オフガス中メタンの高効率処理のための触媒反応に関する一考察

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  • 赤間 弘
    日産自動車株式会社 総合研究所 先端材料研究所

書誌事項

タイトル別名
  • Consideration on the Catalytic Reactions for Effective Treatment of Residual Methane in Off-gas
  • オフガス チュウ メタン ノ コウコウリツ ショリ ノ タメ ノ ショクバイ ハンノウ ニ カンスル イチ コウサツ

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説明

<p>Catalytic reactions have been investigated to remove CH4 efficiently from the off-gas containing moisture of relatively high concentration. While the high temperature above 600 degree C was needed to remove CH4 by 90% conversion by means of catalytic combustion method using precious metal catalysts, the O2 control method could be applied to remove CH4 with high conversion above 90% at 450 degree C under the high moisture condition.The elemental catalytic reactions for the CH4 conversion were studied under the O2-H2O co-existing condition in comparison with the reactions under the H2O non-existing condition.The oxidation reaction of CH4 was strongly inhibited below 350 degree C by the presence of H2O. On the other hand, the steam reforming reaction was occurred so that the CH4 reacted with H2O more preferentially than O2 above 350 degree C. And the CH4 removal was promoted by the oxidation of H2 which resulted of the steam reforming reaction. Oxygen inhibited the steam reforming reaction when the O2 concentration amounted to or exceeded the stoichiometry under the O2-H2O co-existing condition.The cause was considered that oxygen was strongly adsorbed on the catalyst surface when the H2O co-existed.</p>

収録刊行物

  • 日本燃焼学会誌

    日本燃焼学会誌 54 (169), 174-183, 2012

    一般社団法人 日本燃焼学会

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