It is known that the pyrolysis of biomass like durian skin involves several weight loss steps in a thermogravimetry (TG) curve as a result of the removal of moisture and decomposition of the major components of the biomass such as hemicelluloses, cellulose and lignin. Besides the chemical composition, thermal analysis also depends on the structure and degree of crystallinity of the natural fibres [19]. TG curve for DSF is shown in Fig. 6.