摘要 |
PURPOSE:To efficiently treat exhaust gas, by contacting gas containing NOX, CO and O2 with a specific catalyst in the presence of NH3 and H2O to reduce NOX to N2 while converting CO to CO2 and H2. CONSTITUTION:A catalyst consisting of TiO2 being a main component, at least one oxide of an element selected from Mo, W, V, Se, Ni, Co and Mn being a second component and one or more of oxide of Pt, Pd, Ph or Ru and/or one or more of oxide of Fe, Cr or Cu being a third component is contacted with gas containing NOX, CO and O2 in the presence of NH3 and H2O and NH3 is reduced to N2 while CO is converted to CO2 and H2. Reaction temp. is pref. 150-600 deg.C. |