烷烃高温下爆炸极限的测定

Explosion Limits Measurement of Paraffin under High Temperature

用约 2 0L的爆炸容器 ,在 2 5～ 2 10℃测定了正戊烷、正己烷、正庚烷、正辛烷、正壬烷的爆炸下限(LEL)和爆炸上限 (UEL)值。LEL值随温度的增高而减小 ,平均相关系数为 0 9893;UEL值随温度的增高而增大 ,平均相关系数为 0 994 8。

Explosion limits are important hazard index. There are many data of explosion limits at ambient temperature,but only a few data at higher temperature. In 20 liters' container, we measured the LEL and the UEL of n -pentane, n -hexane, n -heptane, n -octane, n -nonane at the temperatures ranging from 25℃ to 210℃. With increase in temperature, the value of LEL will decrease, its average correlation coefficient is 0 9893,while the value of UEL will also increase, its average correlation coefficient is 0 9948. The measured data at ambient temperature are identical with those in the literature.