| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nitrous oxide removal method capable of efficiently removing nitrous oxide at a lower temperature. <P>SOLUTION: By using a catalyst for decomposing the nitrous oxide for which at least one kind or two or more kinds of catalyst metals selected from Rh, Ir, Pd, Pt and Ru are carried by a carrier whose main body is compound oxide including porous Al<SB>2</SB>O<SB>3</SB>for which a mean pore diameter is 8-16nm and the relative half-value width of pore diameter distribution is ≤0.5, while bringing a gas containing at least N<SB>2</SB>O into contact with the catalyst for decomposing the nitrous oxide in the temperature range of 250-400°C, at least one kind or two or more kinds of reducing agents selected from hydrogen, carbon monoxide, methanol, dimethyl ether, methane, propane, butane and ethylene are made to coexist in the gas atmosphere. <P>COPYRIGHT: (C)2007,JPO&INPIT |
