探测多德干和米卡/石的相互作用机制:对石油回收的影响
Ting Peng1, Han Li1, Jingyi Wang1,2
1College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China.
Langmuir : the ACS journal of surfaces and colloids
|January 18, 2025
概括
石油与矿物之间的相互作用是石油生产和环境清洁的关键. 这项研究揭示了pH值和离子度等溶液条件如何影响油附着于和石表面,指导更好的油回收和污染物去除.
科学领域:
- 合体和表面科学科学
- 石油工程是石油工程中的一个.
- 环境科学 环境科学
背景情况:
- 了解石油-矿物界面相互作用对于石油生产和环境保护至关重要.
- 矿物表面的油滴的行为受到复杂的物理化学因素的影响.
- 之前的研究已经强调了离子强度和pH值的重要性,但缺乏详细的机制见解.
研究的目的:
- 在水性介质中研究多德干 (油) 和/矿物之间的界面相互作用机制.
- 阐明电双层 (EDL) 力量,范德瓦尔斯 (vdW) 吸引力和离子桥在石油矿物粘附中的作用.
- 确定不同溶液条件 (pH,NaCl,Ca2+,Mg2+度) 如何影响这些相互作用,以改善石油回收和污染物去除.
主要方法:
- 利用基于原子力显微镜 (AFM) 的滴探技术来探测油矿物相互作用.
- 系统地改变了溶液参数,包括pH值,NaCl度和双价离子 (Ca2+,Mg2+) 度.
- 分析了粘附力和水膜厚度,以了解主要的相互作用机制.
主要成果:
- 对于 dodecane-mica:EDL排斥在低NaCl中占主导地位;更高的pH和NaCl降低了排斥力,通过vdW力促进附着. 双价酸削弱了EDL,增强了依恋.
- 对于多德干石:Ca2+的离子桥接导致了显著的粘附. 在pH值为4的CO2气泡阻碍了粘附. 高NaCl降低了粘附性,而高Ca2+/Mg2+通过桥梁增强了粘附性.
- 在pH 10的沉物 (Ca(OH) 2,Mg(OH) 2降低了多德干 - 石粘附.
结论:
- 溶液化学对油矿物界面相互作用产生深远的影响,控制粘附和脱落.
- EDL,VDW力,离子桥梁和表面沉是控制油的浸透性和粘附性的关键机制.
- 这些发现为优化石油回收过程和加强石油污染物的去除提供了基本的见解.
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