Study of Oil/Water Interfacial Tension of Vacuum Residual Fractions from Iranian Light Crude Oil  

作　　者：彭勃 李明远 赵锁奇 吴肇亮 Johan Sjoblom Harald Hoiland 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,University of Petroleum,BeiJing 102249,China Department of Chemistry,University of Bergen,Allegate 41,5007 Bergen,Norway [2]State Key Laboratory of Heavy Oil Processing,University of Petroleum,Beijing 102249,China [3]Department of Chemistry,University of Bergen,Allegate 41,5007 Bergen,Norway

出　　处：《Chinese Journal of Chemical Engineering》2003年第6期681-685,共5页中国化学工程学报（英文版）

基　　金：Supported by the National Key Basic Research Programme (No.973-G1999022505),University of Petroleum Basic Research Fund(No.ZX9904)

摘　　要：The vacuum residual from Iranian Light crude oil are separated into a series of 16 narrow fractions according to the molecular weight by the supercritical fluid extraction and fractional (SFEF) technology. The chemical element and the UV spectrum of each fraction are analyzed. The effects of several factors on the interfacial tension are investigated, which are the fraction concentration in oil phase, the ratio of oil component, the salts dissolved in the water phase and the pH value. The interfacial tension decreases rapidly as the concentration of the residual fraction in the oil increases, showing a higher interfacial activity of the fraction. The interfacial tension changes, as the amount of absorption or the state of the fractions in the interface changes resulting from different ratios of oil, different kinds or concentrations of salts in water, and different pH values. It is concluded that the interfacial tension changes regularly, corresponding to the regular molecular parameters of the vacuum residual fractions.The vacuum residual from Iranian Light crude oil are separated into a series of 16 narrow fractions according to the molecular weight by the supercritical fluid extraction and fractional (SFEF) technology. The chemical element and the UV spectrum of each fraction are analyzed. The effects of several factors on the interfacial tension are investigated, which are the fraction concentration in oil phase, the ratio of oil component, the salts dissolved in the water phase and the pH value. The interfacial tension decreases rapidly as the concentration of the residual fraction in the oil increases, showing a higher interfacial activity of the fraction. The interfacial tension changes, as the amount of absorption or the state of the fractions in the interface changes resulting from different ratios of oil, different kinds or concentrations of salts in water, and different pH values. It is concluded that the intrfacial tension changes regularly, corresponding to the regular molecular parameters of the vacuum residual fractions.

关 键 词：crude oil emulsion interfacial tension vacuum residual supercritical fluid extraction and fractionation 

分 类 号：TE621[石油与天然气工程—油气加工工程]