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.本数据集包含源自四种热带硬木树种——娑罗双（Seraya）、柳安（Kulim）、梅兰蒂木（Meranti）以及钟格木（Chengal）的木屑样品的理化性质信息。所有样品均在可控条件下经烘焙（torrefaction）预处理，操作参数包括240、270、300与330℃的反应温度，以及15、30、60分钟的停留时间；同时设置未处理的原始样品作为基线对照。本数据集收录如下检测参数：质量产率（%）、能量产率（%）、高位发热量（higher heating value, HHV，单位：MJ/kg）、高位发热量提升因子、工业分析（干基挥发分、固定碳、灰分含量）、元素分析（以质量百分比计的C、H、N、O、S含量），以及衍生得到的H/C与O/C原子比。所有实验均进行三次重复，报告值为三次实验的平均值。本数据集总计包含52条条目（4个木材树种 × 12种烘焙处理条件 + 4组原始对照样品），每条条目对应一种树种与处理条件的唯一组合，可用于系统评估烘焙处理引发的木屑样品理化性质变化。