Patents by Inventor Takeshi Tabata

Takeshi Tabata 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: 8591850
    Abstract: In operating the carbon monoxide removal reactor or the fuel reforming system, there is provided a technique for removing carbon monoxide in a stable manner for an extended period of time. In a method of removing carbon monoxide including an introducing step of introducing a reactant gas including mixture gas and an oxidizer added thereto to a carbon monoxide removal reactor forming in its casing a catalyst layer comprising a carbon monoxide removal catalyst for removing carbon monoxide contained in the mixture gas and an removing step of removing the carbon monoxide by causing the oxidizer to react with the mixture gas on the carbon monoxide removal catalyst, in said introducing step, the reactant gas of 100° C. or lower is introduced to the carbon monoxide removal reactor.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: November 26, 2013
    Assignee: Osaka Gas Co., Ltd.
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Osamu Yamazaki
  • Patent number: 8357341
    Abstract: In operating the carbon monoxide removal reactor or the fuel reforming system, there is provided a technique for removing carbon monoxide in a stable manner for an extended period of time. In a method of removing carbon monoxide including an introducing step of introducing a reactant gas including mixture gas and an oxidizer added thereto to a carbon monoxide removal reactor forming in its casing a catalyst layer comprising a carbon monoxide removal catalyst for removing carbon monoxide contained in the mixture gas and a removing step of removing the carbon monoxide by causing the oxidizer to react with the mixture gas on the carbon monoxide removal catalyst, in said introducing step, the reactant gas of 100° C. or lower is introduced to the carbon monoxide removal reactor.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: January 22, 2013
    Assignee: Osaka Gas Co., Ltd.
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Osamu Yamazaki
  • Publication number: 20110229383
    Abstract: In operating the carbon monoxide removal reactor or the fuel reforming system, there is provided a technique for removing carbon monoxide in a stable manner for an extended period of time. In a method of removing carbon monoxide including an introducing step of introducing a reactant gas including mixture gas and an oxidizer added thereto to a carbon monoxide removal reactor forming in its casing a catalyst layer comprising a carbon monoxide removal catalyst for removing carbon monoxide contained in the mixture gas and a removing step of removing the carbon monoxide by causing the oxidizer to react with the mixture gas on the carbon monoxide removal catalyst, in said introducing step, the reactant gas of 100° C. or lower is introduced to the carbon monoxide removal reactor.
    Type: Application
    Filed: May 31, 2011
    Publication date: September 22, 2011
    Applicant: OSAKA GAS CO., LTD.
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Osamu Yamazaki
  • Patent number: 7972585
    Abstract: In operating the carbon monoxide removal reactor or the fuel reforming system, there is provided a technique for removing carbon monoxide in a stable manner for an extended period of time. In a method of removing carbon monoxide including an introducing step of introducing a reactant gas including mixture gas and an oxidizer added thereto to a carbon monoxide removal reactor forming in its casing a catalyst layer comprising a carbon monoxide removal catalyst for removing carbon monoxide contained in the mixture gas and a removing step of removing the carbon monoxide by causing the oxidizer to react with the mixture gas on the carbon monoxide removal catalyst, in said introducing step, the reactant gas of 100° C. or lower is introduced to the carbon monoxide removal reactor.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: July 5, 2011
    Assignee: Osaka Gas Co., Ltd.
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Osamu Yamazaki
  • Patent number: 7658908
    Abstract: A carbon monoxide removing catalyst such as a ruthenium supporting catalyst is provided for removing, through oxidation thereof, carbon monoxide from an alcohol reformed gas containing hydrogen and carbon monoxide to be supplied to a fuel cell. For its activation, the catalyst is caused to contact an inactive gas or a hydrogen-containing inactive gas consisting of less than 50 volume % of hydrogen gas and the remaining volume of inactive gas, thereby to avoid poisoning of the electrode of the fuel cell with carbon monoxide.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: February 9, 2010
    Assignee: Osaka Gas Co., Ltd.
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Hirokazu Sasaki, Osamu Yamazaki
  • Patent number: 7544634
    Abstract: A carbon monoxide removing catalyst such as a ruthenium supporting catalyst is provided for removing, through oxidation thereof, carbon monoxide from an alcohol reformed gas containing hydrogen and carbon monoxide to be supplied to a fuel cell. For its activation, the catalyst is caused to contact an inactive gas or a hydrogen-containing inactive gas consisting of less than 50 volume % of hydrogen gas and the remaining volume of inactive gas, thereby to avoid poisoning of the electrode of the fuel cell with carbon monoxide.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: June 9, 2009
    Assignee: Osaka Gas Co., Ltd.
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Hirokazu Sasaki, Osamu Yamazaki
  • Patent number: 7544341
    Abstract: A carbon monoxide removing catalyst such as a ruthenium supporting catalyst is provided for removing, through oxidation thereof, carbon monoxide from an alcohol reformed gas containing hydrogen and carbon monoxide to be supplied to a fuel cell. For its activation, the catalyst is caused to contact an inactive gas or a hydrogen-containing inactive gas consisting of less than 50 volume % of hydrogen gas and the remaining volume of inactive gas, thereby to avoid poisoning of the electrode of the fuel cell with carbon monoxide.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: June 9, 2009
    Assignee: Osaka Gas Co., Ltd.
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Hirokazu Sasaki, Osamu Yamazaki
  • Publication number: 20080199380
    Abstract: In operating the carbon monoxide removal reactor or the fuel reforming system, there is provided a technique for removing carbon monoxide in a stable manner for an extended period of time. In a method of removing carbon monoxide including an introducing step of introducing a reactant gas including mixture gas and an oxidizer added thereto to a carbon monoxide removal reactor forming in its casing a catalyst layer comprising a carbon monoxide removal catalyst for removing carbon monoxide contained in the mixture gas and a removing step of removing the carbon monoxide by causing the oxidizer to react with the mixture gas on the carbon monoxide removal catalyst, in said introducing step, the reactant gas of 100° C. or lower is introduced to the carbon monoxide removal reactor.
    Type: Application
    Filed: January 14, 2008
    Publication date: August 21, 2008
    Applicant: OSAKA GAS CO., LTD.
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Osamu Yamazaki
  • Patent number: 7371706
    Abstract: A catalyst for removing hydrocarbons from exhaust gas containing methane and an excess of oxygen, which comprises palladium or palladium/platinum supported on at least one carrier selected from zirconia, sulfated zirconia and tungsten-zirconia, and a method for treating exhaust gas using the catalyst.
    Type: Grant
    Filed: May 4, 2004
    Date of Patent: May 13, 2008
    Assignee: Osaka Gas Company Limited
    Inventors: Hirofumi Ohtsuka, Takeshi Tabata, Takatoshi Nakahira, Masataka Masuda, Takenori Hirano
  • Patent number: 7247592
    Abstract: A carbon monoxide removing catalyst such as a ruthenium supporting catalyst is provided for removing, through oxidation thereof, carbon monoxide from an alcohol reformed gas containing hydrogen and carbon monoxide to be supplied to a fuel cell. For its activation, the catalyst is caused to contact an inactive gas or a hydrogen-containing inactive gas consisting of less than 50 volume % of hydrogen gas and the remaining volume of inactive gas, thereby to avoid poisoning of the electrode of the fuel cell with carbon monoxide.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: July 24, 2007
    Assignee: Osaka Gas Co., Ltd.
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Hirokazu Sasaki, Osamu Yamazaki
  • Publication number: 20070098615
    Abstract: The present invention relates to a carbon-monoxide removing (removal) catalyst for removing mainly carbon monoxide from a gas containing hydrogen (H2) gas as the major component thereof and containing also a small amount of carbon monoxide (CO) gas, such as a reformed gas obtained by reforming (steam reforming, partial oxidation reforming, etc.) a hydrocarbon such as a natural gas, naphtha, kerosene or the like and an alcohol such as methanol.
    Type: Application
    Filed: August 24, 2006
    Publication date: May 3, 2007
    Applicant: OSAKA GAS CO., LTD.
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Hirokazu Sasaki, Osamu Yamazaki
  • Publication number: 20070078054
    Abstract: A carbon monoxide removing catalyst such as a ruthenium supporting catalyst is provided for removing, through oxidation thereof, carbon monoxide from an alcohol reformed gas containing hydrogen and carbon monoxide to be supplied to a fuel cell. For its activation, the catalyst is caused to contact an inactive gas or a hydrogen-containing inactive gas consisting of less than 50 volume % of hydrogen gas and the remaining volume of inactive gas, thereby to avoid poisoning of the electrode of the fuel cell with carbon monoxide.
    Type: Application
    Filed: August 24, 2006
    Publication date: April 5, 2007
    Applicant: OSAKA GAS CO., LTD.
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Hirokazu Sasaki, Osamu Yamazaki
  • Publication number: 20070048562
    Abstract: A carbon monoxide removing catalyst such as a ruthenium supporting catalyst is provided for removing, through oxidation thereof, carbon monoxide from an alcohol reformed gas containing hydrogen and carbon monoxide to be supplied to a fuel cell. For its activation, the catalyst is caused to contact an inactive gas or a hydrogen-containing inactive gas consisting of less than 50 volume % of hydrogen gas and the remaining volume of inactive gas, thereby to avoid poisoning of the electrode of the fuel cell with carbon monoxide.
    Type: Application
    Filed: August 24, 2006
    Publication date: March 1, 2007
    Applicant: OSAKA GAS CO., LTD.
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Hirokazu Sasaki, Osamu Yamazaki
  • Patent number: 6887446
    Abstract: A catalyst for removing hydrocarbons from exhaust gas containing methane and an excess of oxygen, which comprises palladium or palladium/platinum supported on at least one carrier selected from zirconia, sulfated zirconia and tungsten-zirconia, and a method for treating exhaust gas using the catalyst.
    Type: Grant
    Filed: June 12, 2003
    Date of Patent: May 3, 2005
    Assignee: Osaka Gas Company Limited
    Inventors: Hirofumi Ohtsuka, Takeshi Tabata, Takatoshi Nakahira, Masataka Masuda, Takenori Hirano
  • Publication number: 20050002839
    Abstract: A catalyst for removing hydrocarbons from exhaust gas containing methane and an excess of oxygen, which comprises palladium or palladium/platinum supported on at least one carrier selected from zirconia, sulfated zirconia and tungsten-zirconia, and a method for treating exhaust gas using the catalyst.
    Type: Application
    Filed: July 22, 2004
    Publication date: January 6, 2005
    Inventors: Hirofumi Ohtsuka, Takeshi Tabata, Takatoshi Nakahira, Masataka Masuda, Takenori Hirano
  • Publication number: 20040235654
    Abstract: A catalyst for removing hydrocarbons from exhaust gas containing methane and an excess of oxygen, which comprises palladium or palladium/platinum supported on at least one carrier selected from zirconia, sulfated zirconia and tungsten-zirconia, and a method for treating exhaust gas using the catalyst.
    Type: Application
    Filed: May 4, 2004
    Publication date: November 25, 2004
    Applicant: OSAKA GAS COMPANY LIMITED
    Inventors: Hirofumi Ohtsuka, Takeshi Tabata, Takatoshi Nakahira, Masataka Masuda, Takenori Hirano
  • Publication number: 20040096384
    Abstract: In operating the carbon monoxide removal reactor or the fuel reforming system, there is provided a technique for removing carbon monoxide in a stable manner for an extended period of time.
    Type: Application
    Filed: September 26, 2003
    Publication date: May 20, 2004
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Osamu Yamazaki
  • Publication number: 20040038093
    Abstract: A carbon monoxide removing catalyst such as a ruthenium supporting catalyst is provided for removing, through oxidation thereof, carbon monoxide from an alcohol reformed gas containing hydrogen and carbon monoxide to be supplied to a fuel cell. For its activation, the catalyst is caused to contact an inactive gas or a hydrogen-containing inactive gas consisting of less than 50 volume % of hydrogen gas and the remaining volume of inactive gas, thereby to avoid poisoning of the electrode of the fuel cell with carbon monoxide.
    Type: Application
    Filed: March 18, 2003
    Publication date: February 26, 2004
    Inventors: Mitsuaki Echigo, Takeshi Tabata, Hirokazu Sasaki, Osamu Yamazaki
  • Publication number: 20040013592
    Abstract: A catalyst for removing hydrocarbons from exhaust gas containing methane and an excess of oxygen, which comprises palladium or palladium/platinum supported on at least one carrier selected from zirconia, sulfated zirconia and tungsten-zirconia, and a method for treating exhaust gas using the catalyst.
    Type: Application
    Filed: June 12, 2003
    Publication date: January 22, 2004
    Applicant: Osaka Gas Company Limited
    Inventors: Hirofumi Ohtsuka, Takeshi Tabata, Takatoshi Nakahira, Masataka Masuda, Takenori Hirano
  • Patent number: 6602481
    Abstract: A catalyst for removing hydrocarbons from exhaust gas containing methane and an excess of oxygen, which comprises palladium or palladium/platinum supported on at least one carrier selected from zirconia, sulfated zirconia and tungsten-zirconia, and a method for treating exhaust gas using the catalyst.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: August 5, 2003
    Assignee: Osaka Gas Company Limited
    Inventors: Hirofumi Ohtsuka, Takeshi Tabata, Takatoshi Nakahira, Masataka Masuda, Takenori Hirano