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离子液体吸附和降低合成树脂和青油的界面张力:盐度和pH的影响
Seyed Ehsan Moradi1, Seyednooroldin Hosseini2, Naser Akhlaghi3
1Department of Chemical Engineering, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran.
这项研究调查了硫酸盐和pH如何影响合成油中的界面张力降低和离子液体吸附. 在最佳条件下,实现了显著的三级石油回收,证明了石油提取潜力的增强.
科学领域:
- 石油工程是石油工程中的一个.
- 表面化学 表面化学
背景情况:
- 降低界面张力 (IFT) 和离子液体 (IL) 吸附对于增强石油回收 (EOR) 是至关重要的.
- 硫酸盐和不同的pH值条件在合成油中显著影响这些参数.
研究的目的:
- 研究硫酸盐 (MgSO4,Na2SO4) 和pH (3.5-11) 对IFT减小和IL吸附的影响.
- 通过核心洪水实验,评估在第三级石油回收中优化化学配方的性能.
主要方法:
- 在不同的盐度和pH条件下,系统测量树脂 (RSO) 和青合成油的IFT.
- 对岩石表面IL吸附的分析,考虑到肥化过程.
- 核心洪水实验,以评估三级石油回收效率.
主要成果:
- 随着pH值的增加,IFT下降,pH值11时Na2SO4达到0.20mN/m的最低值.
- 在pH值11.0的情况下,通过500ppm的1-decyl-3-methyl imidazolium triflate ([C10mim][TfO]) 和Na2SO4实现了显著的IFT降低到0.01mN/m.
- 由于现场表面活性剂的产生,IL吸附率下降,[C10mim][Cl]和[C10mim][TfO]的吸附率分别从3.67降至2.33和4.21降至3.34毫克IL/g岩石.
- 核心洪水显示,最高的第三级石油回收率为28.8%.
结论:
- 硫酸盐和ILs,特别是在性条件下 (pH 11),有效地减少IFT以提高石油回收.
- 现场表面活性剂的生产在减少IL吸附方面发挥着作用,这对EOR有益.
- 优化的化学配方显示出对三级石油回收的巨大潜力.
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