Dept. of Forest Products and Technology, College of Agriculture & Life Sciences, Chonnam National University, Gwang-ju 500-757, Republic of Korea.
Bioresour Technol. 2012 Jul;116:120-5. doi: 10.1016/j.biortech.2012.04.033. Epub 2012 Apr 21.
We investigated the characteristics of torrefied yellow poplar (Liriodendron tulipifera) depending on reaction time (30 min) and temperature (240-280 °C). The thermogravimetric, grindability and calorific value of torrefied biomass were analyzed. As the torrefaction temperature increased, the carbon content of torrefied biomass increased from 49.50% to 54.42%, while the hydrogen and oxygen contents decreased from 6.09% to 5.65% and 28.71% to 26.61%, respectively. The highest calorific value was 1233 kJ/kg when torrefaction was performed at 280 °C for 30 min. An overall increase in energy density and decrease in mass and energy yield was observed with the increase in torrefaction temperature. The analysis of thermal decomposition demonstrated that the hemicelluloses contained in torrefied biomass decreased with increasing torrefaction temperature, whereas cellulose and lignin were only slightly affected. The grindability of torrefied biomass was significantly improved when torrefaction was performed at high temperature. Torrefaction of yellow poplar improved the chemical and physical fuel properties of the biomass.
我们研究了热解杨木（Liriodendron tulipifera）的特性，取决于反应时间（30 分钟）和温度（240-280°C）。分析了热解生物质的热重、可磨性和热值。随着热解温度的升高，热解生物质的碳含量从 49.50%增加到 54.42%，而氢和氧含量从 6.09%减少到 5.65%和 28.71%减少到 26.61%。当在 280°C 下进行 30 分钟的热解时，最高热值为 1233 kJ/kg。随着热解温度的升高，观察到能量密度的总体增加、质量和能量产率的降低。热分解分析表明，随着热解温度的升高，热解生物质中的半纤维素含量减少，而纤维素和木质素仅受到轻微影响。在高温下进行热解时，热解生物质的可磨性得到显著改善。杨木的热解改善了生物质的化学和物理燃料特性。
