基团贡献法预测石油馏分热力学性质的探索  

EXPLORATION OF PREDICTING THERMODYNAMIC PROPERTIES OF PETROLEUM FRACTIONS BY GROUP CONTRIBUTION METHOD

作　　者：王从岗[1] 陈泽辉[1] 富嘉文[1] 寿德清[1] 

机构地区：[1]石油大学炼制系

出　　处：《石油炼制》1993年第5期57-64,共8页

摘　　要：作者采用模型分子法、n-d-M—LP法和将以上两种方法相结合的联合法确定石油馏分的基因构成。选用Lyderson基团贡献法计算临界温度T_C与临界压力P_C,并与43组国产石油直馏馏分油的实测值相比较。结果表明联合法的预测效果最好。T_C和P_C的平均相对偏差分别为1.36～1.39％和6.70～6.80％,能满足工程计算之用。此外,文中还简要介绍了国内外应用UNIFAC-VLE和CORGC-EOS两个基团贡献模型预测石油馏分气-液平衡的情况。The critical temperature Tc and critical pressure pc of petroleum fractions are calculated by Lyderson group contribution method. Three defferent approaches are ap- plied to determine the group composition of a cut, i. e., (1)Model Molecules Method, (2) n-d-M-LP Method, (3)Combined method which combines (1)and (2). The computa- tion results are compared with 43 sets of experimental data of Chinese virgin petroleum frac- tions. It shows that the combined Method gives the best prediction, with the average relative errors being 1.36～1.39% for Tc and 6.7～6.80% for pc. This result is acceptable for engi neering design calculation. In addtion,the works on vapour-liquid equilibrium predictions for petroleum fractions by UNIFAC model and CORGC-EOS both in China and abroad are briefly reviewed.

关 键 词：石油馏分 汽液平衡 基团贡献法 

分 类 号：TE622.5[石油与天然气工程—油气加工工程]