Corn biomass was combusted in a bubbling fluidized bed at 720-950 degrees C to study the process course. At above 720 degrees C, the sand bed agglomeration was obsd. At above 900 degrees C (10-30% air excess), degasification of volatile components was so intense that concns. of CO and hydrocarbons were 4% and 0.4%, resp. Emissions of HCN, NH3 and NO were also evidenced. The biomass gasification was more intense at higher temps. The concns. of HCN and NH3 increased with the increasing temp. At low temp. and high O-2 concn., the NOx were dominant form of N in the off-gas.