Data Physicochemical Raw and Torrefied Wood Sawdust

This dataset contains information on the physicochemical properties of wood sawdust samples derived from four tropical hardwood species namely Seraya, Kulim, Meranti, and Chengal. The samples underwent torrefaction as pretreatment under controlled conditions. Operating conditions included temperatures of 240, 270, 300 and 330 °C and residence times of 15, 30, and 60 minutes. Raw samples were also included as baselines. The dataset reports the following parameters which are mass yield (%), energy yield (%), higher heating value (HHV, MJ/kg), enhancement factor of HHV, proximate analysis (volatile matter, fixed carbon, ash content on a dry basis), ultimate analysis (C, H, N, O, S in wt%), and derived H/C and O/C atomic ratios. All experiments were performed in triplicate, and values reported represent averages. In total, the dataset comprises 52 entries (4 wood species × 12 torrefaction conditions + 4 raw references). Each entry corresponds to a unique combination of species and treatment condition enabling systematic evaluation of physicochemical changes due to torrefaction.