Summary

This paper examines the potential of flameless oxidation (FLOX®) to reduce NOx emissions from pulverized coal combustion. The experiments were carried out at a 20 kWt experimental furnace at the University of Stuttgart. Systematic parameter studies of the air ratio at the burner, the coal type and the secondary air velocity were made for flameless oxidation and flame combustion. The results of these tests are discussed and the potential of flameless oxidation technology to reduce NOx emissions from pulverized coal combustion is presented. Experiments have shown a considerable NOx reduction capability with the current FLOX®-coal burner design. These reductions depend mainly on the burner air ratio and the coal type.