A laboratory scale integration of carbon capture and utilization (CCU) technique operating based on highly alkaline aqueous hydroxide sorbents with a semibatch reactive crystallization process of calcium carbonate is presented. The study was conducted with a focus on investigating the kinetics of the crystallization process for CCU applications, where the production of micron-sized calcium carbonate particles occurs by direct addition of CO₂-loaded solution to a crystallizer containing calcium chloride.

Within this system, the need for high temperature heat consumption above 800 °C (109.4 kJ/mol CO₂) for CO₂ decomposition from Na₂CO₃ is avoided by production of value-added chemical from carbonate reach solution. The current set-up enables potential pre-treatment of carbon emission sources due to separate absorption and liquid-liquid crystallization processes. This leads to production of high-purity solid particles in comparison to conventional industrial practices.

Experiments were carried out at several operating conditions at ambient temperature and pressure and effect of the absorbent solution concentration on CO₂ capture efficiency and subsequently the precipitation yield was analyzed. Based on coupling the standard method of moments approach of the population balance formulation with power-law kinetic expressions, a correlation was extracted between the growth rate constant and feed flow rate for the adopted process. Moreover, characterization of the precipitated sample indicates the vaterite polymorphs of calcium carbonate as the dominant crystals in the pH range of 7.9–10.4. These types of demonstrations could contribute to circular economy processes using waste materials and can be considered as a potential approach toward an efficient carbon capture and valorization technique.

介绍了实验室规模的碳捕获和利用（CCU）技术的集成，该技术基于高碱性氢氧化物水溶液吸附剂与碳酸钙的半间歇反应结晶过程进行操作。进行这项研究的重点是研究用于CCU应用的结晶过程的动力学，其中通过将负载有CO _2的溶液直接添加到含有氯化钙的结晶器中来生产微米级碳酸钙颗粒。

在该系统中，通过从碳酸盐溶液中生成高附加值的化学药品，避免了将Na ₂ CO ₃分解为CO ₂所需的高于800°C（109.4 kJ / mol CO ₂）的高温热量消耗。由于单独的吸收和液-液结晶过程，当前的设置可以对碳排放源进行潜在的预处理。与传统的工业实践相比，这导致了高纯度固体颗粒的产生。

实验是在环境温度和压力下的几种操作条件下进行的，以及吸收剂浓度对CO _2的影响捕获效率，然后分析降水量。在将种群平衡配方的矩量法的标准方法与幂律动力学表达式结合起来的基础上，为所采用的过程提取了生长速率常数与进料流速之间的相关性。此外，沉淀样品的表征表明碳酸钙的球ate石多晶型物是在7.9-10.4的pH范围内的主要晶体。这些类型的示范活动可能有助于使用废料的循环经济过程，并且可以被视为实现有效碳捕获和增值技术的一种潜在方法。