Nitrogen Oxides Emmision Control CDL/Vitok Enhanced Absorption Process

Abstract

Abstract The CDL/Vitok enhanced absorption process provides an attractive solution to the problem of NOX emissions from chemical manufacturing plants. The technology was developed from pilot plants, full scale demonstration plants and detailed analyses of many operating absorbers. The process uses the princinple of scrubbing tail gas with nitric acid under conditions which reduce the nitrogen oxides to the desired level. Both physical absorption and stripping and chemical oxidation absorption are used. No chemicals other than water are required for the process. All the nitrogen oxides removed from the tail gas are converted to nitric acid at useful concentrations. The technology covers a wide range of operating conditions. A number of commercial installations of the process have been made including both the retrofitting of existing plants and new plants. These handle tail gases from the manufacturing of inorganics and nitration of organics as well as from nitric acid plants.