کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
585858 | 877927 | 2006 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The upper explosion limit of lower alkanes and alkenes in air at elevated pressures and temperatures The upper explosion limit of lower alkanes and alkenes in air at elevated pressures and temperatures](/preview/png/585858.png)
The upper explosion limit (UEL) of ethane–air, propane–air, n-butane–air, ethylene–air and propylene–air mixtures is determined experimentally at initial pressures up to 30 bar and temperatures up to 250 °C. The experiments are performed in a closed spherical vessel with an internal diameter of 200 mm. The mixtures are ignited by fusing a coiled tungsten wire, placed at the centre of the vessel, by electric current. Flame propagation is said to have taken place if there is a pressure rise of at least 1% of the initial pressure after ignition of the mixture. In the pressure–temperature range investigated, a linear dependence of UEL on temperature and a bilinear dependence on pressure are found except in the vicinity of the auto-ignition range. A comparison of the UEL data of the lower alkanes shows that the UEL expressed as equivalence ratio (the actual fuel/air ratio divided by the stoichiometric fuel/air ratio) increases with increasing carbon number in the homologous series of alkanes.
Journal: Journal of Hazardous Materials - Volume 128, Issue 1, 16 January 2006, Pages 1–9