Operation experience of selective catalytic NO sub x removal systems for miscellaneous flue gas

In the early 1960's NO{sub x} emissions became a grave social problem and, in July of 1970, the first victims of photochemical smog were reported at a high school in Tokyo. Power plants are not the sole source of NO{sub x} emission. However, electric power companies started first to grapple with this troublesome issue. Since then many kinds of control measures have been studied, and many pilot plants and demonstration plants have been installed and operated. The governmental regulation on NO{sub x} emission was first issued in 1973, and the level of regulation became more stringent in subsequent years for power plants. The current regulation is shown. In Feb. of 1988, the governmental regulation on NO{sub x} emission for co-generation system of diesel engines and gas turbines came into force in order to reduce NO{sub x} emission from diesel engine co-generation plants and gas turbine co- generation plants. The regulation applicable to co- generation plants is shown. According to these governmental regulation, selective catalytic NO{sub x} removal (S.C.R.) systems for miscellaneous flue gas were supplied. These systems are discussed in the book.