In the context of carbon sequestration in saline aquifers, we investigate transport dynamics in brine under reservoir-like conditions ( = 8 MPa, = 50C) using microfluidics. We quantify the mass transfer of supercritical in brine across a range of concentrations (0–1 M) and liquid flow rates (15–60 μL/min) for the first time. We find the volumetric mass transfer coefficient ranges from 50.3 to 144.0 s, increasing with flow rate and, to a lesser extent, with salinity. More importantly, the value for supercritical in brine at a higher temperature shows a significant enhancement of >50% compared to gas and liquid in water. Our analysis, incorporating a theoretical mass transfer model, points to a dominant contribution from the liquid film to the overall , nearly doubling that of the emulsion caps, attributed to the thin film's larger surface area and dynamic renewal.

中文翻译：

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盐水中超临界CO2的微流体传质


在咸水含水层碳封存的背景下，我们使用微流体研究了类似水库条件（= 8 MPa，= 50C）下盐水的输运动力学。我们首次量化了盐水中超临界在不同浓度 (0–1 M) 和液体流速 (15–60 μL/min) 范围内的传质。我们发现体积传质系数范围从 50.3 到 144.0 s，随着流速的增加而增加，并且在较小程度上随着盐度的增加而增加。更重要的是，与水中的气体和液体相比，较高温度下盐水中的超临界值显示出> 50％的显着增强。我们的分析结合了理论传质模型，指出液膜对整体的主要贡献几乎是乳液帽的两倍，这归因于薄膜较大的表面积和动态更新。