Effect of Support Particle Morphology of Ni Catalysts on Growth of Carbon Nanotubes by Methane Decomposition

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  • Nakayama Akinori
    Dept. of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
  • Asai Kouta
    Dept. of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
  • Nagayasu Yoshiyuki
    Dept. of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
  • Iwamoto Shinji
    Dept. of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
  • Yagasaki Eriko
    Energy Use R&D Center, The Kansai Electric Power Co., Inc.
  • Inoue Masashi
    Dept. of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University

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  • メタン分解反応によるカーボンナノチューブ成長におけるNi触媒担体の形状の影響

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Abstract

The effect of the morphology of the support particles on nickel-catalyzed decomposition of methane into carbon nanotubes and hydrogen was explored using a thermogravimetric apparatus. Er3Ga5O12 synthesized by the glycothermal method was used as the support of the Ni catalyst. As calcination temperature increased, morpho-l-ogy and pore-size distribution of Er3Ga5O12 changed. High carbon nanotube yield was attained over Ni catalyst supported on Er3Ga5O12 particles with spherical shape and smooth surfaces. Various aluminas were also examined for the support of the Ni catalysts. Quite high carbon yield was observed over Ni catalyst supported on spherical Al2O3 particles (Nanophase Technologies Corp.). Spherical support particles with smooth surfaces touch at a point, so can change positions easily. Therefore, the most important factor governing the carbon yield is the morphology of the catalyst support.<br>

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