Carbon dioxide (CO₂) mineralization by accelerated carbonation using a high-gravity rotating packed bed (HiGee RPB) is a promising process that simultaneously stabilizes industrial alkaline solid wastes and sequestrates CO₂ from flue gas. In this study, the carbonation kinetics depicting the CO₂ mineralization using different alkaline solid wastes in a HiGee RPB were evaluated based on the surface coverage model. The dynamic changes on Ca²⁺ concentration during the carbonation process were successfully fitted and described using the Streeter–Phelps formula. The L/S ratio and high-gravity effect on carbonation conversion (δ_Ca), CO₂ capture capacity (C_cap), and changes of Ca²⁺ concentration (C_Ca²⁺) were discussed. The kinetic model was validated using experimental data obtained by the batch tests. The results indicated that δ_Ca and reaction constants of different alkaline solid wastes were fitted by the surface coverage model with acceptable R² values. The proposed kinetic model was used to elucidate the competition between Ca²⁺ leaching and CaCO₃ precipitation during the carbonation. In addition, the liquid side mass transfer rate enhanced by the high-gravity effect was determined. The enhancement factor was used to identify the relationship between the liquid side mass transfer and chemical reaction.

中文翻译：

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高重力旋转填充床中碱性固体废物CO2矿化的整体浸出-碳化动力学模型

使用高重力旋转填充床（HiGee RPB）通过加速碳化来二氧化碳（CO ₂）的矿化是一种有前途的过程，该过程可同时稳定工业碱性固体废物并从烟道气中吸收CO ₂。在这项研究中，基于表面覆盖模型评估了描述在HiGee RPB中使用不同碱性固体废物的CO ₂矿化的碳化动力学。碳酸化过程中Ca ²⁺浓度的动态变化已成功拟合，并使用Streeter-Phelps公式进行了描述。的L / S比率和高重力作用于碳酸化转化（δ_钙），CO ₂捕获能力（Ç_cap），并讨论了Ca ²⁺浓度（ C _{Ca ²⁺}）的变化。使用批处理测试获得的实验数据验证了动力学模型。结果表明， δ_钙和反应不同碱性固体废物的常数拟合由具有可接受的表面覆盖模型- [R ^2个值。提出的动力学模型用于阐明Ca ²⁺浸出与CaCO ₃之间的竞争碳化过程中沉淀。另外，确定了通过高重力效应提高的液体侧传质速率。增强因子用于确定液体侧传质与化学反应之间的关系。