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使用不同原油对离子液体吸附和界面张力降低的研究;盐,离子液体和pH的影响

Mojtaba Khosravani¹, Naser Akhlaghi², Seyednooroldin Hosseini³

¹Department of Chemical Engineering, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran.

Scientific reports

|May 10, 2024

概括

这项研究研究了盐和pH如何影响原油的界面张力 (IFT). 添加1-dodecyl-3-methyl imidazolium chloride ([C12mim][Cl]) 显著降低了IFT,特别是在酸性原油中,并最大限度地降低了表面活性剂的吸附.

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:

界面张力 (IFT) 是提高石油回收的关键参数.
了解各种化学物种和pH对IFT的影响对于优化油水相互作用至关重要.

研究的目的:

为了研究无机盐 (NaCl,KCl,CaCl2,MgCl2,CaSO4,MgSO4,Na2SO4) 和pH差异对不同原油类型的IFT降解的影响.
评估作为IFT降低剂的1-dodecyl-3-methyl imidazolium chloride ([C12mim][Cl]) 的有效性及其对pH效应和表面活性剂吸附的影响.

主要方法:

使用三种原油类型 (中性,酸性,基性) 在不同盐度和pH值 (3.5-11) 下系统测量IFT.
对肥化工艺在 IFT 减少酸性原油中的作用的分析.
评估[C12mim][Cl] (100-1000 ppm) 对IFT及其与pH和盐 (Na2SO4) 相互作用的影响.
在特定的pH值和盐分条件下测量[C12mim][Cl]对岩石表面的吸附.

主要成果:

盐和pH显著影响IFT,由于肥化,对酸性原油产生明显影响,特别是在pH11.
大多数盐都表现出类似的IFT趋势,除了MgCl2和CaCl2,它们表现出转移点.
[C12mim][Cl]添加最小化了依赖pH的IFT变化,在所有原油中实现了0.08 mN/m的低IFT.
在受到肥化过程和Na2SO4.4影响的特定pH条件下,观察到0.41mg表面活性剂/g岩石的最小[C12mim][Cl]吸附.

结论:

pH 和特定的无机盐在调节原油-水系统的界面张力方面起着至关重要的作用.
1-多德基-3-甲基伊米达化物 ([C12mim][Cl]) 是一种高效的表面活性剂,可降低IFT和减轻pH效应,具有增强石油回收的潜力.
了解表面活性剂吸附机制对于优化化学洪水过程至关重要,因为肥化会影响吸附行为.

关键词:

吸附方式吸附方式吸附方式性的性的在现场表面活性剂.离子液体是一种离子液体.盐分 - - 盐分 - - 出来肥化肥化肥化它们的pH值为pH.

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