Indirect carbonation is a technology for carbon capture, utilization, and storage that is used to reduce the concentration of CO₂, and it may be also used to produce vaterite for drug delivery materials. However, vaterite is difficult to produce at the sizes and production volumes required for these applications. In this study, we investigated the effects of sucrose additions to seawater in an indirect carbonation process to increase CO₂ storage, generate vaterite, and reduce CaCO₃ particle size. In addition, sucrose was added before and after Ca elution and the CO₂ storage, vaterite content, and CaCO₃ particle size results were compared. By adding sucrose to seawater, the CO₂ storage capability was doubled, the vaterite content increased by 34%, and the CaCO₃ particle size decreased by 41% compared to results using seawater alone. When the molar ratio of sucrose to Ca in the Ca eluate was 1:2, the vaterite content was at its highest and the particle size was the smallest. At this ratio, the supersaturation of the Ca eluate was maximized due to the high Ca concentration and pH. Adding sucrose before Ca elution had many advantages compared to adding sucrose after Ca elution: the vaterite content increased, the particle size decreased, and most significantly, CO₂ storage and CaCO₃ production doubled and the addition of NaOH for carbonation was unnecessary. Because seawater and sucrose used in this study are non-toxic and inexpensive, the economical mass production of small-sized pure vaterite using this technology is feasible.

间接碳酸化是一种用于碳捕获、利用和储存的技术，用于降低CO ₂的浓度，也可用于生产用于药物递送材料的球霰石。然而，球霰石难以以这些应用所需的尺寸和产量生产。在这项研究中，我们研究了在间接碳酸化过程中向海水中添加蔗糖以增加 CO ₂储存、生成球霰石和降低 CaCO ₃粒径的影响。此外，在Ca洗脱前后添加蔗糖，比较了CO ₂储存量、球霰石含量和CaCO ₃粒径结果。通过向海水中添加蔗糖，CO ₂与仅使用海水的结果相比，储存能力翻了一番，球霰石含量增加了 34%，CaCO ₃粒径减少了 41%。当Ca洗脱液中蔗糖与Ca的摩尔比为1:2时，球霰石含量最高，粒径最小。在这个比率下，由于高 Ca 浓度和 pH 值，Ca 洗脱液的过饱和度最大化。Ca洗脱前添加蔗糖与Ca洗脱后添加蔗糖相比具有许多优点：球霰石含量增加，粒径减小，最显着的是CO ₂储存和CaCO ₃产量翻了一番，无需添加 NaOH 进行碳酸化。由于本研究中使用的海水和蔗糖无毒且价格低廉，因此利用该技术经济地大批量生产小型纯霰石是可行的。