Study on Aggregation Property of Asphaltene by Gel Permeation Chromatography
It is of great significance to study the aggregation property of asphaltene for petroleum exploitation,storage,transportation and processing.Four typical residual oil A～D and their asphaltene were evaluated by gel permeation chromatography.The standard curve of polystyrene was established,and the aggregation behavior of asphaltene was studied quantitatively by the change of molecular weight.The results showed that mass concentration was an important factor affecting the aggregation behavior of asphaltene,and the aggregation degree of asphaltene was more obvious than that of residual oil at same mass concentration,while the molecular weight of light oil with almost no asphaltene had little correlation with the mass concentration.The molecular weight and molecular weight distribution of the four residual oil and their asphaltene were very different.According to the change rate of molecular weight with mass concentration,the aggregation degree of the asphaltene was evaluated,and the aggregation order of the four asphaltene was:D>C>A>B.
万方数据
维普
