Patents by Inventor Gopala Krishnan

Gopala Krishnan 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: 8709370
    Abstract: The present invention relates generally to production of a fluoride gas and equivalents thereof, and fluorine-doped sodium silicate glass, glass ceramics, vitro ceramics and equivalents thereof. In one embodiment, the method includes providing a salt and an oxide in a reactor, heating the reactor to produce a vapor and the vitro ceramic and removing the vapor.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: April 29, 2014
    Assignee: SRI International
    Inventors: Angel Sanjurjo, Kai-Hung Lau, Xiaobing Xie, Gopala Krishnan
  • Patent number: 8465809
    Abstract: A moving bed reactor system is provided. The system comprises at least one gas inlet, a distributor, a temperature control, a plurality of electrodes, and a spark control circuit. The spark control circuit drives the electrodes and generates a multi-arc discharge when the system is loaded with particles and a gas at approximately atmospheric pressure or greater is being pumped through the system. The multi-arc discharge is useful to create activated species which may improve the rate of a chemical reaction taking place in the moving bed reactor system.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: June 18, 2013
    Assignee: SRI International
    Inventors: Angel Sanjurjo, Kazunori Matsumoto, Carles Colominas, Gopala Krishnan, Palitha Jayaweera, Kai-Hung Lau
  • Patent number: 8168149
    Abstract: A method and system for CO2 capture from flue gas uses an absorber vessel in which a flue gas stream containing CO2 is contacted with an ammoniated solution to remove CO2 from the flue gas, and a regenerator vessel in which CO2 is released from the ammoniated solution. Parasitic energy consumption of the system can be reduced by adding to the ammoniated solution a promoter effective to enhance the formation of ammonium bicarbonate within the ammoniated solution. The amount of ammoniated solution recycled from the regenerator vessel to the absorber vessel is less than that which would be required using the ammoniated solution without the promoter for removal of the same amount of CO2 from the flue gas.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: May 1, 2012
    Assignee: ALSTOM Technology Ltd
    Inventors: Eli Gal, Otto Morten Bade, Indira Jayaweera, Gopala Krishnan
  • Publication number: 20110070136
    Abstract: A method and system for CO2 capture from flue gas uses an absorber vessel in which a flue gas stream containing CO2 is contacted with an ammoniated solution to remove CO2 from the flue gas, and a regenerator vessel in which CO2 is released from the ammoniated solution. Parasitic energy consumption of the system can be reduced by adding to the ammoniated solution a promoter effective to enhance the formation of ammonium bicarbonate within the ammoniated solution. The amount of ammoniated solution recycled from the regenerator vessel to the absorber vessel is less than that which would be required using the ammoniated solution without the promoter for removal of the same amount of CO2 from the flue gas.
    Type: Application
    Filed: December 2, 2010
    Publication date: March 24, 2011
    Applicant: ALSTOM Technology Ltd
    Inventors: Eli Gal, Otto Morten Bade, Indira Jayaweera, Gopala Krishnan
  • Patent number: 7862788
    Abstract: A chilled ammonia based CO2 capture system and method is provided. A promoter is used to help accelerate certain capture reactions that occur substantially coincident to and/or as a result of contacting a chilled ammonia based ionic solution with a gas stream that contains CO2.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: January 4, 2011
    Assignee: ALSTOM Technology Ltd
    Inventors: Eli Gal, Otto Morten Bade, Indira Jayaweera, Gopala Krishnan
  • Publication number: 20100056353
    Abstract: The present invention relates generally to production of a fluoride gas and equivalents thereof, and fluorine-doped sodium silicate glass, glass ceramics, vitro ceramics and equivalents thereof. In one embodiment, the method includes providing a salt and an oxide in a reactor, heating the reactor to produce a vapor and the vitro ceramic and removing the vapor.
    Type: Application
    Filed: August 27, 2009
    Publication date: March 4, 2010
    Inventors: Angel Sanjurjo, Kai-Hung Lau, Xiaobing Xie, Gopala Krishnan
  • Publication number: 20090291235
    Abstract: A moving bed reactor system is provided. The system comprises at least one gas inlet, a distributor, a temperature control, a plurality of electrodes, and a spark control circuit. The spark control circuit drives the electrodes and generates a multi-arc discharge when the system is loaded with particles and a gas at approximately atmospheric pressure or greater is being pumped through the system. The multi-arc discharge is useful to create activated species which may improve the rate of a chemical reaction taking place in the moving bed reactor system.
    Type: Application
    Filed: May 4, 2007
    Publication date: November 26, 2009
    Inventors: Angel Sanjurjo, Kazunori Matsumoto, Carles Colominas, Gopala Krishnan, Palitha Jayaweera, Kai-Hung Lau
  • Publication number: 20090148930
    Abstract: A chilled ammonia based CO2 capture system and method is provided. A promoter is used to help accelerate certain capture reactions that occur substantially coincident to and/or as a result of contacting a chilled ammonia based ionic solution with a gas stream that contains CO2.
    Type: Application
    Filed: November 18, 2008
    Publication date: June 11, 2009
    Applicant: ALSTOM Technology Ltd
    Inventors: Eli Gal, Otto Morten Bade, Indira Jayaweera, Gopala Krishnan
  • Publication number: 20050097991
    Abstract: Methods and apparatuses for producing a solid metallic composition by reacting a gaseous metal halide with a reducing agent are described. The method generally includes reacting a gaseous metal halide with a reducing agent in a manner effective to form a nonsolid reaction product, wherein the metal halide has the formula MXi, in which M is a metal selected from a transition metal of the periodic table, aluminum, silicon, boron, and combinations thereof, X is a halogen, i is greater than 0, and the reducing agent is a gaseous reducing agent selected from hydrogen and a compound that releases hydrogen, and combinations thereof; and solidifying the reaction product, thereby forming a metallic composition comprising M that is substantially free from halides.
    Type: Application
    Filed: August 6, 2004
    Publication date: May 12, 2005
    Inventors: Angel Sanjurjo, Eugene Thiers, Kai-Hung Lau, Don Hildenbrand, Gopala Krishnan, Esperanza Alvarez
  • Patent number: 4886652
    Abstract: Production of carbide shapes of silicon, titanium or vanadium by reaction of carbon with the metal in liquid phase such being carried out by heating a mixture of particles of carbon and particles of the metal rapidly to the melting point of the metal, thereby minimizing solid state reaction, and holding at a temperature and for a time sufficient to cause reaction. The metal and carbon particles are about 0.05 to 10 mm in diameter. An organic binder is used which volatilizes or dissociates upon heating.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: December 12, 1989
    Assignee: Osaka Gas Co., Ltd.
    Inventors: Gopala Krishnan, Michael Gusman, Sylvia M. Johnson, David J. Rowcliffe, Hajime Nakano