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Updated: Feb 26, 2026

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在直流电场下的酸性油中的水乳液中探测水滴凝结
Ning Li1, Zhiqian Sun2, Yu Niu1
1CNOOC Institute of Chemical & Advanced Materials, Qingdao 266500, China.
Langmuir : the ACS journal of surfaces and colloids
|February 24, 2026
概括
原油中的纳酸 (NA) 在静电脱过程中阻碍水滴凝聚. 了解NA相互作用揭示了可以调整以改善油水分离过程的机制.
科学领域:
- 石油化学 石油化学
- 合体和表面科学科学
- 计算化学计算化学
背景情况:
- 纳酸 (NA) 是酸性原油中的有机酸.
- NA会导致严重的乳化,并使静电脱乳化复杂化.
- 了解NA的作用对于优化油水分离至关重要.
研究的目的:
- 在直流电场下阐明含有NA的油中的水 (W/O) 乳液的电凝机制.
- 为了研究电场强度 (E) 和NA度 (cn) 对滴滴凝聚的影响.
主要方法:
- 用分子动力学 (MD) 模拟来研究水滴的动态行为.
- 使用实验方法检查不同电场和NA度下的滴状凝聚.
- 分析包括溶剂可访问表面积 (SASA) 和图形相互作用能量计算.
主要成果:
- 随着SASA降低,NA-水滴相互作用会减弱.
- 在低的NA度下",头对头"的NA配置阻碍了凝聚 (排斥能:26.03kJ·mol-1).
- 在较高的NA度 (0.0441mol·L-1),一个"头到肩"的配置有助于凝聚 (吸引能:-11.32kJ·mol-1).
- 增加NA度会降低界面张力 (IFT).
- 电场诱导NA对齐,导致硬体障碍和阻碍滴滴接触.
- 较高的电场加剧了分子重定向和滴和NA之间的H键形成.
结论:
- 纳弗酸的配置和度显著影响W/O乳液电凝.
- 电场强度调节NA行为,影响滴滴相互作用和凝聚.
- 这项研究为酸性原油中的脱硫机制提供了分子层面的见解.
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