The reduction of nitrogen monoxide with ammonia on the activated surface of steel plates. 2. Catalyst with high durability against sulfuric acid.

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  • NAGAI Ken-ichi
    Technical Research Institute, Hitachi Shipbuilding & Engineering, Ltd.
  • HAMA Toshio
    Technical Research Institute, Hitachi Shipbuilding & Engineering, Ltd.
  • KAMINO Yasumi
    Technical Research Institute, Hitachi Shipbuilding & Engineering, Ltd.
  • ICHIKI Masayoshi
    Clean Air System Development Department, Hitachi Shipbuilding & Engineering, Ltd.
  • INABA Hideya
    Clean Air System Development Department, Hitachi Shipbuilding & Engineering, Ltd.

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Other Title
  • 鋼板の活性化表面上でのアンモニアによる一酸化窒素の還元反応 (第2報)
  • Catalyst with High Durability against Sulfuric Acid

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The resistance to the effects of SO3 on the activity of the catalyst prepared from a mild steel plate was improved by addition of a vanadium compound and by calcination at temperature above 600°C. The reaction kinetics of NO reduction with NH3 on the modified catalyst can also be expressed by the equation, <br>-1/KNH<sub>3</sub>(PNH<sub>3</sub>in-PNOin)•ln(1-x)PNH<sub>3</sub>in/PNH<sub>3</sub>in-xPNOin-ln(1-x)=k'RPT√KO<sub>2</sub>inPO<sub>2</sub>in/1+KH<sub>2O</sub>PH<sub>2O</sub>in+√KO<sub>2</sub>PO<sub>2</sub>in•A/F<br>which was originally proposed for the reaction kinetics on the unmodified catalyst.1)<br>The durability of a modified catalyst of the honeycomb form was verified by the results of the catalyst life tests done with the flue gas from a heavy oil fired boiler.

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