Carbon Dioxide Dilution Effect on Lower Flammablility Limits for Flammable Material Containing Carbon, Hydrogen, Nitrogen and Oxygen Atoms
The inert ability on lower flammability limit (LFL) is very limited when the inert gas is the nitrogen; however, it is beyond the case that the carbon dioxide is chosen as the inert gas. Thus, it seems important to know the change in LFL when the carbon dioxide is added to a flammable material. A theoretical model to predict the LFL for dilution a flammable material with the carbon dioxide is proposed based on the following three assumptions: (1) the combustible compounds react completely at LFL; (2) the stoichiometric relation of a combustion reaction occurring at LFL does not change by the presence of inert gas; (3) the adiabatic temperature rises are the same for all limit mixtures at LFL. Based on these assumptions, a predictive linear model for the LFL of a mixture composed of the flammable materials and carbon dioxide is then derived analytically. The flammable materials considered in this work arc the organic compounds consist of the carbon, hydrogen, nitrogen and oxygen atoms. The experimental data of cases which include ethers, esters, alcohols, ketones, and ammonia are used to examine the proposed model. From regression analysis, it is found that the coefficients of determination (R2) are all larger than 0.977 in the cases studied. Therefore, the experimental result positively supported the proposed theoretical results.
lower flammability limits inerting predictive linear model
WANG Tzuchi CHEN Chancheng LIAW Horngjang CHEN Huichu
Department of Chemical Engineering,Chinese Culture University,Taipei 111,Taiwan,China Department of Occupational Safety and Health,China Medical University,Taichung 404,Taiwan,China
国际会议
The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)
北京
英文
1266-1272
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）