A fast pyrolysis process yields 15%wt (d.b.) raw char which contains only 80% of pure carbon. Could it possibly provide the heat needed for the feedstock to reach the operating temperature of 550?C if it is completely combusted in a furnace and supplied to the pyrolyzer? Do you need to provide externally additional heat to maintain 55C if the drying process has an efficiency of 50% (i.e., 50% heat is lost to environment through walls of facility and in the spent gas.

The woody biomass (10% MC, w.b.; 100?C) is fed at a rate of 1,000kg/h to the system. The heats of endothermic reactions are assumed the same as the heats of exothermic reactions, thus neglected for this estimation. The heat capacity of this woody biomass, 2.72 kJ/kg·?C, is assumed constant.