【作者】 周贺； 郭朝阳； 张磊； 张路； 赵濉；

【Author】 He Zhou;Zhaoyang Guo;Lei Zhang;Lu Zhang;Sui Zhao;Technical Institute of Physics and Chemistry,Chinese Academy of Sciences;University of Chinese Academy of Sciences;

【机构】 中国科学院理化技术研究所； 中国科学院大学；

【摘要】 陈13-19稠油中富含胶质和沥青质,本文用悬挂滴法研究了三种碱（NaOH,Na₂CO₃,NaHCO₃）对陈13-19稠油胶质与沥青质在煤油/水界面处的扩张流变性能。实验结果表明,胶质和沥青质在油水界面的扩张模量均随着碱浓度的增加而增大,说明碱的加入能促进稠油活性组分在界面上的吸附,增强界面活性分子间的相互作用。由图1（a）可知,在低浓度时,碱的加入使得胶质在煤油/水界面处的模量明显低于未加碱时的模量,这是由于碱与胶质中脂肪酸分子发生反应,皂化的脂肪酸分子亲水性增强,在油水界面处的扩散交换作用增强。随着碱浓度的升高,胶质中高分子的稠环芳香酸开始皂化,芳香酸皂分子间相互作用强,界面扩张模量增大。在测试浓度范围内,加入NaHCO₃后模量均低于未加碱时的模量值,这是由于碳酸氢钠的碱性较小,芳香酸无法有效皂化造成的。由图1（b）可知,在测试浓度范围内,沥青质在煤油/水界面的扩张模量均大于为加碱时的扩张模量,与前面的讨论类似,这是由于沥青质中富含芳香酸造成的。更多还原

【Abstract】 Chen 13-10 heavy oil is rich in resins and asphaltenes.In this research,we studied the effects of alkali（NaOH,Na₂CO₃,NaHCO₃） on the interfacial dilational properties of resins and asphaltenes of Chen 13-19 heavy oil at kerosene/water interface.The experimental results show that the interfacial dilational modulus will increase with increasing alkali concentration,indicating that the addition of alkali will enhance the adsorption and intermolecular interaction of active component molecules at the interface.From Fig.1（a）,the addition of alkalie will decrease modulus at lower concentrations and increase dilational modulus at higher concentrations.This can be explained by that alkali will react with fatty acids in resins,which leads to the enhancement of diffusion-exchange process at lower alkali concentrations.The dilational modulus will increase when the aromatic acids with higher molecular weight reacted with alkali.However,because the weaker alkaline of NaHCO₃,the increase of diffusion process is stronger than the increase of intermolecular interaction,which leads to the lower dilational modulus values during experimental conditions.From Fig.1（b）,the addition of alkali will always increase the dilational modulus for asphaltenes film.This can be explained by that asphaltenes contain more aromatic acids.更多还原