Prediction of the Structural Group Compositions of Lube Base Oil
The physical properties of 11 lube base oils,namely the atomic ratio of carbon to hydrogen,density,viscosity,refractive index and average relative molecular mass,were determined and their structural group compositions were studied by different analysis methods.Models for predicting the aromatic carbon rates (CA),naphthenic carbon rates(CN) and alkyl carbon rates(CP) were established using the physical properties and calculated model characterization factors.The structural group compositions of the lube base oils were calculated by the models with CA,CN and CP,and the results were compared with those obtained by the n-d-M method and improved B-L method.The analysis of the experimental data showed that the results obtained by the predicting models were superior to those obtained by the n-d-M method,and were similar to those obtained by the improved B-L method.The maximum deviations of CA,CN and CP were 3.96％,4.21％ and 3.79％,respectively.
lube base oilstructural group compositioncharacterization factor
国家科技期刊平台
NSTL
万方数据
维普
