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纳米封闭的竞争性吸附和可湿度过渡

Wenzhen Chu¹, Kaiqiang Zhang²

¹Institute of Energy, Peking University, Beijing, China; School of Earth and Space Sciences, Peking University, Beijing, China; Bohai Oilfield Research Institute, Tianjin Branch of CNOOC Ltd., Tianjin 300452, China.

Journal of colloid and interface science

|July 17, 2025

概括

二氧化碳 (CO2) 在表面上取代n-decane,改变了可湿性. 这种竞争性吸附对于地质二氧化碳储存和工业应用至关重要,提高了效率和安全性.

科学领域:

表面科学是一门学科.
物理化学物理化学
地质科学地质科学

背景情况:

吸附驱动的湿度转换是流体-固体接口的关键.
多种系统中的竞争性吸附复杂化了界面能量和流体行为.
了解这些动态对于自然和工业过程至关重要.

研究的目的:

通过分子模拟和原子力显微镜来研究CO2-n-decane竞争性吸附动态.
在地质表面科学中建模湿度过渡.
量化接力驱动湿度变化的关键值.

主要方法:

用分子模拟来研究吸附动力学.
原子力显微镜提供了实验验证.
构建了一个3D表面模型 (FadTP) 来量化粘附力和关键值.

主要成果:

在323.15K和1MPa以上的压力下,CO2会取代n-decane,在三相接触线上优先吸附.
稳定的二氧化碳吸附层在固体-液体界面形成,在5MPa时达到1.14nm,然后由于混合性而变薄.
在TP空间中定义了一个可湿度过渡线:TP=1.00-1.62×10^7·P+1.71·P^2.

结论:

竞争性吸附显著影响了湿度过渡.
由于CO2引起的湿度变化,提高了地质CO2活动的效率和安全性.
这些发现促进了对地球,环境,工业和碳中和努力的理解和应用.

关键词:

原子力显微镜的原子力显微镜.有竞争力的吸附.地质表面科学地质表面科学分子模拟分子模拟湿度过渡的过渡情况

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