Hideaki Hamada

Hosei University

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Masaaki Haneda

Nagoya Institute of Technology

Yoshiaki Kintaichi

National Institute of Advanced Industrial Science and Technology

Motoi Sasaki

National Institute of Advanced Industrial Science and Technology

Megumu Inaba

National Institute of Advanced Industrial Science and Technology

Tomohiro Yoshinari

Astellas Pharma (Japan)

Tadahiro Fujitani

National Institute of Advanced Industrial Science and Technology

Takehiko Ito

Tokyo Institute of Technology

Asima Sultana

National Institute of Advanced Industrial Science and Technology

Mitsunori Tabata

Cosmo Oil (Japan)

Kazuhito Sato

Akita Prefectural University

Cooperative Institutions

National Institute of Advanced Industrial Science and Technology

The University of Tokyo

Kyoto University

Tokyo Institute of Technology

Centre National de la Recherche Scientifique

Tokyo University of Science

Osaka University

Tohoku University

National Chemical Laboratory

National Institute for Materials Science

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High Catalytic Activity of Silver Supported TiO2-ZrO2 Catalysts for the Selective Catalytic Reduction of NO in the Presence of Oxygen.

NIPPON KAGAKU KAISHI (1996)

Masaaki Haneda Yoshiaki Kintaichi Megumu Inaba Hideaki Hamada

The catalytic performance of silver-supported and -unsupported TiO2-ZrO2 catalysts for the selective reduction of NO, in the presence of oxygen, was investigated by using a fixed-bed flow reactor system. The addition of silver promoted the catalytic activity of TiO2, Zr02 and TiO2-ZrO2 for NO reduction with propene. Compared with Ag/TiO2 and Ag/ZrO2, Ag/TiO2-ZrO2 could reduce NO into N2 with more than 90% selectivity. Although the catalytic activity of Ag/TiO2-ZrO2 for NO reduction with propene was depressed by water vapor, enhancement of NO conversion by the presence of water vapor was observed when 2-propanol or acetone was used as the reductant.

Propene

Selective catalytic reduction

Selective Reduction

10.1246/nikkashi.1996.212

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Citations (0)

Synthesis of giant zeolite crystals by a bulk material dissolution technique

Microporous and Mesoporous Materials (2001)

Shinichi Shimizu Hideaki Hamada

Hydrothermal Synthesis

10.1016/s1387-1811(01)00328-6

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Citations (43)

Mechanistic study of the effect of coexisting H2O on the selective reduction of NO with propene over sol–gel prepared In2O3-Al2O3 catalyst

Applied Catalysis B Environment and Energy (2003)

Masaaki Haneda Yoshiaki Kintaichi Nicolas Bion Hideaki Hamada

Propene

XANES

10.1016/s0926-3373(02)00215-1

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Citations (41)

Oxide aerogel catalysts

Journal of Non-Crystalline Solids (1998)

Hiroshi Hirashima Chihiro Kojima Ken Kohama Hiroaki Imai V. Balek

Supercritical drying

Alkoxide

10.1016/s0022-3093(98)00035-0

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Citations (41)

Catalytic Performance of Alumina for NOx Control in Diesel Exhaust

SAE technical papers on CD-ROM/SAE technical paper series (1994)

Hiroshi Tsuchida Mitsunori Tabata Katsumi Miyamoto Tomohiro Yoshinari Hatsutaro Yamazaki

Diesel exhaust fluid

10.4271/940242

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Citations (4)

Hydrogenation of Carbon Monoxide into C2-Oxygenated Compounds over Silica-supported Bimetallic Catalyst Composed of Ir and Ru.

Sekiyu Gakkaishi (1998)

Yoshiaki Kintaichi Yoichi Ito Hideaki Hamada Hideo Nagata Katsuhiko Wakabayashi

Silica-supported bimetallic catalysts composed of the Pt-group metals except Rh were investigated for the CO hydrogenation into C2-oxygenated compounds such as ethanol, acetaldehyde and acetic acid. The bimetallic catalyst of Ir and Ru, which was prepared by simultaneous impregnation of the metals, exhibited the highest selectivity to the C2-oxygenated compounds. It was considered from the findings obtained by the CO hydrogenation and from the behavior of CO adsorbed on the catalyst (temperature-programed reduction profile and infrared spectum) that the alloy of Ir and Ru was an active component in the CO hydrogenation and that the chemical properties of the alloy were varied by the preparation procedure and the Ir content in the alloy. The addition of Li onto the bimetallic catalyst promoted the CO hydrogenation into the C2-oxygenated compounds, and increased the selectivity up to 38.4% at 280°C

Bimetallic strip

10.1627/jpi1958.41.66

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Citations (2)

Ir/SiO₂ as a Highly Active Catalyst for the Selective Reduction of NO with CO in the Presence of O₂ and SO₂.

ChemInform (2004)

Masaaki Haneda Tomohiro Yoshinari Kazuhito Sato Yoshiaki Kintaichi Hideaki Hamada

Abstract For Abstract see ChemInform Abstract in Full Text.

Selective Reduction

10.1002/chin.200405018

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Catalytic Performance of Protonated Zeolites and Alumina for the Selective Reduction of Nitrogen Oxides by Hydrocarbons.

Sekiyu Gakkaishi (1993)

Hideaki Hamada Yoshiaki Kintaichi Mitsunori Tabata Motoi Sasaki Takehiko Ito

炭化水素類による窒素酸化物の選択還元反応における, プロトン型ゼオライトおよびアルミナ触媒の特性を他の触媒と比較して検討した。本反応は, 当初銅ゼオライト触媒に特異的と考えられていたが, 著者らは固体酸性質を有する上記触媒が高い性能を示すことを見い出した。これらの触媒は銅ゼオライトに比較して, 高温条件やガス流速が小さい場合に高いNO還元率を与え, NO還元の選択性 (炭化水素の酸素雰囲気下におけるNO還元効率) が優れていた。また, 活性と固体酸性との間に相関が認められた。本反応には, NO還元が進むある温度領域が存在し, 酸素が低温でのNO還元を促進した。アルミナ触媒について検討した結果, 還元剤としては水素, 一酸化炭素は効果がなく, パラフィン<オレフィン<アルコールの順に低温で効率的にNO還元が起こった。アルミナにコバルトのような遷移金属を担持すると, 低温, 高空間速度条件でのNO還元率が向上した。固体酸型触媒では, 反応経路としてNOのNO2への酸化が重要な反応ステップであると考えられた。

Selective catalytic reduction

Nitrogen oxides

Selective Reduction

Nitrogen oxides

10.1627/jpi1958.36.149

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Citations (16)

Synthesis of acetonitrile from syngas and ammonia over silica-supported molybdenum catalysts modified by silver.

Sekiyu Gakkaishi (1987)

Hideaki Hamada Yasushi Kuwahara Yutaka Matsuno Katsuhiko Wakabayashi

Direct synthesis of acetonitrile from syngas and ammonia over silica-supported molybdenum catalysts was studied. The catalysts were prepared by impregnation of silica followed by calcination and reduction. The reduction treatment in the preparation, however, had little influence on the activity of Mo/SiO2, because the reduction of Mo species on silica proceeds under the reaction atmosphere. Ag had an excellent effect on the catalyst to improve its activity and selectivity to acetonitrile. The optimum reaction temperature was between 450°C and 500°C. The weight change of Mo/SiO2 and Mo-Ag/SiO2 during reduction treatment suggested that MoO2 is the supported Mo species, regardless of whether Ag is added as a promoter or not. From the X-ray diffraction measurements, it was speculated that MoO2 is the active species for the formation of acetonitrile and that Ag has an effect of making MoO2 amorphous or more dispersed. The deactivation of the catalysts may be caused by both crystal growth of MoO2 and surface fouling.

10.1627/jpi1958.30.188

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Citations (2)

In Situ Fourier Transform Infrared Study of the Selective Reduction of NO with Propene over Ga2O3–Al2O3

Journal of Catalysis (2002)

Masaaki Haneda Nicolas Bion Marco Daturi J. Saussey Jean‐Claude Lavalley

Propene

Reactivity

Reaction intermediate

10.1006/jcat.2001.3478

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Citations (66)