Previous studies have investigated the overall performance of the modified Solvay process based on a new alkaline compound, namely, KOH. Preliminary results have confirmed its high reactivity and effectiveness in capturing CO₂ and managing reject brine. In this study, parametric sensitivity analysis has been carried out to optimize the operating conditions and thereby maximize CO₂ capture and ions removal from high-salinity brines. Response surface methodology (RSM) analysis using the central composite design (CCD) approach was implemented to statistically determine the impact of important operating conditions, including KOH concentration (30–110 g/l), CO₂ gas flow rate (400–1600 ml/min), gauge pressure (1–3 barg), and temperature (10–50 °C) on key response process output variables, such as CO₂ uptake and ions reduction. The importance of these parameters and their interactions were confirmed by employing analysis of variance (ANOVA) approach at a confidence level of 95% (p < 0.05). These analyses demonstrated that under the optimized conditions of a temperature of 10 °C, gauge pressure of 2.1 barg, CO₂ gas flow rate of 848.5 ml/min, KOH concentration of 110 g/l, and an inert mixing particle volume fraction of 15%, a maximum CO₂ uptake value of 0.58 g/g KOH, maximum sodium $\left(\mathrm{N}{\mathrm{a}}^{+}\right)$ removal of 44.1%, chloride ($\mathrm{C}{\mathrm{l}}^{-})$ removal of 40.1%, calcium ($\mathrm{C}{\mathrm{a}}^{2+})$ removal of 100%, and magnesium ($\mathrm{M}{\mathrm{g}}^{2+})$ removal of 99.8% were achieved. The characterization of the collected solid products at optimum conditions revealed the production of valuable and useful products, particularly sodium and potassium bicarbonates, in addition to KCl.

先前的研究调查了基于新碱性化合物 KOH 的改良索尔维工艺的整体性能。初步结果证实了其在捕获 CO ₂和管理废弃盐水方面的高反应性和有效性。在这项研究中，已进行参数灵敏度分析以优化操作条件，从而最大限度地从高盐度盐水中捕获CO ₂和去除离子。实施使用中心复合设计 (CCD) 方法的响应面方法 (RSM) 分析，以统计确定重要操作条件的影响，包括 KOH 浓度 (30–110 g/l)、CO ₂气体流速 (400–1600 ml/min)、表压 (1–3 barg) 和温度 (10–50 °C) 对关键响应过程输出变量的影响，例如 CO ₂吸收和离子还原。这些参数及其相互作用的重要性通过在 95% 的置信水平 ( p < 0.05)下采用方差分析 (ANOVA) 方法得到证实。这些分析表明，在温度为 10 °C、表压为 2.1 barg、CO ₂气体流速为 848.5 ml/min、KOH 浓度为 110 g/l、惰性混合颗粒体积分数为 15 %，最大 CO ₂吸收值为 0.58 g/g KOH，最大钠$\left(\mathrm{N}{\mathrm{一种}}^{+}\right)$ 去除 44.1%，氯化物（$\mathrm{C}{\mathrm{升}}^{-})$ 去除40.1%，钙（$\mathrm{C}{\mathrm{一种}}^{2+})$ 去除 100% 和镁（$\mathrm{米}{\mathrm{G}}^{2+})$达到了 99.8% 的去除率。在最佳条件下收集的固体产品的表征表明，除了 KCl 之外，还生产了有价值和有用的产品，特别是碳酸氢钠和碳酸氢钾。