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denitrification of waste gas
environ.	dénitrification des effluents gazeux; dénitrification des gaz de combustion; dénitrification des gaz de fumées; dénitrification des gaz résiduaires
denitrification of waste gas Current methods for controlling NOx emissions in motor vehicles include retardation of spark timing, increasing the air/fuel ratio, injecting water into the cylinders, decreasing the compression ratio, and recirculating exhaust gas. For stationary sources, one abatement method is to use a lower NOx producing fuel or to modify the combustion process by injecting steam into the combustion chamber
environ.	dénitrification des effluents gazeux