汽油馏分烃化合物组分的蒸气压计算  

CALCULATION OF VAPOR PRESSURE OF PURE COMPOUNDS IN GASOLINE

作　　者：焦国凤[1] 周祥[1] 孟繁磊[1] 于博[1] 

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油炼制与化工》2017年第1期33-37,共5页Petroleum Processing and Petrochemicals

基　　金：中国石油化工股份有限公司合同项目(115037)

摘　　要：应用立方型状态方程计算气液相平衡,求取汽油馏分中烃化合物组分在任意指定温度下的饱和蒸气压,为汽油馏分的气液相平衡计算提供支持。方程求解通过编程实现,输入参数包括化合物的临界温度、临界压力和偏心因子,输出为对应温度下化合物的蒸气压。利用该方法可以计算汽油馏分中所包含的400多种烃化合物的蒸气压,比较了在37.8℃下的蒸气压计算值和实测值,结果吻合较好,轻烃化合物蒸气压的平均相对误差低于1%,汽油全馏分范围内烃化合物蒸气压的平均相对误差低于4%。The cubic equation of state was used to predict the vapor pressure of pure compounds at the specified temperature at which vaporqiquid equilibrium occurred. The equation of state was solved using the programs, in which the vapor pressure was reported when the critical properties as the critical pressure, critical temperature and acentric factor were specified. The vapor pressures of more than 400 compounds in gasoline were calculated by SRK or PR EOS. The predictions of vapor pressure of some hydrocarbon compounds at 37.8 ℃ are in good agreement with the observations. The average relative error is lower than 1% for the light compounds, and lower than 4 % for all the compounds in full range gasoline.

关 键 词：汽油馏分 烃类化合物 蒸气压计算 状态方程 

分 类 号：TE626.21[石油与天然气工程—油气加工工程]