欢迎访问林业科学,今天是

林业科学 ›› 2012, Vol. 48 ›› Issue (10): 101-108.doi: 10.11707/j.1001-7488.20121016

• 论文 • 上一篇    下一篇

黑龙江帽儿山12种草本可燃物的慢速升温热解特性

金森, 宋彦彦, 孙才英   

  1. 东北林业大学 哈尔滨 150040
  • 收稿日期:2011-09-29 修回日期:2011-12-16 出版日期:2012-10-25 发布日期:2012-10-25
  • 通讯作者: 孙才英

Pyrolysis Characteristics under Slowly Rising Temperature of 12 Herbaceous Species in Maoershan in Heilongjiang Province

Jin Sen, Song Yanyan, Sun Caiying   

  1. Northeast Forestry University Harbin 150040
  • Received:2011-09-29 Revised:2011-12-16 Online:2012-10-25 Published:2012-10-25

摘要:

以黑龙江帽儿山12种草本可燃物为研究对象,用热重分析法对其升温速率为10 ℃·min-1的慢速热解过程进行研究,利用TG-DTG曲线分析它们的热解特性,得到了纤维素和木质素的热解与温度、失重量以及失重速率的关系。结果表明:空气气氛下12种草本可燃物的热解均经历3个主要阶段,根据3个阶段的平均失重速率和初始分解温度,可对12种草本可燃物在不同燃烧阶段的燃烧性进行评价。这3个阶段是:1)失水阶段,温度范围是室温~120 ℃,根据该阶段的平均失水速率和初始热解温度判断,猴腿蹄盖蕨、芍药和耧斗菜最易燃;2)综纤维素热分解阶段,温度范围是100~370 ℃,根据综纤维素的平均分解速率判断,耧斗菜的有焰燃烧最剧烈;3)木素热分解阶段,温度范围370~500 ℃,根据木素的平均分解速率判断,宽叶山蒿和蚊子草无焰燃烧最剧烈。

关键词: 草本, 热解, 可燃物, 热重, 燃烧性

Abstract:

Pyrolysis processes of 12 herbaceous species grown in Maoershan in Heilongjiang Province were studied by the Thermogravimetric analysis with a temperature rising rate of 10 ℃·min-1. The TG-DTG curves of these fuels were used to analyze their pyrolysis characteristics. The results showed that the pyrolysis processes of the 12 species could be separated into three phases. Flammability of the 12 species was evaluated by the average decomposition rate of the three phases and the starting pyrolysis temperature. The three phases are: 1) dehydration when temperature is ambient one to 120 ℃. Athyrium multidentatum, Paeonia lactiflora, and Aquilegia vulgaris are the most flammable species when evaluated by the mean dehydration rate and the starting pyrolysis temperature. 2) Pyrolysis process of holocellulose under 100-370 ℃, in which 41%-51% of its original mass losses. In terms of the mean pyrolysis rate of holocellulose, Aquilegia vulgaris burns most severely for flammable combustion. 3) Decomposition of lignin,which occurs under 370-500 ℃ and losses 31%-37% of the mass. Artemisia stolonifera and Filipendula palmata burns most severely in smoldering phase evaluated by the mean decomposition rate of lignin.

Key words: herbaceous, pyrolysis, fuel, thermogravimetric analysis, flammability

中图分类号: