Cr-Cu合金によるメタンの分解挙動

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タイトル別名
  • Cr Cu ゴウキン ニ ヨル メタン ノ ブンカイ キョドウ
  • Thermal decomposition of CH4 by Cr-Cu alloy

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To examine the applicability of Cr-Cu alloys for thermal decomposition of hydrocarbons, thermal decomposition of methane by Cr-Cu alloy were carried out. Cr-Cu alloys were prepared by the argon arc melting. The argon arc discharge was maintained until the copper only melted. The prepared alloy was constructed the mixture of chromium grains and the fused copper, because chromium is not miscible with copper and no intermetallic compounds are formed. The alloy ingots prepared were chipped to small needles to use for thermal decomposition of methane. The thermal decomposition of methane by Cr-Cu alloy needles was took place by means of the temperature-programmed method which the ramp rate was 2.28 K/min. By pure chromium, methane was decomposed to hydrogen gas and chromium carbides at 1060 K. On the other hand, the Cr-Cu alloy needles initiated the decomposition of methane at 900 K. The initiation temperature of the methane decomposition was reduced about 160 K on comparison pure chromium with the alloy. The alloying effect on the reduction of the initiation temperature of thermal decomposition was, however, appeared on the virgin alloy needles.

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