| abstract |
Catalysts for removing nitrogen oxides used in the presence of hydrocarbons or oxygen-containing organic compounds, which comprise alumina as a porous heat-resistant carrier, prepared by hydrolysis of an organic aluminium compound, and at least one member as an active component, selected from silver and a silver compound and carried on said carrier, said alumina carrier being replaceable with a silica-alumina containing 0.5 to 15 weight % of silica. |