Patents by Inventor Takahiro Kasuh

Takahiro Kasuh 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: 7655204
    Abstract: This invention relates to a technique for removing nitrogen oxides (NOx) present in exhaust gases discharged from boilers and the like. When the temperature of the exhaust gas is 100° C. or below, a heat-treated active carbon produced by heat-treating a raw active carbon at 600 to 1,200° C. in a non-oxidizing atmosphere so as to remove oxygen-containing functional groups present at the surfaces thereof and thereby reduce the atomic surface oxygen/surface carbon ratio to 0.05 or less is preferably used. When the temperature of the exhaust gas exceeds 100° C., a heat-treated active carbon produced by heat-treating a raw active carbon at 600 to 1,200° C. in a non-oxidizing atmosphere and activating the surfaces thereof with sulfuric acid or nitric acid to impart oxidizing oxygen-containing functional groups thereto is preferably used.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: February 2, 2010
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Isao Mochida, Akinori Yasutake, Toshihiko Setoguchi, Norihisa Kobayashi, Takahiro Kasuh, Masaaki Yoshikawa
  • Publication number: 20090081097
    Abstract: This invention relates to a technique for removing nitrogen oxides (NOx) present in exhaust gases discharged from boilers and the like. When the temperature of the exhaust gas is 100° C. or below, a heat-treated active carbon produced by heat-treating a raw active carbon at 600 to 1,200° C. in a non-oxidizing atmosphere so as to remove oxygen-containing functional groups present at the surfaces thereof and thereby reduce the atomic surface oxygen/surface carbon ratio to 0.05 or less is preferably used. When the temperature of the exhaust gas exceeds 100° C., a heat-treated active carbon produced by heat-treating a raw active carbon at 600 to 1,200° C. in a non-oxidizing atmosphere and activating the surfaces thereof with sulfuric acid or nitric acid to impart oxidizing oxygen-containing functional groups thereto is preferably used.
    Type: Application
    Filed: November 14, 2008
    Publication date: March 26, 2009
    Inventors: Isao Mochida, Akinori Yasutake, Toshihiko Setoguchi, Norihisa Kobayashi, Takahiro Kasuh, Masaaki Yoshikawa
  • Patent number: 7465429
    Abstract: This invention relates to a technique for removing nitrogen oxides (NOx) present in exhaust gases discharged from boilers and the like. When the temperature of the exhaust gas is 100° C. or below, a heat-treated active carbon produced by heat-treating a raw active carbon at 600 to 1,200° C. in a non-oxidizing atmosphere so as to remove oxygen-containing functional groups present at the surfaces thereof and thereby reduce the atomic surface oxygen/surface carbon ratio to 0.05 or less is preferably used. When the temperature of the exhaust gas exceeds 100° C., a heat-treated active carbon produced by heat-treating a raw active carbon at 600. to 1,200° C. in a non-oxidizing atmosphere and activating the surfaces thereof with sulfuric acid or nitric acid to impart oxidizing oxygen-containing functional groups thereto is preferably used.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: December 16, 2008
    Assignees: Osaka Gas Company Limited, Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Isao Mochida, Akinori Yasutake, Toshihiko Setoguchi, Norihisa Kobayashi, Takahiro Kasuh, Masaaki Yoshikawa
  • Patent number: 6814948
    Abstract: An active carbon for use in the treatment of exhaust gas can be obtained by heat-treating a starting active carbon fiber derived from polyacrylonitrile, pitch or the like or a starting particulate active carbon in a non-oxidizing atmosphere. The heat-treating temperature is preferably in the range of 600 to 1,200 ° C. for use in the desulfurization of exhaust gas, and in range of 600 to 1,000° C. for use in the denitration of exhaust gas. By using the resulting heat-treated active carbon for the purpose of desulfurization, the sulfur oxide concentration in exhaust gas can be reduced to 5 ppm or below. Moreover, by using the heat-treated active carbon in combination with conventional denitration based on selective catalytic reduction, the nitrogen oxide concentration in exhaust gas can be reduced to 1 ppm or below.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: November 9, 2004
    Assignees: Mitsubishi Jukogyo Kabushiki Kaisha, Osaka Gas Company Limited
    Inventors: Akinori Yasutake, Toshihiko Setoguchi, Norihisa Kobayashi, Takahiro Kasuh, Masaaki Yoshikawa, Isao Mochida
  • Publication number: 20020132735
    Abstract: This invention relates to a technique for removing nitrogen oxides (NOx) present in exhaust gases discharged from boilers and the like. When the temperature of the exhaust gas is 100° C. or below, a heat-treated active carbon produced by heat-treating a raw active carbon at 600 to 1,200° C. in a non-oxidizing atmosphere so as to remove oxygen-containing functional groups present at the surfaces thereof and thereby reduce the atomic surface oxygen/surface carbon ratio to 0.05 or less is preferably used. When the temperature of the exhaust gas exceeds 100° C., a heat-treated active carbon produced by heat-treating a raw active carbon at 600. to 1,200° C. in a non-oxidizing atmosphere and activating the surfaces thereof with sulfuric acid or nitric acid to impart oxidizing oxygen-containing functional groups thereto is preferably used.
    Type: Application
    Filed: February 25, 2002
    Publication date: September 19, 2002
    Applicant: OSAKA GAS COMPANY LIMITED
    Inventors: Isao Mochida, Akinori Yasutake, Toshihiko Setoguchi, Norihisa Kobayashi, Takahiro Kasuh, Masaaki Yoshikawa
  • Patent number: 6383463
    Abstract: A process for the denitration of combustion exhaust gas from combustion equipment by passing the exhaust gas through an ammonia reduction denitrator, comprises providing a bypass having a low-temperature denitrator installed therein; while the temperature of the exhaust gas is not high enough to allow the ammonia reduction denitrator to function properly, as encountered immediately after starting the combustion equipment, passing the exhaust gas through the bypass to perform the denitration thereof by means of the low-temperature denitrator; when the ammonia reduction denitrator has come to function properly, closing the bypass to perform the denitration of the exhaust gas by means of the ammonia reduction denitrator; and regenerating a catalyst within said low-temperature denitrator while the by-pass is closed.
    Type: Grant
    Filed: January 7, 1999
    Date of Patent: May 7, 2002
    Assignees: Mitsubishi Heavy Industries, Ltd., Osaka Gas Company Limited
    Inventors: Isao Mochida, Akinori Yasutake, Toshihiko Setoguchi, Norihisa Kobayashi, Hitoshi Nakamura, Takahiro Kasuh, Masaaki Yoshikawa
  • Patent number: 6156432
    Abstract: In accordance with the present invention, lithium secondary batteries excellent in charge/discharge characteristics, in particular in charge/discharge capacity and initial efficiency, and high in safety can be provided.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: December 5, 2000
    Assignee: Osaka Gas Company Limited
    Inventors: Akihiro Mabuchi, Hiroyuki Fujimoto, Takahiro Kasuh, Katsuhisa Tokumitsu
  • Patent number: 6127312
    Abstract: This invention relates to a technique for removing nitrogen oxides (NO.sub.x) present in exhaust gases discharged from boilers and the like. When the temperature of the exhaust gas is 100.degree. C. or below, a heat-treated active carbon produced by heat-treating a raw active carbon at 600 to 1,200.degree. C. in a non-oxidizing atmosphere so as to remove oxygen-containing functional groups present at the surfaces thereof and thereby reduce the atomic surface oxygen/surface carbon ratio to 0.05 or less is preferably used. When the temperature of the exhaust gas exceeds 100.degree. C., a heat-treated active carbon produced by heat-treating a raw active carbon at 600 to 1,200.degree. C. in a non-oxidizing atmosphere and activating the surfaces thereof with sulfuric acid or nitric acid to impart oxidizing oxygen-containing functional groups thereto is preferably used.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: October 3, 2000
    Assignee: Osaka Gas Company Ltd.
    Inventors: Isao Mochida, Akinori Yasutake, Toshihiko Setoguchi, Norihisa Kobayashi, Takahiro Kasuh, Masaaki Yoshikawa
  • Patent number: 6106791
    Abstract: An active carbon for use in the treatment of exhaust gas can be obtained by heat-treating a starting active carbon fiber derived from polyacrylonitrile, pitch or the like or a starting particulate active carbon in a non-oxidizing atmosphere. The heat-treating temperature is preferably in the range of 600 to 1,200.degree. C. for use in the desulfurization of exhaust gas, and in range of 600 to 1,000.degree. C. for use in the denitration of exhaust gas. By using the resulting heat-treated active carbon for the purpose of desulfurization, the sulfur oxide concentration in exhaust gas can be reduced to 5 ppm or below. Moreover, by using the heat-treated active carbon in combination with conventional denitration based on selective catalytic reduction, the nitrogen oxide concentration in exhaust gas can be reduced to 1 ppm or below.
    Type: Grant
    Filed: December 24, 1998
    Date of Patent: August 22, 2000
    Assignees: Mitsubishi Jukogyo Kabushiki Kaisha, Osaka Gas Company Limited
    Inventors: Isao Mochida, Akinori Yasutake, Toshihiko Setoguchi, Norihisa Kobayashi, Takahiro Kasuh, Masaaki Yoshikawa