A Study of Catalysis by Uranium Oxide and Its Mixed Catalysts. IX. A Catalytic Reduction of Nitric Oxide with Carbon Monoxide

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概要

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• The reduction of NO with CO over the uranium oxide catalyst and its mixed catalysts with alkali metal oxide or alkaline earth metal oxide has been investigated using conventional flow and pulse reactors at temperatures of 250 to 450 °C under atmospheric pressure. The activity of the uranium oxide catalyst without any additive was higher than that of the Fe<SUB>2</SUB>O<SUB>3</SUB> catalyst, although it was inferior to that of the CuO–Cr<SUB>2</SUB>O<SUB>3</SUB> catalyst. The addition of alkali metal oxide or alkaline earth metal oxide to uranium oxide, particularly in the case of Cs<SUB>2</SUB>O or K<SUB>2</SUB>O, was effective in enhancing the catalyst activity. The W/F-conversion curves revealed that the reduction of NO to N<SUB>2</SUB> proceeds consecutively, passing through N<SUB>2</SUB>O as a gas-phase intermediate. The reaction rates were formulated as <I>r</I>=<I>kP</I><SUB>CO</SUB><SUP>1.0</SUP><I>P</I><SUB>NO</SUB><SUP>0.4</SUP>. The kinetic study suggested a redox reaction sequence. The oxidation states of the catalysts were discussed on the basis of X-ray diffractograms.

• 公益社団法人 日本化学会の論文

著者

• Nozaki Fumio

  Department Of Applied Chemistry Faculty Of Engineering Chiba University

• Mano Yoshikazu

  Department of Industrial Chemistry, Faculty of Engineering, Chiba University

• Matsukawa Fumio

  Department of Industrial Chemistry, Faculty of Engineering, Chiba University

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• A study of catalysis by metal phosphate. III. The dehydrogenation of alcohols over cadmium phosphate and the influence of CCL4 addition on the catalytic reaction.
• A Study of Catalysis by Uranium Oxide and Its Mixed Catalysts. IX. A Catalytic Reduction of Nitric Oxide with Carbon Monoxide

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