摘要
实沸点蒸馏原油获得燃料馏分油。采用拟静态法测定不同沸程的22种燃料馏分油在系列温度下的泡点蒸气压,用Antoine方程关联蒸气压与温度的关系。在泡点压力分别为10kPa、30kPa、50kPa、80kPa和101 325kPa时,按虚拟组分处理法计算了燃料宽馏分油中各虚拟组分的气 液相平衡常数,关联了气 液相平衡常数与虚拟组分的沸点以及相平衡温度、压力的关系,得到的表达式可以计算常压沸点范围在348 15K至623 15K间燃料宽馏分油的气 液相平衡常数,经180个数据点回归检验,平均误差为4 5%。
Bubblepoint vapor pressures along with the coefficients of Antoine equation correlation were reported for 22 hydrocarbon fuel fractions with different true boiling temperature ranges to investigate the relationship of vaporliquid phase equilibrium constants between wide and narrow fuel fractions The fuel samples were originated from crude oils with the initial atmospheric boiling temperature from 34815?K to 62315?K The vapor pressures at the range from about 8?kPa to 1013?kPa were measured by using a specially designed inclined ebulliometer with a pumplike stirrer on the basis of the principle of quasistatic method On the basis of a wide fuel fraction assumed to be composed of several pseudo components (narrow fuel fractions with the boiling temperature range of 25?K), the vaporliquid phase equilibrium constants of different pseudo components at different bubblepoint conditions were calculated The VLE constants were also correlated with the boiling temperatures of the pseudo components, the phase equilibrium temperature and pressure A generalized equation was obtained with an overall absolute average deviation of 45% from the experimental values tested by 180 datum points at the pressure range from 8?kPa to 1013?kPa and the normal boiling temperature range of fuels from 34815?K to 62315?K, which can give reasonably satisfactory results in engineering calculation
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2003年第3期271-275,共5页
Journal of Fuel Chemistry and Technology
基金
国家高技术研究发展计划863项目(863 2117)
浙江省分析测试基金(01123)
关键词
碳氢燃料
馏分
泡点
蒸气压
拟静态法
气-液相平衡常数
hydrocarbon fuel
fraction
bubble point
vapor pressure
quasi-static method
vapor-liquid phase equilibrium constant
