Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan, ROC.
Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan, ROC.
Bioresour Technol. 2015 Jun;185:285-93. doi: 10.1016/j.biortech.2015.02.095. Epub 2015 Feb 28.
The torrefaction characteristics and energy utilization of microalga Chlamydomonas sp. JSC4 (C. sp. JSC4) residue under the combination of temperature and duration are studied by examining contour maps. The torrefaction temperature on the contour line of solid yield has a trend to linearly decrease with increasing duration. An index of relative energy efficiency (REE) is introduced to identify the performance of energy utilization for upgrading biomass. For a fixed energy yield, the optimal operation can be found to maximize the heating value of the biomass and minimize the solid yield. The energy utilization under the combination of a high temperature and a short duration is more efficient than that of a low temperature and a long duration. The maximum REE along the contour line of energy yield is always exhibited at the highest temperature (300°C) where the energy efficiency can be enlarged by a factor of at least 2.36.
通过考察轮廓图，研究了温度和时间组合下微藻 Chlamydomonas sp. JSC4（C. sp. JSC4）残余物的热解特性和能量利用。在固体产率轮廓线上，热解温度随着时间的延长呈线性下降趋势。引入相对能量效率（REE）指数来识别生物质升级过程中能量利用的性能。对于固定的能量产率，可以找到最佳操作，以最大化生物质的热值并最小化固体产率。高温短时间组合下的能量利用效率高于低温长时间组合。在能量产率轮廓线上，REE 的最大值始终出现在最高温度（300°C），在该温度下，能量效率可以提高至少 2.36 倍。
