Partial Oxidation of Methane to Synthesis Gas over Oxidized Diamond Supported Catalysts—Catalytic Behavior of Nickel and Cobalt Species—

DOI Web Site Web Site 3 Citations 51 References Open Access
  • Nishimoto Hiro-aki
    Dept. of Chemical Engineering, Kansai University
  • Ikenaga Na-oki
    Dept. of Chemical Engineering, Kansai University
  • Nakagawa Kiyoharu
    Dept. of Chemical Engineering, Kansai University High Technology Research Center, Kansai University Japan Science Technology Corp. (JST) and National Institute for Materials Science (NIMS)
  • Konishi Toru
    Dept. of Chemical Engineering, Kansai University
  • Suzuki Toshimitsu
    Dept. of Chemical Engineering, Kansai University High Technology Research Center, Kansai University

Bibliographic Information

Other Title
  • 酸化ダイヤモンド担持触媒を用いたメタンの部分酸化反応による合成ガス生成－ニッケルおよびコバルトの触媒挙動－
  • Partial Oxidation of Methane to Synthesis Gas over Oxidized Diamond Supported Catalysts--Catalytic Behavior of Nickel and Cobalt Species

Search this article

Description

Characterization of nickel and cobalt catalysts supported on oxidized diamond (O-dia) in the partial oxidation of methane to synthesis gas was carried out by X-ray photoelectron spectroscopy (XPS) and the transient response pulse technique. Carbon deposition occurred on nickel/O-dia, but not on cobalt/O-dia catalyst at 873 K throughout prolonged reaction. XPS analyses observed partially reduced nickel oxides on nickel/O-dia catalyst after reaction with methane/oxygen (5/1) at 873 K. Co(0), partially reduced cobalt oxide, and Co(III) oxide phases were found on cobalt/O-dia catalyst after reaction at 873 K. Transient response methane/oxygen (2/1) pulse studies found a large amount of hydrogen production occurred immediately at 873 K over the nickel/O-dia catalyst. However, a very small amount of hydrogen production was seen over the cobalt/O-dia catalyst, indicating that nickel and cobalt species supported on O-dia exhibited different behavior. Transient response of the catalyst bed temperature found that endothermic reaction occurred on the nickel/O-dia catalyst at 873 K, but exothermic reaction proceeded on the cobalt/O-dia catalyst. These results suggest that methane decomposition to hydrogen is the primary reaction path over nickel/O-dia catalyst, whereas complete oxidation is the primary reaction followed by steam and carbon dioxide reforming to produce synthesis gas over the cobalt/O-dia catalyst.<br>

Journal

Citations (3)*help

See more

References(51)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top