利用计算绝热火焰温度评估燃料-空气-稀释剂混合物的下限燃烧极限。
Evaluation of lower flammability limits of fuel-air-diluent mixtures using calculated adiabatic flame temperatures.
作者信息
Vidal M, Wong W, Rogers W J, Mannan M S
机构信息
Mary Kay O'Connor Process Safety Center, Department of Chemical Engineering, Texas A&M University, Texas, USA.
出版信息
J Hazard Mater. 2006 Mar 17;130(1-2):21-7. doi: 10.1016/j.jhazmat.2005.07.080. Epub 2005 Nov 23.
The lower flammability limit (LFL) of a fuel is the minimum composition in air over which a flame can propagate. Calculated adiabatic flame temperatures (CAFT) are a powerful tool to estimate the LFL of gas mixtures. Different CAFT values are used for the estimation of LFL. SuperChems is used by industry to perform flammability calculations under different initial conditions which depends on the selection of a threshold temperature. In this work, the CAFT at the LFL is suggested for mixtures of fuel-air and fuel-air-diluents. These CAFT can be used as the threshold values in SuperChems to calculate the LFL. This paper discusses an approach to evaluate the LFL in the presence of diluents such as N2 and CO2 by an algebraic method and by the application of SuperChems using CAFT as the basis of the calculations. The CAFT for different paraffinic and unsaturated hydrocarbons are presented as well as an average value per family of chemicals.
燃料的可燃下限（LFL）是指在空气中火焰能够传播的最低成分浓度。计算绝热火焰温度（CAFT）是估算气体混合物可燃下限的有力工具。不同的CAFT值用于可燃下限的估算。工业界使用SuperChems在不同初始条件下进行燃烧性计算，这取决于阈值温度的选择。在这项工作中，针对燃料 - 空气和燃料 - 空气 - 稀释剂混合物，提出了可燃下限处的CAFT。这些CAFT可用作SuperChems中的阈值来计算可燃下限。本文讨论了一种通过代数方法以及以CAFT为计算基础应用SuperChems来评估存在诸如N2和CO2等稀释剂时可燃下限的方法。给出了不同链烷烃和不饱和烃的CAFT以及每个化学品家族的平均值。
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