PR状态方程推算液体多种热力学性质  

PKEDICTIONS OF THERMODYNAMIC PROPERTIES OF SATUKATED LIQUIDS BY PENG-ROBINSON EQUATION OF STATE

作　　者：董军航[1] 徐南平[1] 王延儒[1] 时钧[1] 

机构地区：[1]南京化工学院化学工程系

出　　处：《南京化工学院学报》1995年第3期1-7,共7页

基　　金：中国石化总公司资助项目

摘　　要：在汽液平衡区域对ｐｅｎｇ－Ｒｏｂｉｎｓｏｎ立方型状态方程（ＰＲＥｏＳ）及其参数α（Ｔｒ）作了数学分析。结果说明，ＰＲＥＯＳ由于本身的局限而难以兼顾对两相密度、焓值和热容的推算精度。函数α（Ｔｒ）可以用不同的方法得到，当α（Ｔｒ）采用热容数据拟合得到时，则可以较好地同时计算液体的蒸发焓（△Ｈ＿ｖ）和热容偏差（△Ｃ＿ｐ）。本文对Ｃ＿２Ｈ＿６和ＨＣｌ作了举例计算。篈n analysis was made on the Peng-Robinson cubic equation of state（PR EOS）and its pa-rameter a（Tr）in the vapor-liquid equilibrium region. The results showed that the PR EOS with onlyone temperature dependent parameter，is mathematically insufficient to simultaneously predict the va-por and liquid densities，depart ure enthalpies and resid ual heat capacities at constant pressure withgood accuracy. The temperature function a（Tr）could be determined by different methods，and satis-factory results could be obtained in the simultaneous prediction of latent heat and heat capacity whena（tr）was determined by using experimental data of specific heat capacity．Testing calculations weremade fot C_2H_6 and HCl in this work.

关 键 词：液体 计算 立方型 状态方程 热力学 

分 类 号：TQ013.1[化学工程]