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在温度为400～460℃、压力为50～150MPa的条件下,用金管—高压釜系统对nC22进行了恒温24h热解。结果显示:当压力一定时,甲烷和重烃气(C2-5)的产率均随热解温度增高而增加。而当温度一定时,压力对甲烷和重烃气产率的影响却随系统的热解温度变化存在较大差异,其中温度在400℃时,气态烃产率随压力的增加而降低;在温度为420℃时,压力对气态烃产率的影响轻微;在温度为420℃以上时,压力越大气态烃的产率增加越显著。在讨论了温度、压力对原油裂解的影响后认为,体系的相态是裂解成气实验中值得重视的一个问题。
Under the condition of temperature of 400 ~ 460 ℃ and pressure of 50 ~ 150MPa, the nC22 was pyrolyzed 24h by gold tube - autoclave system. The results show that when the pressure is constant, the yield of methane and heavy hydrocarbon gas (C2-5) increases with the increase of pyrolysis temperature. However, when the temperature is constant, the influence of pressure on methane and heavy hydrocarbon gas production varies greatly with the pyrolysis temperature of the system. When the temperature is 400 ℃, the yield of gaseous hydrocarbon decreases with the increase of pressure. When the temperature is 420 ℃, the effect of pressure on the yield of gaseous hydrocarbons is slight. When the temperature is above 420 ℃, the higher the pressure, the more obvious the increase of the yield of gaseous hydrocarbons. After discussing the effect of temperature and pressure on the cracking of crude oil, it is considered that the phase state of the system is a problem that deserves attention in the experiment of cracking into gas.