Detection of alkali path in a pilot-scale combustor using laser spectroscopy and surface ionization — From vapor to particles

Alkali species have been under intensive research in thermal conversion applications due to their abundance especially biomass fuels. metals, sodium (Na) and potassium (K), are known cause severe operational problems combustion units, such as slagging, fouling, corrosion. In this work, we present a monitoring method follow alkali behavior from vapor particles pilot-scale reactor. our approach combine Tunable Diode Laser Atomic Spectroscopy (TDLAS) for atomic monitoring, Collinear Photofragmentation Absorption (CPFAAS) KCl KOH detection, Surface Ionization Detection (SID) of total flue gas aerosol content. Experiments were carried out the Chalmers 100 kW oxy-fuel unit that, during these experiments, used propane fuel. injected water solution directly flame. addition, SO2 was alter conditions formation injecting it feed gas. Due system described, able monitor nucleation sulfation processes. The dimer heterogeneous observed when temperature changed by lowering input unit.