Obtain accurate NOX values for strategies to reduce emissions from combustion

In the process of developing low-nitrogen-oxide-emissions (NOX) combustion appliances, the request for the volume of NOX emissions from the tail flame is given in milligrams/kilowatt hour (mg/kWh) in almost all national and regional standards and related certifications. However, the instrument that measures NOX in the exhaust tail flame of the combustion reports only in ppm or mg/m3. This requires the calculation of the NOX in mg/kWh, based on the measured NOX in ppm or mg/m3 and related data for these specific combustion systems. This article summarizes how the combustion industry presently converts ppm to mg/m3 and introduces a concept for measuring the emission rate of a combustion syste