Multi-component Volatile Petroleum Products,

Kerosene is widely used both in our daily life and industrial manufacture. It combusts easily and even explodes in a certain circumstance when its vapour mixes with the air. It is very meaningful to abtain its volatility parameters and rules in the research of its vapor's explosion conditions. As a result, effective measures could be taken to avoid such explosion accidents. The paper started the research on 5~# kerosene as well as its saturated vapor pressures in the temperature among 10℃-80℃and their relationship with the temperature. Three methods were used in this paper, such as the static method, Reid method and the improved Reid method. The experiments showed that it is difficult for the vapor and liquid phase to equilibrium and the temperature-vapor pressure curve is not so ideal in the static method; In the Reid method based on the GB/T 8017, we can make the vapor/liquid phase equilibrium easily but it contained lots of operations which will bring some data errors in the test and the errors were more serious in higher temperatures. In the end, we turned to the improved Reid method that introduces the blank experiment as the correcting and calibration method, then the kerosene vapor pressures were measured and datas were corrected. As a result, recurring and exact vapor pressure datas were abtained from the direct experiment and indirect caculations. And the scientific linear curve between the temperature and saturated vapor pressure was formed, which is similar to the pure liquid. So improved Reid method is more reasonable to measure the multi-component oil's saturated vapor pressures in different temperatures. Different measuring methods resulted in different saturated vapor pressures because of the complicated and unstable multi-compounds in kerosene. And the datas are also sensitive to the environmental factors. Last but not the least, the volum concentrations of oil vapor gas above the liquid phase in different temperatures were tested by the method of gas chromatography. And we managed to get its regularity between temperature and volatility capability that is similar to the trend resulted from improved Reid method. It is proved that the method of gas chromatography is an effective way to study the volatility capacity of multi-component kerosene, both by the test method and its results.