基于锥形量热仪测试的树叶燃烧碳排放研究

发布时间：2018-01-02 09:51

  本文关键词：基于锥形量热仪测试的树叶燃烧碳排放研究　出处：《燃烧科学与技术》2016年04期 　论文类型：期刊论文

  更多相关文章： 森林火灾 碳排放 碳转化率 排放比 锥形量热仪测试

【摘要】：运用锥形量热仪模拟开放环境中植物样品在不同火灾场合的燃烧场景,检测其燃烧过程中CO和CO_2排放量,进而确定其碳转化率和排放比.实验样品为针阔叶树种叶片共8种;辐射热流强度分别为35,k W/m2、55,k W/m2、70,k W/m2和85,k W/m2.测试结果表明,在设定的装载量范围内,样品碳转化率基本不受空间分布密度的影响,并呈现较好的数据可重复性,由此确认了检测方法的可靠性.因辐射热流强度和样品含水量的差异,树叶样品的CO和CO_2的转化率范围分别为0.01~0.10和0.05~0.85,且随着辐射热流强度增大而显著提升;新鲜样品含水量的降低促使其由阴燃向明火转变,明火燃烧则会促进CO和CO_2的生成,这与开放环境中样品热解产物燃烧反应的效率以及碳烟形成有关.
[Abstract]:A cone calorimeter was used to simulate the burning scenes of plant samples in open environment in different fire situations and to detect the CO and CO_2 emissions during combustion. Then the carbon conversion rate and emission ratio were determined. The radiation heat flux is 35 kW / m 2, 55 W / m 2, 70 k W / m 2 and 85 K W / m 2, respectively. The test results show that the radiation heat flux is within the given loading range. The carbon conversion rate of the sample is not affected by the spatial distribution density and has good repeatability. The reliability of the method is confirmed because of the difference of the radiation heat flux intensity and the water content of the sample. The conversion ranges of CO and CO_2 in leaf samples were 0.01g 0.10 and 0.05g 0.85, respectively, and increased significantly with the increase of radiation heat flux. The decrease of water content in fresh samples leads to the transition from smoldering to open fire, which will promote the formation of CO and CO_2, which is related to the combustion efficiency of pyrolysis products and the formation of soot in open environment.
【作者单位】： 中国科学技术大学火灾科学国家重点实验室;广东省林业科学研究院;
【基金】：广东省科技创新基金资助项目(2012KJCX018-02)
【分类号】：TK16
【正文快照】： 森林火灾中排放的CO2等气体已被确认为大气中温室效应气体主要来源之一[1].目前,估算碳排放量的方法均由生物质储量出发,通过判断燃烧消耗量,再结合CO和CO2排放因子(或与之相关的排放比),来计算特定林区已有或潜在森林火灾的碳排放量[2-5].其中CO与CO2排放因子是森林火灾碳排，

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