This work is framed within the topic of microbially enhanced carbon mineralization: biological catalysts are utilized to alter reaction rates and enhance carbon mineralization in the context of CO${}_2$ storage in highly reactive minerals formations. We propose a micro-continuum Eulerian formulation of coupled flow and bio-geochemical reactive transport at the pore-scale, in which the reactive transport model is fully coupled with a biomass-nutrient growth model treated with Monod’s equation. In order to assess the role of biological catalysts in enhancing carbon mineralization, we then present simulations results and sensitivity studies of an application case of carbon mineralization in an idealized porous geometry with and without biomass growth at conditions relevant to CO${}_2$ storage in ultramafic rocks. Results clearly highlight the role of the biomass in enhancing the pH of the aqueous solution, a process called bioalkalinization, thereby leading in a highly non-linear way to enhanced calcite precipitation, resulting in an interesting potential methodology for CO${}_2$ immobilization.

这项工作的主题是微生物增强碳矿化：利用生物催化剂来改变反应速率并增强 CO 背景下的碳矿化${}_2$储存在高活性矿物地层中。我们提出了一种在孔隙尺度上耦合流动和生物地球化学反应传输的微连续欧拉公式，其中反应传输模型与用莫诺方程处理的生物量-养分增长模型完全耦合。为了评估生物催化剂在增强碳矿化方面的作用，我们随后提出了理想化多孔几何形状中碳矿化应用案例的模拟结果和敏感性研究，在与 CO 相关的条件下有和没有生物质生长${}_2$储存在超镁铁质岩石中。结果清楚地强调了生物质在提高水溶液 pH 值方面的作用，这一过程称为生物碱化，从而以高度非线性的方式增强方解石沉淀，从而产生了一种有趣的潜在 CO2 方法${}_2$固定化。