On CO and NOx emission in the kinetic combustion of propane/natural gas mixtures

Concentrations of CO and NOx during combustion of propane/natural gas mixtures in air and in air enriched with oxygen have been investigated. The mixtures were: low-propane (up to 10 vol. %) and high-propane (up to 45 vol. %) types. A large effect of the propane content on the CO concentration in combustion gases was observed; stronger for the low-propane mixtures. The increase in the NOx concentration with increasing propane content was lower and similar for the two types of mixtures.