The effect of the vanadium component on the life of the WO3-TiO2 catalyst used for the reduction of NOx with NH3.

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概要

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• The 5000-h life test of the WO<SUB>3</SUB>–TiO<SUB>2</SUB> catalyst for the reduction of NO<I><SUB>x</SUB></I> with NH<SUB>3</SUB> has been investigated in real flue gases containing vanadium and SO<I><SUB>x</SUB></I> on a pilot plant. When the present catalyst was used in a residual-oil-fired-boiler flue gas, steady activities over 90% of NO<I><SUB>x</SUB></I> reduction were achieved for 5000 h at 400 °C (space velocity: 2700 h<SUP>−1</SUP>). On the other hand, when the catalysts were taken out of the reactors at certain intervals and studied by means of a laboratory reactor, they were much more active than fresh catalyst at lower temperatures (250–350 °C). Also, the SO<SUB>2</SUB> oxidation efficiency increased with the reaction time. This activation was considered to be due to the vanadium component in the flue gas.

• 公益社団法人 日本化学会の論文

著者

• Morikawa Shigeru

  Research Institute of Ishikawajima Harima Heavy Industries Co., Ltd.

• Takahashi Kazumasa

  Research Institute of Ishikawajima Harima Heavy Industries Co., Ltd.

• Mogi Junichi

  Research Institute of Ishikawajima Harima Heavy Industries Co., Ltd.

• Kurita Satoru

  Research Institute of Ishikawajima Harima Heavy Industries Co., Ltd.

関連論文

• The effect of the vanadium component on the life of the WO3-TiO2 catalyst used for the reduction of NOx with NH3.

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