Comparative analysis of the inert effects of N2 and CO2 on LPG explosion

In order to investigate the effect of inert gas on the suppression efficiency of liquefied petroleum gas (LPG), the explosion limit and pressure parameters of LPG with different volume fraction of N2 and CO2 were tested through the explosive limit measurement device of combustible gas and the visual spherical explosion comprehensive experimental system. The results obtained through the comparison and analysis showed that both N2 and CO2 will reduce the explosion limit of LPG and have a greater influence on the upper limit of explosion; when the critical point of explosion suppression was reached, the volume fraction of CO2 (34%) was less than that of N2 (43%), and the formula for calculating the dangerous explosion area was given. Under the same conditions, CO2 has greater suppression effects on the explosion pressure and the rate of increase of the maximum explosion pressure of LPG than N2, reduces the explosion risk and the maximum explosion index more effectively, and makes the occurrence time of the most violent degree of explosion advance and the explosion danger time reduce. After comprehensive comparison, it was found that the explosion suppression performance of CO2 to LPG was better than that of N2. © 2019, Chemical Industry Press. All right reserved.