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Correlations towards prediction of petroleum fraction viscosities: a semi-theoretical approach

机译：预测石油馏分粘度的相关性：一种半理论方法

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摘要

A new semi-theoretical method based on Enskog's hard sphere theory for dense fluids and the principle of corresponding states is presented for predicting viscosity of petroleum fractions (C_5--C_l5) at 40deg.C under atmospheric pressure. Viscosities, densities, normal boiling points and quantitative hydrocarbon analyses of 42 petroleum fractions were experimentally determined. The critical properties and the average molecular weights of the petroleum fractions were calculated by the Riazi Daubert equation. The predictions were compared with expenmental data. Satisfactory results were obtained. The average error of the 42 petroleum fractions could be decreased to below 3.4/100 utilising only density and average boiling point as input parameters. The addition of hydrocarbon group weight fractions as additional input parameters decrease the average error to around 2.6/100. When acyclic rich and cyclic rich samples are handled separately, the average errors are below 2/100.
机译：提出了一种基于恩斯科格硬球理论的稠油流体半理论和相应状态原理的新半理论方法，用于预测大气压下40℃下石油馏分（C_5--C_l5）的粘度。实验确定了42种石油馏分的粘度，密度，正沸点和定量烃分析。石油馏分的临界性质和平均分子量通过Riazi Daubert方程计算。将预测结果与实验数据进行比较。获得满意的结果。仅使用密度和平均沸点作为输入参数，就可以将42种石油馏分的平均误差降低到3.4 / 100以下。烃基重量分数作为附加输入参数的添加将平均误差降低到约2.6 / 100。当分别处理非循环富集样本和循环富集样本时，平均误差低于2/100。

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