Propylene is used for manufacturing commonly used raw materials and synthetic materials for petrochemical processes. However, it is a volatile and flammable material that poses fire and explosion risks. Nitrogen is inexpensive and can lower the propylene explosion limit because of the dilution effect when used as an inert gas. This study measures the explosion limit, minimum oxygen concentration (MOC), explosion pressure, explosion pressure rise rate, and deflagration index (K_g) values for propylene and nitrogen at 25 °C. Results showed that the lower explosion limit of the explosion range did not significantly change with an increase in pressure from 0.10 MPa to 0.25 MPa; however, the upper explosion limit increased significantly. Furthermore, the MOC decreased as pressure increased at 25 °C, while both the maximum explosion pressure and maximum explosion pressure rise rate increased, thereby increasing the explosion risk. The risk of propylene was predicted by the K_g values determined using the maximum explosion pressure rise rate and volume based on the experimental data. Therefore, through this study, we provide basic data on safety references for preventing fire and explosion accidents.

丙烯用于制造石化工艺的常用原材料和合成材料。但是，它是易挥发和易燃的材料，具有着火和爆炸危险。氮气价格便宜，并且由于用作惰性气体时具有稀释作用，因此可以降低丙烯的爆炸极限。本研究测量爆炸极限，最低氧气浓度（MOC），爆炸压力，爆炸压力上升速率和爆燃指数（K _g）在25°C下的丙烯和氮气值。结果表明，随着压力从0.10 MPa升高至0.25 MPa，爆炸范围的爆炸下限没有明显变化。但是，爆炸上限明显增加。此外，MOC随着压力在25°C的增加而降低，而最大爆炸压力和最大爆炸压力上升率均增加，从而增加了爆炸危险。根据实验数据，使用最大爆炸压力上升速率和最大体积确定的K _g值来预测丙烯的风险。因此，通过本研究，我们提供了用于预防火灾和爆炸事故的安全参考基础数据。