SIZE DISTRIBUTION AND FUNCTIONALITIES OF PARTICLES FORMED IN PREMIXED ETHYLENE/BUTANOLS FLAMES

Butanols represent a source of biofuel derived from biomass and their impact on combustion characteristics and emissions has been increasingly studied. The main combustion parameters (laminar flame speeds and ignition delay times) have been already assessed, e.g., [1]. Studies [2-5] show that the combustion configuration as well as the amount of butanol play a determinant role in determining the effect on butanols on the total amount, on reactivity and on the presence of oxygenated functionalities on soot samples and their link to isomer structures is present. In this paper we focused on this latter aspect by using butanol isomers in premixed configuration as 20% of total carbon. Particle size distribution (PSD) measurements and batch analysis on sampled material are used to evaluate the impact of butanol on the formation of small particles and assess the presence of oxygen in the combustion-formed particles.