Efficient Fuel Pretreatment: Simultaneous Torrefaction and Grinding of Biomass
Efficient Fuel Pretreatment: Simultaneous Torrefaction and Grinding of Biomass
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高效燃料预处理：同时烘焙和研磨生物质
DOI：
10.1021/ef401787q
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发表时间：
2013
期刊：
影响因子：
5.3
通讯作者：
K. Dam‐Johansen
中科院分区：
文献类型：
--
作者：
S. Saleh;B. B. Hansen;P. Jensen;K. Dam‐Johansen
在一个反应器中组合生物质的烘焙和研磨可能是一种有吸引力的燃料预处理方法。结合实验室烘焙和球磨机反应器已建成的温度和停留时间的影响，丹麦小麦秸秆，云杉片，松木片的产品产量和粒度减小的研究。在初步实验的基础上，评价了反应器质量负荷、气体流量和研磨球尺寸和材料的影响，开发了标准实验程序。通过d50的相对变化评价了烘焙过程的粒度减小能力，并将该方法与Hardgrove可磨性指数（HGI）进行了比较，显示出相当相似的结果。对于在270-330 °C下烘焙的稻草和云杉片，已经观察到烘焙行为的显著差异。稻草经90 min烘干后的质量损失率（27-60 wt %）和相对粒径减小率（59-95%）均高于云杉（10 - 20 wt %）。
Combining torrefaction and grinding of biomass in one reactor may be an attractive fuel pretreatment process. A combined laboratory torrefaction and ball mill reactor has been constructed for studies of the influence of temperature and residence time on the product yields and particle size reductions of Danish wheat straw, spruce chips, and pine chips. On the basis of initial experiments, which evaluated the influence of reactor mass loading, gas flow, and grinding ball size and material, a standard experimental procedure was developed. The particle size reduction capability of the torrefaction process has been evaluated by the relative change in d50, and this method was compared to the Hardgrove grindability index (HGI), showing reasonably similar results. Significant differences in torrefaction behavior have been observed for straw and spruce chips torrefied at 270–330 °C. Torrefaction of straw for 90 min yielded a higher mass loss (27–60 wt %) and relative size reduction (59–95%) compared with spruce (...