 7, 2008
    Inventors: S. Elangovan, Balakrishnan Nair, Troy Small, Brian Heck
  • Publication number: 20070045125
    Abstract: A method is provided for synthesizing synthesis gas from carbon dioxide obtained from atmospheric air or other available carbon dioxide source and water using a sodium-conducting electrochemical cell. Synthesis gas is also produced by the coelectrolysis of carbon dioxide and steam in a solid oxide fuel cell or solid oxide electrolytic cell. The synthesis gas produced may then be further processed and eventually converted into a liquid fuel suitable for transportation or other applications.
    Type: Application
    Filed: August 25, 2006
    Publication date: March 1, 2007
    Inventors: Joseph Hartvigsen, Ashok Joshi, S. Elangovan, Shekar Balagopal, John Gordon, Michele Hollist
  • Patent number: 5614127
    Abstract: An improved ceramic interconnect component for a solid oxide fuel cell having good electrical conductivity thermodynamic stability in the presence of fuel and a coefficient of thermal expansion matching closely that of zirconia electrolytes is disclosed. The interconnect is a lanthanum strontium chromate material containing minor quantities of calcia, and iron and, optionally, very minor quantities of cobalt, as dopants.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: March 25, 1997
    Assignee: Gas Research Institute
    Inventors: Ashok C. Khandkar, Christopher E. Milliken, S. Elangovan