Torrefaction is a promising pre-treatment for improving the fuel quality of biomass and the process undergoes at temperature range of 200-300°C, under an inert environment. This study aimed at investigating the influence of thermal pretreatment temperatures and time through dry and chemical treated torrefaction of wood biomass (Eucalyptus camaldulensis) (on thermal analysis, physical and chemical properties. The wood particle samples were consecutively heated at three different torrefaction temperatures of 250, 275 and 300 0 C with three different residence times 20, 40 and 60 minutes under nitrogen atmosphere and a heating rate of 10 o C/min. Then after, both treated and raw samples were characterized for thermal analysis by thermogravimetric analyzer (TGA), physical properties (color, hydrophobic property, weight, density) and chemical property (proximate, elemental composition analysis and heating value). The study revealed that the higher heating values (HHV) increased from the initial average of 21.51MJ kg−1 to 24.545 MJ kg−1 and to 26.01 MJ kg−1 in the torrefied samples of dry and chemical treated torrefaction process respectively. The carbon content increased from 46.22% to 62.83% and to 65.77% dry and chemical treated process. In addition to this, the energy density was enhanced by 14.09% during dry and by 20.91% while chemical treated torrefaction. From the thermo gravimetric analysis TGA, the torrefied E. wood residue samples showed more thermal stability with a shift of the mass loss peaks to higher temperatures and a higher residual mass at 450 ◦C of 39.36% chemical treated and 35.3% dry treated, in comparison to 28.55% of the untreated samples. Based on the findings of this study the maximum value of HHV was obtained at temperature of 300 o C and 60 min on both treatment cases. And it could be suggested for an effective and proper torrefaction process to recycle the logging residual biomasses.