The effects of temperature and holding times on the torrefaction of Leucaena Leucocephala (Leucaena) were elucidated via a novel isothermal decomposition approach. The torrefaction was performed in a fixed-bed reactor at temperature ranged from 200 to 300 °C for 20, 40 and 60 min. The effects of both torrefaction temperature and holding time were studied quantitatively and qualitatively by evaluating the distribution product yields and surface morphological changes. Quantitatively, the mass yield decreased with increasing temperature for all tested holding times, while the liquid and gas yields increased steadily due to the release of volatiles from the biomass decomposition. Qualitatively, significant morphological changes on Leucaena due to torrefaction were evidently captured via SEM imaging analysis. For torrefaction temperatures from 200 to 260 °C, the raw and torrefied Leucaena showed that pore evolution process had become evident. However, for torrefaction temperatures from 280 to 300 °C, the torrefied Leucaena revealed that the internal structure of torrefied Leucaena underwent pore development process. The pore development was noticeably observed for all temperatures. The values of activation energy (E_a) and pre-exponential factor (ln A) for the torrefaction were calculated based on the Coats–Redfern method for first order reaction. The values of E_a and ln A for 20, 40 and 60 min were found to be 39.75, 40.10 and 42.31 kJ/mol, and 3.92, 4.14 and 4.67. As a conclusion, the torrefaction of Leucaena from 200 to 300 °C for 20 min holding time is more reactive as compared to that at higher holding time.

通过一种新型的等温分解方法，阐明了温度和保温时间对白头翁草（Leucaena Leucocephala（Leucaena））焙干的影响。在固定床反应器中于200至300°C的温度下进行焙烧20、40和60分钟。通过评估分布产物的得率和表面形态的变化，定量和定性地研究了焙干温度和保温时间的影响。在定量上，在所有测试的保温时间内，质量产率均随温度的升高而降低，而液体和气体的产率由于生物质分解过程中释放出的挥发物而稳定增加。定性上，银合欢的形态发生重大变化通过焙烧可以明显地通过SEM成像分析捕获。对于200至260°C的烘烤温度，原始的和烘烤过的Leucaena表明孔的演化过程已经变得明显。然而，对于烘焙温度从280至300℃时，焙干银合欢透露，焙干的内部结构银合欢后行孔隙发育过程。在所有温度下均观察到孔发展。基于一级反应的Coats–Redfern方法，计算了烘焙的活化能（E _a）和指数前因子（ln A）的值。E _a的值在20分钟，40分钟和60分钟内的lnA为39.75、40.10和42.31kJ / mol，以及3.92、4.14和4.67。结论是，与在较高保温时间下相比，银合欢在200至300°C的保温时间下保持20分钟的反应性更高。