Combustion Properties of Pelletized Biomass

Four samples of biomass pellets,made from wheat straw,corn straw,plywood powder and pine powder,were analyzed on their combustion properties through the TG-DTG technology.The ignition and burn-out characters and the integrated combustion properties of each sample were studied.An integrated combustion indes,S,was modified to evaluate the combustion properties.To calculate this indes,relative weight loss velocity was adopted instead of the absolute weight loss velocity.Results show that compared with coal,the biomass pellets have the relative lower ignition and burn-out temperature and faster combustion rate;compared with biomass powder,the combustion of fix carbon in the biomass pellets is more stable and the combustion time is longer.Among the four samples,the combustion properties of the pine pellets are the best,while that of the corn straw pellets are the worst.