Abstract
Fundamental pyrolysis and combustion characteristics of several types of biomass were studied, using a thermogravimetric analyzer. An electrically heated drop tube furnace was employed to elucidate the effect of the biomass addition on the combustion behavior, NOx emission characteristics and ash formation. The results obtained show that pyrolysis and combustion characteristics of biomass depend on lignin and cellulose compositions in the biomass. The biomass can enhance the ignition of the low-grade coal. However, NO and N_2O emission behaviors under the co-combustion condition resemble those under the coal combustion condition. When the only biomass is burned, fine particulates of less than 2μm are produced. However, the coal ash captures the fine particulates from biomass during co-combustion.
