用KCl进行干预的不同类型表面活性剂修改的煤的湿化行为和机制
Jingshuo Zhang1, Xiaoming Ni1,2, Gaofeng Liu3
1School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
Langmuir : the ACS journal of surfaces and colloids
|April 21, 2025
概括
加入化 (KCl) 通过改变煤炭的湿透性,显著降低了压裂液的逆流. 这项研究揭示了KCl如何影响表面活性剂修饰的煤,这对于优化煤层中的水力压裂至关重要.
科学领域:
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 表面活性剂在煤层水力压裂中增强压裂液的反流.
- 压裂液中的矿物离子对回流性能产生了重大影响.
- 了解离子-湿度相互作用是优化煤炭裂变的关键.
研究的目的:
- 调查化 (KCl) 对表面活性剂修改煤的湿透性的影响机制.
- 阐明KCl如何影响裂变流体和煤炭表面之间的相互作用.
- 为改善煤层中压裂液反流提供理论基础.
主要方法:
- 使用山西长平煤矿煤炭样本进行模拟研究.
- 分析辐射分布函数 (RDF),键和扩散行为 (平均平方位移).
- 计算相互作用能量,包括静电和范德瓦尔斯力 (VDW).
主要成果:
- KCl显著降低了表面活性剂与水的相互作用,减少了键 (22.02-40.48%),降低了结合能 (41.32%-58.23%).
- KCl改变了表面活性剂在水溶液中的分布,并将水扩散系数降低了59.56%以上.
- 基醇普遍降低了表面活性剂修改的煤的可湿性,根据表面活性剂的类型对静电和VDW力产生不同的影响.
结论:
- 化 (KCl) 对表面活性剂修改的煤炭的可湿性产生负面影响,从而影响破裂液的反流.
- 这项研究阐明了KCl对煤-表面活性剂-水相互作用的影响背后的分子机制.
- 这些发现为选择合适的压裂流体和管理煤层水力压裂中的离子度提供了关键的见解.
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