摘要
通过回归C1～C16 16种饱和烷烃的饱和蒸气压值,提出了低对比温度下PRSV方程的新温度函数关联式.新关联式只与温度和偏心因子有关,不需要物质的特征参数,是一种普遍化形式.通过对53种未参加回归的不饱和烃与极性物质饱和蒸气压的计算表明,新温度函数关联式较原PRSV温度函数在低对比温度下计算精度有明显提高.通过计算C1～C16饱和烷烃的饱和液体密度表明,改进的温度函数保持了PR和PRSV方程预测饱和液体密度的精度.
Through regression of saturated vapor pressure of C1-C16 ,a new alpha function for PRSV equation at low relative temperatures was proposed. The new equation correlated with temperature and acentric factoronly. Characteristic parameter of each pure compound was not required. It is a more general form of PRSV equation. Comparing with PRSV equation, especially at low relative temperatures, the calculation results of saturated vapor pressure of 30 pure substances using a new alpha function showed improved precision. Concerning saturated liquid density of C1-C16,the use of new alpha function retained the precision of PRSV equation.
出处
《石油化工》
CAS
CSCD
北大核心
2004年第10期951-955,共5页
Petrochemical Technology
基金
国家创新基金资助项目(02C26213710653)。
关键词
温度函数
PRSV方程
状态方程
关联式
<Keyword>temperature function
PRSV equation
equation of state
correlation formula
