通过分子动力学模拟,研究和卡达诺基表面活性剂在原油/水界面的行为
Congying Lu1,2, Weiyang Liu3, Zhenyu Yuan2
1Provincial Key Laboratory of Oil & Gas Chemical Technology, Chemistry and Chemical Engineering College, Northeast Petroleum University, Daqing, Heilongjiang 163318, China.
这项研究探讨了用于增强石油回收 (EOR) 的卡达诺尔基表面活性剂. 具有特定EO/PO链条安排的非扩展表面活性剂表现出卓越的性能,为油位移剂提供了新的设计策略.
科学领域:
- 绿色化学和可持续材料科学.
- 石油工程和增强的石油回收.
- 计算化学和分子建模.
背景情况:
- 绿色生物表面活性剂卡达诺尔 (Cardanol) 在增强石油回收 (EOR) 方面表现有前途.
- 优化表面活性剂结构对于改善EOR的界面特性至关重要.
- 了解原油-水接口上的分子相互作用是表面活性剂设计的关键.
研究的目的:
- 为EOR设计和评估基于卡达诺的新型非离子和非离子-非离子表面活性剂.
- 研究聚氧乙烯 (PO) 和聚氧烯 (EO) 链定位对表面活性剂性能的影响.
- 用分子动力学模拟来阐明表面活性剂结构和界面特性之间的关系.
主要方法:
- 用分子动力学模拟来建模原油水系统.
- 设计和模拟了六种类型的表面活性剂 (扩展和非扩展,非离子和离子-非离子).
- 分析了界面张力,溶剂可访问的表面积,旋转半径,倾斜角度和辐射分布函数.
主要成果:
- 与硫酸盐和非离子表面活性剂相比,硫酸盐基表面活性剂表现出优越的界面特性.
- 非扩展表面活性剂在改善界面特性方面表现优于扩展表面活性剂.
- 优化表面活性剂结构,如8EO8POSO4,通过平衡分子间相互作用来证明增强吸附和乳化.
结论:
- 在非扩展表面活性剂中,EO链在疏水组和PO链之间的位置提高了吸附能力.
- 基于卡达诺的表面活性剂,特别是具有特定链条配置的硫酸盐类型,为EOR提供了一个有前途的途径.
- 这项研究为设计有效的油位移表面活性剂和理解乳化机制提供了宝贵的见解.
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