Fig. 1 shows a TGA-DTG curves of
OPT and EFB at a heating rate of 50 °C/min for particle size of < 0.25 mm (dp1). In general, the pyrolysis
of any biomass can be divided into three phases which are drying and evaporation of light components
(phase I), devolatilization of hemicellulose and cellulose (phase II) and decomposition of lignin (phase
III). Phase I occurs at temperature below 150°C, phase II starts from 150o
C to 450°C and finally phase III
is attained at temperature above 450°C.