计算建模和实验性调查的二氧化碳-碳化合物系统在跨尺度的多孔介质
Feiyu Chen1,2, Linghui Sun1,2,3,4, Bowen Li1,2
1University of Chinese Academy of Sciences, Beijing 100049, China.
Molecules (Basel, Switzerland)
|January 25, 2025
概括
这项研究增强了复杂水库中石油回收的二氧化碳 (CO2) 洪水模型. 新的热力学方法改善了对纳米尺度孔中的CO2-碳化合物行为的预测.
科学领域:
- 石油工程是石油工程中的一个.
- 热力学是一种热力学.
- 储水库工程 储水库工程
背景情况:
- 使用二氧化碳的增强石油回收 (EOR) 对生产和碳减排至关重要.
- 了解非传统水库中的二氧化碳碳化合物相位行为至关重要,但具有挑战性.
- 现有的热力学模型在微和纳米尺度孔隙环境中缺乏准确性.
研究的目的:
- 改进有限的多孔介质中的CO2-碳化合物系统的热力学模型.
- 结合赫尔姆霍尔茨的自由能量和吸附效应,以改善相位行为预测.
- 为了提高二氧化碳洪水模拟在非传统的水库的准确性.
主要方法:
- 开发了一种使用赫尔姆霍尔茨自由能量作为趋同标准的多尺度热力学模型.
- 微和纳米尺度孔模拟中的综合吸附效应.
- 通过物理模拟验证了模型,并分析了相位图和流体行为.
主要成果:
- 封闭显著改变相位行为:泡点压力偏离5-23%和流体密度增加~2%的尺度下降到10纳米.
- 较小的孔隙限制了气体膨胀,增加了二氧化碳的溶解度和相位混合.
- 模型准确地预测了局限系统中的相位过渡和二氧化碳注入效率.
结论:
- 这种精细的模型为纳米水库中的CO2-碳化合物相位行为提供了更高的准确性.
- 研究结果为优化非传统形式的基于二氧化碳的EOR策略提供了关键的见解.
- 改进的预测能力通过增强的石油回收来支持有效的碳减排目标.
相关概念视频
02:14Combustion Energy: A Measure of Stability in Alkanes and Cycloalkanes
6.2K
The low reactivity in alkanes can be attributed to the non-polar nature of C–C and C–H σ bonds. Alkanes, therefore, were initially termed as “paraffins,” derived from the Latin words: parum, meaning “too little,” and affinis, meaning “affinity.”
Alkanes undergo combustion in the presence of excess oxygen and high-temperature conditions to give carbon dioxide and water. A combustion reaction is the energy source in natural gas, liquified...
Alkanes undergo combustion in the presence of excess oxygen and high-temperature conditions to give carbon dioxide and water. A combustion reaction is the energy source in natural gas, liquified...
6.2K
01:30Typical Model Studies
332
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
332
01:09Turbulent Flow: Problem Solving
89
Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
89