Flammability limits estimation for fuel-air-diluent mixtures tested in a constant volume vessel

被引:20
|
作者
Liaw, Horng-Jang [1 ]
Chen, Chan-Cheng [1 ]
Lin, Nung-Kai [2 ]
Shu, Chi-Min [2 ]
Shen, Shang-Yi [2 ]
机构
[1] Natl Kaohsiung First Univ Sci & Technol, Dept Safety Hlth & Environm Engn, 1 Univ Rd, Kaohsiung, Taiwan
[2] Natl Yunlin Univ Sci & Technol, Dept Safety Hlth & Environm Engn, 123 Univ Rd,Sect 3, Touliu, Yunlin, Taiwan
关键词
Energy balance equation; Flammability limits; Inert gas; Flame temperature; Combustion products; Fourier Transform Infrared Spectroscopy (FTIR); CARBON-DIOXIDE; BURNING VELOCITIES; METHYL FORMATE; FLAMES; METHANOL; REEXAMINATION; HYDROCARBONS; TEMPERATURE; PRESSURE; FORMULA;
D O I
10.1016/j.psep.2016.01.006
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A model for estimating the flammability envelope of mixtures containing inert gases for a constant volume system was derived based on the energy balance equation and thermal radiation loss. The combustion products along the flammability boundaries were analyzed by Fourier Transform Infrared Spectroscopy (FTIR) to verify the assumptions of the proposed model. The model was validated for acetone, methyl formate, methanol, and isopropanol with either steam or nitrogen as the inert gas. The heat loss effects on the estimated flammability envelopes were small. The predicted lower flammability limits (LFLs) closely matched the measured limits, excluding those at the region approaching the limiting oxygen concentration (LOC). The estimated upper flammability limits also agreed well with the measured limits. The FTIR spectra indicated that the increase in the LFL around the LOC is attributed to the existence of unburned fuel, not the formation of CO as previously reported. (C) 2016 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:150 / 162
页数:13
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