Abstract
Fundamentals of pyrolysis and combustion characteristics of several types of biomass were studied, using a thermogravimetric analyzer. In order to elucidate effect of the biomass addition on coal combustion behavior, combustion performance, NOx emission characteristics and ash formation were discussed, using an electrically heated drop tube furnace. The results obtained showed that pyrolysis and combustion characteristics of biomass depended on lignin and cellulose composition in the biomass. The biomass could enhance the ignition of the low-rank coal. However, NO and N_2O emission behaviors under the co-combustion condition resembled those under the coal combustion. When the biomass was burned alone, fine particulates of less than 2,, m are produced. Under the co-combustion condition, coal ash could capture the fine particulates from the biomass during combustion.
