Studies on characteristics of biomass co-firing ash

Cornstalk and coal were used for co-combusting experiment. The ash samples were measured by certain instruments to obtain some physical characteristics such as ash specific resistance (R), adhesive force, and chemical composition. The results showed that the R of both pure biomass ash and co-firing ash ranged from 10⁸-10¹¹ (Ω·cm). The R values changed with the temperature based on some rules. The viscosity of pure biomass ash was greater than that of other ash samples, and the ash viscosity increased with mixing ratio (R_t). Co-combustion altered ash chemical components as well as contents, which resulted to the different physical characteristics. It suggests that Electrostatic Precipitator is more suitable for co-firing ash collection than Fabric Filter owing to the influence of ash characteristics.