Evolution of Mineral-Accessible Surface Area Induced by Geochemical Reactions
Evolution of Mineral-Accessible Surface Area Induced by Geochemical Reactions
复制标题
地球化学反应引起的矿物可及表面积的演变
DOI：
10.1021/acsearthspacechem.2c00335
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发表时间：
2023
影响因子：
3.4
通讯作者：
Beckingham, Lauren E.
中科院分区：
文献类型：
--
作者：
Qin, Fanqi;Salek, Md. Fahim;Asadi, Parisa;Beckingham, Lauren E.
矿物溶解和沉淀反应发生在广泛的多孔介质系统中，由固相和流体相之间的平衡偏离驱动。反应发生在与反应性流体接触的矿物表面或可接近的矿物表面区域。这些矿物表面积可以使用多尺度成像方法来确定，并已被证明可以提高模拟多孔介质中的矿物反应速率相比，其他估计的反应表面积。随着反应的进展，矿物表面积的演变，和反应输运模拟往往使用一个简化的模型，假设球形颗粒来估计矿物表面积的演变。然而，这并不能描述具有不同矿物可及性的多孔介质系统中反应表面的演变。这项工作的目的是定量评估可访问的矿物表面积在多孔介质中的多矿物系统进行矿物溶解反应引起的酸暴露的演变。在反应之前和之后，通过砂岩样品的2D扫描电子显微镜和3D X射线计算机断层扫描成像来确定可接近的矿物表面积。可及表面积的量化演变相比，使用当前的方法计算的矿物表面积的演变。结果显示，由于反应，总表面积总体增加;然而，个别矿物表面积可能增加或减少。从成像和模型中使用的方程测量的矿物表面积值中观察到变化。矿物比表面积的演化主要受总比表面积和孔隙连通性的影响，而不是孔隙度和体积分数的演化。
Mineral dissolution and precipitation reactions occur in a wide range of porous media systems, driven by deviations from an equilibrium between solid and fluid phases. Reactions occur at mineral surfaces in contact with reactive fluids or accessible mineral surface areas. These mineral surface areas can be determined using a multiscale imaging approach and have been shown to improve the simulation of mineral reaction rates in porous media compared to other estimates of reactive surface area. As reactions progress, mineral surface area evolves, and reactive transport simulations often use a simplified model assuming spherical grains to estimate mineral surface area evolution. This, however, does not depict the evolution of reactive surfaces in porous media systems with varying mineral accessibility. This work aims to quantitatively assess the evolution of accessible mineral surface area in porous media for a multimineralic system undergoing mineral dissolution reactions induced by acid exposure. Before and after the reaction, accessible mineral surface areas are determined from 2D scanning electron microscopy, and 3D X-ray computed tomography imaging of a sandstone sample. The quantified evolution of accessible surface area is compared to the calculated mineral surface area evolution using current approaches. Results show an overall increase in total surface area due to the reaction; however, individual mineral surface areas may increase or decrease. Variation is observed in mineral surface area values measured from imaging and equations used in models. The evolution of mineral surface area is largely impacted by the total surface area as well as the pore connectivity rather than porosity and volume fraction evolution.
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影响因子：
3.4
作者：
Qin, Fanqi;Beckingham, Lauren E.
通讯作者：
Beckingham, Lauren E.
影响因子：
3.4
作者：
F. Qin;M. Salek;Parisa Asadi;C. Iloejesi;Olivia M. Brunhoeber;Mukseet Mahmood;L. Beckingham
通讯作者：
F. Qin;M. Salek;Parisa Asadi;C. Iloejesi;Olivia M. Brunhoeber;Mukseet Mahmood;L. Beckingham
影响因子：
3.2
作者：
Parisa Asadi;L. Beckingham
通讯作者：
Parisa Asadi;L. Beckingham
图像分辨率对矿物丰度和可及表面积量化的影响
影响因子：
3.9
作者：
F. Qin;L. Beckingham
通讯作者：
L. Beckingham
影响因子：
3.2
作者：
Khurshid, Ilyas;Afgan, Imran
通讯作者：
Afgan, Imran