CHAPTER VII. EXPERIMENTAL WORK ON NOX-SOX INTERACTIONS
The formation of nitrogenous species in the drop-tube furnace has been investigated in previous chapters. Also a literature review has been carried out which showed that NOX emissions can be notably affected by the presence of sulphurous species in the combustion system at all equivalence ratios. However, contradictory conclusions were drawn from the experimental work carried out in the past.
This chapter is dedicated to study such an effect on the fuels investigated in the drop-tube furnace. Two types of experiment were performed. In the first part of the work the change of NOX emissions with the addition of increasing amounts of SO2 were investigated. Relevant parameters in this study were:
- The fuel composition, primarily the N, S and water contents
- The equivalence ratio, as the extent and orientation of the alteration seems to depend strongly on the combustion environment
- The amounts of SO2 added to simulate increasing concentrations of fuel-S, in order to assess the extent of the effect of sulphur on NOX species.
Once the effect of S on NOX had been established, a second group of experiments was aimed to determine where the interaction between N and S species occurred along the gas path. The sampling distance from the atomiser was an essential parameter in these experiments.
Pollutant formation and interaction in the combustion of heavy liquid fuels
Luis Javier Molero de Blas, PhD thesis, University of London, 1998
© Luis Javier Molero de Blas
