The Effect of Combustion of Natural Gas With 21–29% O2/CO2/N2Mixtures on Emission of Carbon Monoxide

Zofia Kalicka 1 , Wojciech Jerzak 1 ,  and Elżbieta Kawecka Cebula 1
  • 1 AGH University of Science and Technology Faculty of Metal Engineering and Industrial Computer Science Department of Heat Engineering and Environment Protection 30-059 Kraków, al. Mickiewicza 30, Poland


Natural gas combustion was carried out in air enriched with oxygen in the amount of 25 and 29% with addition of CO2 in place of part of nitrogen. The research was carried out at different flow rates of gas and oxygen excess ratios. The concentration of CO and NOx was analyzed. It has not been proved that the increased oxygen concentration influences significantly the CO concentration. However, the addition of CO2 caused a substantial variability of CO concentration in the exhaust gas, in contrast to the concentration of NOx which decreased monotonically. Model calculations, performed with use of FactSage, indicate an increase in the concentration of CO not only for the air enriched with oxygen, but after adding CO2 too, as well

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