Effects and mechanism of ball milling on torrefaction of pine sawdust
Effects and mechanism of ball milling on torrefaction of pine sawdust
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DOI：
10.1016/j.biortech.2016.04.062
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发表时间：
2016-08-01
影响因子：
11.4
通讯作者：
Wang, Decheng
中科院分区：
文献类型：
--
作者：
Gong, Chunxiao;Huang, Jing;Wang, Decheng
研究了球磨对烘烤过程的影响及其机理。球磨和锤磨(屏幕尺寸为1 mm)松木锯末样品在三个温度(230、260和290摄氏度)和两个持续时间(30和60分钟)下进行加热处理，以研究它们的加热行为和物理化学性质。结果表明，在相同的烘干条件下，球磨松木木屑的碳含量和固定碳含量高于锤磨松木木屑，氢和氧含量低于锤磨松木木屑。球磨松木木屑比锤磨松木木屑产生更低的质量和能量，但热值更高。球磨破坏了纤维素的结晶结构，从而降低了半纤维素、纤维素和木质素的热稳定性，导致它们在相对较低的温度下降解。总之，用球磨和烘干相结合的方法对生物质进行预处理，有可能生产一种替代煤炭的燃料。(C)爱思唯尔有限公司出版的2016年。
The effects and mechanism of ball milling on the torrefaction process were studied. Ball- and hammer-milled (screen size 1 mm) pine sawdust samples were torrefied at three temperatures (230, 260, and 290 degrees C) and two durations (30 and 60 min) to investigate into their torrefaction behavior and physicochemical properties. The results showed that, under identical torrefaction conditions, torrefied ball-milled pine sawdust had a higher carbon content and fixed carbon, and lower hydrogen and oxygen contents than torrefied hammer-milled pine sawdust. Torrefied ball-milled pine sawdust produced lower mass and energy yields, but higher heating values than torrefied hammer-milled pine sawdust. Ball milling destroyed the crystalline structure of cellulose and thus reduced the thermal stability of hemicellulose, cellulose, and lignin, causing them to degrade at relatively lower temperatures. In conclusion, bio-mass pretreated with a combination of ball milling and torrefaction has the potential to produce an alternative fuel to coal. (C) 2016 Published by Elsevier Ltd.