Estimation of the lower flammability limit of organic compounds as a function of temperature.
Estimation of the lower flammability limit of organic compounds as a function of temperature.
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DOI：
10.1016/j.jhazmat.2010.11.039
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发表时间：
2011-02
影响因子：
13.6
通讯作者：
J. Rowley;Richard L. Rowley;W. Wilding
中科院分区：
文献类型：
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作者：
J. Rowley;Richard L. Rowley;W. Wilding
提出了一种估算一般有机化合物燃烧下限的新方法。气体的LFL预计为298K，固体和液体的温度下限由结构贡献和燃料的理想气体生成热决定。与500多个实验数据点的平均绝对偏差为10.7%。在以前的研究中，广泛使用的修正的Burgess-Wheeler定律在大直径容器中确定时，被证明低估了温度对可燃下限的影响。提出了修正的Burgess-Wheeler定律的一个改进版本，它更准确地描述了在大直径容器中测定的LFL数据的温度相关性。当使用该模型和所提出的结构贡献方法相结合来估计升温时的LFL时，与在ASHRAE式仪器中测定的17种有机化合物的65个数据点相比，平均绝对偏差为3.3%。
A new method of estimating the lower flammability limit (LFL) of general organic compounds is presented. The LFL is predicted at 298K for gases and the lower temperature limit for solids and liquids from structural contributions and the ideal gas heat of formation of the fuel. The average absolute deviation from more than 500 experimental data points is 10.7%. In a previous study, the widely used modified Burgess–Wheeler law was shown to underestimate the effect of temperature on the lower flammability limit when determined in a large-diameter vessel. An improved version of the modified Burgess–Wheeler law is presented that represents the temperature dependence of LFL data determined in large-diameter vessels more accurately. When the LFL is estimated at increased temperatures using a combination of this model and the proposed structural-contribution method, an average absolute deviation of 3.3% is returned when compared with 65 data points for 17 organic compounds determined in an ASHRAE-style apparatus.