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denitrification of waste gas
environ.	desnitrificación del gas de residuos
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.	desnitrificación del gas de residuos