Pressure dependence of the auto-ignition temperature of methane/air mixtures

被引：42

作者：

Caron, M

Goethals, M

De Smedt, G

Berghmans, J

Vliegen, S

Van't Oost, E

van den Aarssen, A

机构：

[1] Katholieke Univ Leuven, Dept Mech Engn, B-3001 Louvain, Belgium

[2] DSM Res, IS MVR, NL-6160 MD Geleen, Netherlands

来源：

JOURNAL OF HAZARDOUS MATERIALS | 1999年 / 65卷 / 03期

关键词：

safety; auto-ignition; explosion limits; methane;

D O I：

10.1016/S0304-3894(99)00004-7

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The results of experiments conducted to determine the auto-ignition temperature (AIT) and the cool flame temperature (CFT) of methane/air mixtures at elevated pressures (200-4700 kPa) and for concentrations from 30 up to 83 vol.% are reported. The experiments were performed in a closed spherical vessel with a volume of 8 dm(3). It is shown that methane/air mixtures can react spontaneously for methane concentrations far outside the flammability limits. Cool flames are observed for methane concentrations higher than 40 vol.%. The AIT and CFT are strongly pressure-dependent and decrease with increasing pressures. A Semenov correlation is developed for the CFT as a function of the pressure. The upper explosion limit (UEL) of methane/air mixtures at elevated pressure and temperature is linked with the CFT. It is shown that for certain conditions of pressure and temperature, the flammability range increases considerably even for a small temperature rise. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：233 / 244

页数：12