Chemical composition and morphology of particles emitted from a wet flue gas desulfurization (WFGD) system

•Particles emitted from WFGD system are mainly carried from the SiO2 inlet gas flow.•The inlet particle characteristics and the L/G ratio affect the particle emissions.•Ca and S are the dominant elements in particles that are carried from slurry.•The particles emitted from the WFGD system were dominated by fine particles.•The mean diameter of the emitted particles were between 0.6 and 1.2 μm.