南京林业大学学报(自然科学版) ›› 2007, Vol. 31 ›› Issue (04): 65-68.doi: 10.3969/j.jssn.1000-2006.2007.04.014

• 研究论文 • 上一篇    下一篇

不同木材种类炭化率的研究

施煜庭1,CHRUSCIEL L.2,ZOULALIAN A.2,周定国1*   

  1. 1. 南京林业大学木材工业学院, 江苏 南京 210037; 2. Lermber Umr Inra 1093, Faculty of Science and Techniques of Nancy, Nancy 54506, France
  • 出版日期:2007-08-18 发布日期:2007-08-18

Study on Conversion Ratio of Different Wood Species Into Charcoal

SHI Yu-ting1, CHRUSCIEL L.2, ZOULALIAN A.2, ZHOU Ding-guo1*   

  1. 1. College of Wood Science and Technology Nanjing Forestry University, Nanjing 210037, China; 2. Lermab Umr Inra 1093, Faculty of Sciences and Techniques of Nancy, 54506, France
  • Online:2007-08-18 Published:2007-08-18

摘要: <正>利用20个样地资料,对石人山自然保护区的秦岭冷杉群落物种多样性和稳定性进行了研究,结果表明:5个群落的物种丰富度指数、多样性指数和均匀度指数均存在一定差异,且它们明显受群落类型和群落结构的影响,群落结构越复杂,物种丰富度指数和多样性指数就越大,均匀度指数就越小;5个秦岭冷杉群落各生活型的物种多样性指数间存在着一定的差异,但是差异不一定具有统计学意义;利用改进的M. Godron稳定性测定方法测得的5个群落的稳定性都极低,而且群落的稳定性和多样性之间没有明确的关系,说明群落都处于一定的动态变化中。

Abstract: The study presented hereby is the first part of a more general investigation in Europe concerning the valorization of wood wastes by activation of carbon obtained by pyrolysis of different wood species. According to the large scale’ storage of wood wastes produced by wood industry and their low economical value induced by some strong defects, six different European wood species have been tested and their ability to produce charcoal has been qualified. These sik different wood species are: ash, beech, douglas, oak, white poplar and sitka spruce. Twenty-eight pyrolysis tests have been performed at different constant temperatures (390~672℃) during two hours. Another eight tests have been performed at two different temperatures (390℃ and 440℃) with four different wood species (oak, poplar, spruce and douglas). The pyrolysis duration is one hour. Tests on cubic wood samples have permitted to determine the dimensions variations and mass loses induced by the thermal degradation of wood during its carbonization. In particular, the conversion ratio of wood material into charcoal has been determined as a function of the wood species and the pyrolysis conditions. The experimental results show that the carbonization is complete for all the species at a temperature of 500℃ and the relative mass loss after a total carbonization is constant and tends to 25%. The shrinkage is near 30% in the tangential direction, 25% in the radial direction and 20% in the longitudinal direction. After the experimental result analysis, it shows that the conversion ratios of all the wood species are similar and they have no relationship with wood species. The theoretical porosity ratio formula is ε=100-300ρ0i, the quality of charcoal product can be predicted by this formula.

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