原油在水溶液中的泽塔潜力
Harry Collini1, Matthew D Jackson2
1Novel Reservoir Modelling and Simulation Group, Department of Earth Science and Engineering, Imperial College London, UK; Now at BP International Centre for Business and Technology, Sunbury-on-Thames, Middlesex, UK.
Advances in colloid and interface science
|September 11, 2023
概括
了解原油表面电荷至关重要. 受到pH值和Ca2+和Mg2+等二价离子的影响,泽塔电位会影响各种应用中的油水相互作用.
科学领域:
- 合体和表面科学科学
- 接口的物理化学 接口的物理化学
- 石油工程是石油工程中的一个.
背景情况:
- 在水溶液中原油的表面电荷是不太了解,阻碍了应用.
- 泽塔电位测量,主要是通过电泳法 (EPM),是了解表面电荷的关键.
- 现有的关于原油泽塔潜力的数据有限,需要进行对比和比较.
研究的目的:
- 审查和对现有的原油泽塔潜力测量进行对比.
- 为了比较和对比以前对原油表面收费的发现.
- 通过使用流动潜力方法 (SPM) 对原油湿膜进行新的泽塔潜力测量.
主要方法:
- 文献综述和对现有的原油泽塔潜力数据进行对比.
- 电泳法 (EPM) 用于对油滴/乳液进行泽塔电位测量.
- 流动潜力方法 (SPM) 用于测量原油湿膜和层上的泽塔潜力.
主要成果:
- 泽塔电位取决于电解质的pH值和双价离子 (Ca2+,Mg2+) 的度.
- 较低的pH值和较高的双价离子度导致更积极的泽塔电位.
- 同电点 (IEP) 范围在NaCl的pH 3-5和CaCl2/MgCl2的pCa/pMg 0-1之间;SPM结果与EPM发现一致.
结论:
- 原油表面电荷受pH值和双价离子度的控制,在IEP附近表现出Nernstian行为.
- 对离子的敏感性随着离子强度的下降而降低;影响因原油而异,与碳化合物不同.
- 湿膜和滴滴的泽塔潜力是可比的,表明不同油型的表面电荷控制一致.
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