Nitrogen dilution effect on the flammability limits for hydrocarbons

文化大學機構典藏 CCUR > 理工學院 > 工學院 > 化學工程與材料工程學系暨碩士班 > 期刊論文 > Item 987654321/20525

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://irlib.pccu.edu.tw/handle/987654321/20525

题名:	Nitrogen dilution effect on the flammability limits for hydrocarbons
作者:	Wang, TC (Wang, Tzu-Chi) Chen, CC (Chen, Chan-Cheng) Liaw, HJ (Liaw, Horng-Jang) Chen, HC (Chen, Hui-Chu)
贡献者:	化材所
关键词:	Upper flammability limit Lower flammability limit Inerting Fire safety
日期:	2009
上传时间:	2011-11-30 13:27:17 (UTC+8)
摘要:	Theoretical models to predict the upper/lower flammability limits of hydrocarbons diluted with inert nitrogen gas are proposed in this study. It is found that there are linear relations between the reciprocal of the upper/lower flammability limits and the reciprocal of the molar fraction of hydrocarbon in the hydrocarbon/inert nitrogen mixture. Such linearity is examined by experimental data reported in the literature, which include the cases of methane, propane, ethylene and propylene. The R-squared values (RI) of the regression lines of the cases explored are all greater than 0.989 for upper flammability limit (UFL). The theoretical slope of the predictive line for lower flammability limit (LFL) is found to be very close to zero for all explored cases; and this result successfully explains the experimental fact that adding inert nitrogen to a flammable material has very limited effect on LFL Because limit oxygen concentration (LOC) could be taken as the intersectional point of the UFL curve and LFL curve, a LOC-based method is proposed to predict the slope of the UFL curve when experimental data of UFL are not available. This LOC-based method predicts the UFL with average error ranging from 2.17% to 5.84% and maximum error ranging from 8.58% to 12.18% for the cases explored. The predictive models for inert gas of nitrogen are also extended to the case of inert gas other than nitrogen. Through the extended models, it was found that the inert ability of an inert gas depends on its mean molar heat capacity at the adiabatic flame temperature. Theoretical calculation shows that the inert abilities of carbon dioxide, steam, nitrogen and helium are in the following order: carbon dioxide > steam > nitrogen > helium; and this sequence conforms to the existing experimental data reported in the literature. (C) 2008 Elsevier B.V. All rights reserved.
显示于类别:	[化學工程與材料工程學系暨碩士班] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	288	检视/开启

在CCUR中所有的数据项都受到原著作权保护.

数据加载中.....