Patents by Inventor Katsutoshi Nagaoka
Katsutoshi Nagaoka 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: 20240116770Abstract: A metal-supported material including a transition metal excluding Group 4 elements supported on a binary composite oxide. The composite oxide includes a metal element expressed by AnXy, where A represents a lanthanoid that is in a partially or entirely trivalent state, X represents an element that is a Group-2 element in a periodic table selected from the group consisting of Ca, Sr, and Ba, or a lanthanoid, and that is different from A, n satisfies 0<n<1, y satisfies 0<y<1, m satisfies 0?m<1, and n+y=1. The composite oxide includes a solid solution that is a tetragonal crystal or a cubic crystal, and a ratio of a value (Dads) of a dispersion degree of the transition metal obtained by an H2 pulse chemical adsorption method to a value (DTEM) of the dispersion degree predicted from an average particle diameter of particles of the transition metal obtained from a TEM image satisfies 0<Dads/DTEM<1.Type: ApplicationFiled: December 1, 2023Publication date: April 11, 2024Inventors: Katsutoshi Nagaoka, Yuta Ogura, Katsutoshi Sato
-
Patent number: 11866342Abstract: A composite having a composition expressed by AnXyMm wherein, A represents a lanthanoid that is in a trivalent state at least partially or entirely, X represents an element that is a Group-2 element in the periodic table selected from the group consisting of Ca, Sr, and Ba, or a lanthanoid that is different from A, M represents an element that is a Group-1 element in the periodic table, a Group-2 element selected from the group consisting of Ca, Sr, and Ba, or a lanthanoid that is different from A and X, n satisfies 0<n<1, y satisfies 0<y<1, m satisfies 0?m<1, and n+y+m=1.Type: GrantFiled: September 18, 2018Date of Patent: January 9, 2024Assignee: Japan Science and Technology AgencyInventors: Katsutoshi Nagaoka, Yuta Ogura, Katsutoshi Sato
-
Publication number: 20230347320Abstract: A composite oxide including an oxide of a metal element L and an oxide of a metal element N, and represented by a composition of general formula LnN1-n, wherein the metal element L is a Group 1 element, a Group 2 element, or a Group 1 element and a Group 2 element, the metal element N comprises a Group 1 or Group 2 element other than the metal element L, n is 0.001 or more and 0.300 or less, the oxide of the metal element L and the oxide of the metal element N form no solid solution, and oxide particles of the metal element L are deposited on surfaces of oxide particles of the metal element N. Also, a metal-carrier material and an ammonia synthesis catalyst having, supported on this composite oxide, particles of at least one metal M selected from the group consisting of cobalt, iron, and nickel.Type: ApplicationFiled: January 29, 2021Publication date: November 2, 2023Inventors: Katsutoshi Nagaoka, Yuta Ogura, Katsutoshi Sato, Shin-ichiro Miyahara
-
Publication number: 20210246041Abstract: A composite oxide including a metal element represented by the composition of general formula: AnXy, represents an element selected from the group consisting of Sc, Y, and a trivalent lanthanoid; X represents an element selected from the group consisting of Ca, Sr, and Ba; n is 0<n<1; y is 0<y<1; and n+y=1. Also, a metal-supported material in which cobalt particles are supported on the composite oxide.Type: ApplicationFiled: May 7, 2019Publication date: August 12, 2021Inventors: Katsutoshi Nagaoka, Yuta Ogura, Katsutoshi Sato
-
Publication number: 20200247682Abstract: A composite having a composition expressed by AnXyMm wherein, A represents a lanthanoid that is in a trivalent state at least partially or entirely, X represents an element that is a Group-2 element in the periodic table selected from the group consisting of Ca, Sr, and Ba, or a lanthanoid that is different from A, M represents an element that is a Group-1 element in the periodic table, a Group-2 element selected from the group consisting of Ca, Sr, and Ba, or a lanthanoid that is different from A and X, n satisfies 0<n<1, y satisfies 0<y<1, m satisfies 0?m<1, and n+y+m=1.Type: ApplicationFiled: September 18, 2018Publication date: August 6, 2020Inventors: Katsutoshi Nagaoka, Yuta Ogura, Katsutoshi Sato
-
Publication number: 20180186631Abstract: A shift conversion catalyst layer is divided into at least two front and back stages. A first catalyst and a second catalyst are provided on the upstream side and the downstream side, respectively. The first catalyst has a property that a carbon monoxide conversion rate decreases with an increase in carbon dioxide concentration in a supplied reaction gas at a constant carbon monoxide concentration in the supplied reaction gas and a constant reaction temperature. The first catalyst is combined with the second catalyst such that the degree of decrease in carbon monoxide conversion rate with respect to an increase in carbon dioxide concentration in the supplied reaction gas in the second catalyst is lower than that in the first catalyst. Whereby, the conversion rate of a carbon monoxide concentration of a carbon monoxide shift conversion apparatus can be improved without increasing the used amount of a shift conversion catalyst.Type: ApplicationFiled: March 2, 2018Publication date: July 5, 2018Applicant: RENAISSANCE ENERGY RESEARCH CORPORATIONInventors: OSAMU OKADA, MAIKO NAKAYAMA, KAORI MORIMOTO, CHIHIRO ITO, KATSUTOSHI NAGAOKA
-
Patent number: 9962683Abstract: The present invention provides an alloy fine particle including palladium and ruthenium, the alloy fine particle including at least one first phase in which the palladium is more abundant than the ruthenium and at least one second phase in which the ruthenium is more abundant than the palladium, the at least one first phase and the at least one second phase being separated by a phase boundary, the palladium and the ruthenium being distributed in the phase boundary in such a manner that the molar ratio of the palladium and the ruthenium continually changes, a plurality of crystalline structures being present together in the phase boundary.Type: GrantFiled: September 9, 2015Date of Patent: May 8, 2018Assignees: Kyoto University, OITA UNIVERSITY, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATIONInventors: Hiroshi Kitagawa, Kohei Kusada, Hirokazu Kobayashi, Katsutoshi Nagaoka, Katsutoshi Sato, Syo Matsumura, Tomokazu Yamamoto
-
Publication number: 20180071719Abstract: The present invention provides a rare earth oxide-supported noble metal catalyst which has a high catalytic activity, is greatly improved in the ammonia production activity per weight of the catalyst and per amount of the supported metal, and enables the synthesis of ammonia under mild conditions. The catalyst according to the present invention is characterized in that ruthenium is supported in a layered form on a praseodymium oxide carrier. The catalyst according to the present invention can be produced by burning a praseodymium oxide precursor at a lower temperature, then at a medium temperature and then at a higher temperature to produce praseodymium oxide, then agitating the resultant praseodymium oxide together with a ruthenium supply source in a solvent, then removing the solvent from the mixture, and then burning the resultant product.Type: ApplicationFiled: February 19, 2016Publication date: March 15, 2018Inventors: Katsutoshi NAGAOKA, Kazuya IMAMURA, Katsutoshi SATO
-
Publication number: 20170259247Abstract: The present invention provides an alloy fine particle including palladium and ruthenium, the alloy fine particle including at least one first phase in which the palladium is more abundant than the ruthenium and at least one second phase in which the ruthenium is more abundant than the palladium, the at least one first phase and the at least one second phase being separated by a phase boundary, the palladium and the ruthenium being distributed in the phase boundary in such a manner that the molar ratio of the palladium and the ruthenium continually changes, a plurality of crystalline structures being present together in the phase boundary.Type: ApplicationFiled: September 9, 2015Publication date: September 14, 2017Applicants: Kyoto University, OITA UNIVERSITY, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATIONInventors: Hiroshi KITAGAWA, Kohei KUSADA, Hirokazu KOBAYASHI, Katsutoshi NAGAOKA, Katsutoshi SATO, Syo MATSUMURA, Tomokazu YAMAMOTO
-
Patent number: 9673465Abstract: The present invention provides a catalyst in which a reaction initiation temperature at which self-heating function is exhibited is low and which is capable of suppressing carbon accumulation even when a reaction is repeated. The catalyst of the present invention includes a CeZr-based oxide, silicon, and a catalytically active metal, wherein the CeZr-based oxide satisfies CexZryO2 (x+y=1) and the silicon satisfies molar ratios of 0.02?Si/Zr and 0.01<Si/(Ce+Zr+Si)<0.2. When the catalyst is used, a reduction temperature for generating initial oxygen deficiency can be decreased. Depending on the catalytically active metal, a reduction activation treatment can be performed even at about 20° C. without any need for heating. In a repeated hydrogen generating reaction, the deposition of carbon generated on the surface of the catalyst can be suppressed, and a decrease in catalytic activity can be prevented.Type: GrantFiled: March 7, 2013Date of Patent: June 6, 2017Assignees: OITA UNIVERSITY, DOWA HOLDINGS CO., LTD.Inventors: Katsutoshi Nagaoka, Tatsuro Miyazaki, Takuya Yano, Kazumasa Ikari, Toshihiko Ueyama
-
Patent number: 9452417Abstract: The catalyst disclosed is a catalyst including palladium-ruthenium alloy fine particles in which palladium and ruthenium form a solid solution. The palladium-ruthenium alloy fine particles used in this catalyst can be produced by a production method including the step of maintaining a solution containing a protective agent, a reducing agent, a palladium compound or palladium ions, and a ruthenium compound or ruthenium ions at a temperature equal to or higher than a predetermined temperature.Type: GrantFiled: September 18, 2013Date of Patent: September 27, 2016Assignee: Japan Science and Technology AgencyInventors: Hiroshi Kitagawa, Kohei Kusada, Katsutoshi Nagaoka, Katsutoshi Sato, Md. Shahajahan Kutubi
-
Patent number: 9139489Abstract: Provided are a method of manufacturing an olefin having 2 to 4 carbon atoms including: reacting a catalyst with synthesis gas through a Fischer-Tropsch reaction, thereby obtaining the olefin having 2 to 4 carbon atoms, in which the catalyst is a catalyst obtained by reducing the iron ion and the cobalt ion in a dispersion liquid or a solution containing the iron ion, the cobalt ion and a dispersant that interacts with the iron ion and the cobalt ion, and a method of manufacturing propylene, which uses the above manufacturing method.Type: GrantFiled: August 8, 2013Date of Patent: September 22, 2015Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, Kyushu University, NATIONAL UNIVERSITY CORPORATION, NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, NATIONAL UNIVERSITY CORPORATION UNIVERSITY OF TOYAMAInventors: Miho Yamauchi, Katsutoshi Nagaoka, Katsutoshi Sato, Noritatsu Tsubaki, Akihiro Yuasa, Hideyuki Higashimura, Takeshi Ishiyama
-
Publication number: 20150246342Abstract: There is provided a catalyst for hydrocarbon reforming having a high deposition suppressing effect with respect to a carbonaceous material on the catalyst surface even in a case where a reforming material including carbon dioxide, in particular, formed of only carbon dioxide is used in a reforming reaction, a method of manufacturing the same, and a method of manufacturing a synthesis gas using the catalyst.Type: ApplicationFiled: February 26, 2015Publication date: September 3, 2015Applicants: SUMITOMO CHEMICAL COMPANY, LIMITED, NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, SHOEI CHEMICAL INC.Inventors: Kazuro NAGASHIMA, Katsutoshi NAGAOKA, Katsutoshi SATO, Hideyuki HIGASHIMURA
-
Publication number: 20150231605Abstract: The catalyst disclosed is a catalyst including palladium-ruthenium alloy fine particles in which palladium and ruthenium form a solid solution. The palladium-ruthenium alloy fine particles used in this catalyst can be produced by a production method including the step of maintaining a solution containing a protective agent, a reducing agent, a palladium compound or palladium ions, and a ruthenium compound or ruthenium ions at a temperature equal to or higher than a predetermined temperature.Type: ApplicationFiled: September 18, 2013Publication date: August 20, 2015Inventors: Hiroshi Kitagawa, Kohei Kusada, Katsutoshi Nagaoka, Katsutoshi Sato, Md. Shahajahan Kutubi
-
Publication number: 20150171448Abstract: The present invention provides a catalyst in which a reaction initiation temperature at which self-heating function is exhibited is low and which is capable of suppressing carbon accumulation even when a reaction is repeated. The catalyst of the present invention includes a CeZr-based oxide, silicon, and a catalytically active metal, wherein the CeZr-based oxide satisfies CexZryO2 (x+y=1) and the silicon satisfies molar ratios of 0.02?Si/Zr and 0.01<Si/(Ce+Zr+Si)<0.2. When the catalyst is used, a reduction temperature for generating initial oxygen deficiency can be decreased. Depending on the catalytically active metal, a reduction activation treatment can be performed even at about 20° C. without any need for heating. In a repeated hydrogen generating reaction, the deposition of carbon generated on the surface of the catalyst can be suppressed, and a decrease in catalytic activity can be prevented.Type: ApplicationFiled: March 7, 2013Publication date: June 18, 2015Applicants: DOWA HOLDINGS CO., LTD., OITA UNIVERSITYInventors: Katsutoshi Nagaoka, Tatsuro Miyazaki, Takuya Yano, Kazumasa Ikari, Toshihiko Ueyama
-
Publication number: 20140151602Abstract: A shift conversion catalyst layer is divided into at least two front and back stages. A first catalyst and a second catalyst are provided on the upstream side and the downstream side, respectively. The first catalyst has a property that a carbon monoxide conversion rate decreases with an increase in carbon dioxide concentration in a supplied reaction gas at a constant carbon monoxide concentration in the supplied reaction gas and a constant reaction temperature. The first catalyst is combined with the second catalyst such that the degree of decrease in carbon monoxide conversion rate with respect to an increase in carbon dioxide concentration in the supplied reaction gas in the second catalyst is lower than that in the first catalyst. Whereby, the conversion rate of a carbon monoxide concentration of a carbon monoxide shift conversion apparatus can be improved without increasing the used amount of a shift conversion catalyst.Type: ApplicationFiled: July 6, 2011Publication date: June 5, 2014Applicant: Renaissance Energy CorporationInventors: Osamu Okada, Maiko Nakayama, Kaori Morimoto, Chihiro Ito, Katsutoshi Nagaoka
-
Publication number: 20140045955Abstract: Provided are a method of manufacturing an olefin having 2 to 4 carbon atoms including: reacting a catalyst with synthesis gas through a Fischer-Tropsch reaction, thereby obtaining the olefin having 2 to 4 carbon atoms, in which the catalyst is a catalyst obtained by reducing the iron ion and the cobalt ion in a dispersion liquid or a solution containing the iron ion, the cobalt ion and a dispersant that interacts with the iron ion and the cobalt ion, and a method of manufacturing propylene, which uses the above manufacturing method.Type: ApplicationFiled: August 8, 2013Publication date: February 13, 2014Applicants: SUMITOMO CHEMICAL COMPANY , LIMITED, National University Corporation University of Toya ma, NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATIONInventors: Miho YAMAUCHI, Katsutoshi NAGAOKA, Katsutoshi SATO, Noritatsu TSUBAKI, Akihiro YUASA, Hideyuki HIGASHIMURA, Takeshi ISHIYAMA
-
Publication number: 20090221421Abstract: There is provided a catalyst for producing hydrogen comprising a porous body, as a support, comprising either one of an amorphous phase oxide and a composite oxide containing titanium and zirconium in which titanium has a mol ratio of 5 to 75% and zirconium has a mol ratio of 25 to 95% to the sum of these two, the porous body having a micro-hole diameter distribution peak in the range of 3 nm to 30 nm; and catalytic active metal grains carried on the a gas contact surface of the support, and the catalytic active metal has a content of 1 to 30% by mass to the sum of the porous body and the catalytic active metal, and a method of manufacturing thereof. This suppresses sintering or coking causing activity deterioration, thereby minimizing reaction ratio variations with time. A fuel reformer having the above catalyst, and a fuel cell having the fuel reformer are also provided.Type: ApplicationFiled: October 19, 2006Publication date: September 3, 2009Applicant: KYOCERA CORPORATIONInventors: Fumiaki Sagou, Yusaku Takita, Katsutoshi Nagaoka