高级检索
    王雷, 徐家琛, 甄雅星, 张恒. 基于热重分析的呼和浩特主要园林树种热解动力学研究[J]. 北京林业大学学报, 2020, 42(2): 87-95. DOI: 10.12171/j.1000-1522.20190280
    引用本文: 王雷, 徐家琛, 甄雅星, 张恒. 基于热重分析的呼和浩特主要园林树种热解动力学研究[J]. 北京林业大学学报, 2020, 42(2): 87-95. DOI: 10.12171/j.1000-1522.20190280
    Wang Lei, Xu Jiachen, Zhen Yaxing, Zhang Heng. Pyrolysis kinetics of major landscape tree species in Hohhot of northern China based on thermogravimetric analysis[J]. Journal of Beijing Forestry University, 2020, 42(2): 87-95. DOI: 10.12171/j.1000-1522.20190280
    Citation: Wang Lei, Xu Jiachen, Zhen Yaxing, Zhang Heng. Pyrolysis kinetics of major landscape tree species in Hohhot of northern China based on thermogravimetric analysis[J]. Journal of Beijing Forestry University, 2020, 42(2): 87-95. DOI: 10.12171/j.1000-1522.20190280

    基于热重分析的呼和浩特主要园林树种热解动力学研究

    Pyrolysis kinetics of major landscape tree species in Hohhot of northern China based on thermogravimetric analysis

    • 摘要:
      目的树木是森林或园林城市火灾发生的物质基础,也是火灾发生不可避免的因素。园林植物合理的选择和配置是构建生物防火林带的基础工作。目前,文献中关于可燃物热解和燃烧性的研究对象多为森林可燃物,对园林树种热解动力学研究较少。为此,本文以呼和浩特市21种园林树种的树叶为研究对象,进行热解动力学研究,筛选抗火性强的园林树种,为城市生态安全以及园林植物在防火型绿地的树种配置提供理论基础。
      方法运用热重分析法以高纯度氧气为载气,空气为通气气氛,气体流量10 mL/min,升温速率60 ℃/min条件下的热失重行为进行研究,利用TG-DTG曲线分析园林树种的热解过程和热解参数。
      结果空气气氛下21种园林树种的热解均经历脱水阶段、快速热解阶段、炭化阶段。通过一级反应动力学模型Coats-Redfem积分法可以求出样品在快速热解阶段时的相应参数。
      结论各树种的树叶部位热稳定排序由低到高依次为:接骨木、紫叶小檗、重瓣榆叶梅、小叶黄杨、蒙古荚蒾、砂地柏、黄刺玫、互叶醉鱼草、柽柳、山桃、土庄绣线菊、蒙桑、紫叶碧桃、暴马丁香、华北珍珠梅、一叶萩、细裂槭、锦带花、灰栒子、沙枣、枸杞。各树种的树叶部位热解特性指数P值由大到小依次为:枸杞、灰栒子、暴马丁香、锦带花、黄刺玫、沙枣、华北珍珠梅、蒙桑、山桃、紫叶碧桃、细裂槭、柽柳、互叶醉鱼草、砂地柏、小叶黄杨、紫叶小檗、一叶萩、重瓣榆叶梅、土庄绣线菊、蒙古荚蒾、接骨木。结合热稳定性、着火温度与热解特性指数综合分析,一叶萩、细裂槭、沙枣、枸杞和锦带花具有良好的防火特性。研究结果可为园林植物防控城市森林火灾方面提供理论依据。

       

      Abstract:
      ObjectiveTrees are the material basis for forest or landscape fires, and also the inevitable factor for fires. Reasonable selection and allocation of landscape plants is the basic work of constructing biological fire-resistant forest belts. At present, the researches on pyrolysis and flammability are mostly about forest fuels, but there are few studies on pyrolysis kinetics of landscape tree species. In this paper, the pyrolysis kinetics of 21 landscape tree species in Hohhot of northern China were studied and the fire-resistant landscape tree species were chosen to provide a theoretical basis for urban ecological security and tree planting in fire-resistant green space.
      MethodThermogravimetric analysis was used to study the thermogravimetric behavior of landscape tree species under the conditions of high purity oxygen as carrier gas, air as ventilation atmosphere, gas flow rate of 10 mL/min and heating rate of 60 ℃/min. The TG-DTG curve was used to analyze the pyrolysis process and pyrolysis parameters of landscape tree species.
      ResultThe pyrolysis of 21 landscape tree species in air atmosphere experienced dehydration, rapid pyrolysis and carbonization stages. The corresponding parameters of the sample in the rapid pyrolysis stage were obtained by the Coats-Redfem integration method of the first-order reaction kinetic model.
      ConclusionThe order of thermal stability of leaf parts of each tree species from low to high was: Sambucus williamsii, Berberis xinganensis, Amygdalus triloba, Buxus sinica, Viburnum mongolicum, Sabina vulgaris, Rosa xanthina, Buddleja alternifolia, Tamarix chinensis, Amygdalus davidiana, Spiraea pubescens, Morus mongolica, Amygdalus persica, Syringa reticulata, Sorbaria kirilowii, Flueggea suffruticosa, Acer stenolobum, Weigela florida, Cotoneaster acutifolius, Elaeagnus angustifolia, Lycium chinense. The P-value of the pyrolysis characteristics index of leaf part of each tree species from large to small was: Lycium chinense, Cotoneaster acutifolius, Syringa reticulata, Weigela florida, Rosa xanthina, Elaeagnus angustifolia, Sorbaria kirilowii, Morus mongolica, Amygdalus davidiana, Amygdalus persica, Acer stenolobum, Tamarix chinensis, Buddleja alternifolia, Sabina vulgaris, Buxus sinica, Berberis xinganensis, Flueggea suffruticosa, Amygdalus triloba, Spiraea pubescens, Viburnum mongolicum, Sambucus williamsii. Based on the comprehensive analysis of thermal stability, ignition temperature and pyrolysis characteristics index,Flueggea suffruticosa, Acer stenolobum, Elaeagnus angustifolia, Lycium chinense and Weigela florida are strong fire-resistant landscape tree species. The results can provide a theoretical basis for the prevention and control of urban forest fires by landscape tree species.

       

    /

    返回文章
    返回