Controlling Nitrogen Oxide Emissions from Industrial Sources AN APPLICATION FOR SELECTIVE CATALYTIC HEDUCTION

The pollution problem known as acid rain has focused attention on the need to control all major sources of contributing emissions. The use 0.f platinum metal catalysts to control automobile exhaust gases is now well developed but in fact over half the man-made nitrogen oxides exhausted into the atmosphere are emitted from sources other than vehicles, and include power station boilers, industrial boilers and stationary internal combustion engines. Several methods may be used to prevent these emissions, and platinum catalysts, either alone or in combination with one or more of the base metal catalysts currently used, appear to have considerable potential.for this application. The pollution of the atmosphere by nitrogen oxides has been a subject of growing concern during the past decade. Photochemical smog (I, z), to which nitrogen oxides contribute, and which causes respiratory and eye damage