【摘要】 碳捕集、利用与封存（CCUS）技术是实现碳中和目标的关键手段之一，其中吸附反应器用于CO₂捕集是一项新兴技术。然而，当前对反应器内颗粒流动特性和传热特性的研究相对不足，限制了其优化设计。为此，本研究构建了考虑气固流动、传热传质及化学反应的多相网格质点（MP-PIC）模型，模拟了工业中以K₂CO₃为吸附剂的两种常见反应器，深入探讨了气固湍流流动特性、传热特性及运行参数对CO₂吸附性能的影响。结果表明，对冲反应器因中心颗粒浓度较高，形成了CO₂和H₂O体积分数接近于0的区域；而四角切圆反应器的颗粒分布更加均匀，与气体混合效果更佳，反应更加充分，温度更高，CO₂捕集效果也更为显著。此外，大粒径颗粒在反应器内的停留时间更长，有助于提高CO₂的去除率。更多还原

【Abstract】 Carbon capture, utilization and storage（CCUS） technology is the key means to achieve carbon neutrality goals, among which the adsorption reactor for CO₂ capture is an emerging technology. However, the current research on the particle flow and heat transfer characteristics in the reactor is relatively insufficient, which limits its optimal design. In this study, a multiphase particle-incell（MP-PIC） model considering gas-solid flow, heat and mass transfer, and chemical reaction was constructed to simulate two common reactors in industry, using K₂ CO₃ as the adsorbent. The effects of gas-solid turbulent flow characteristics, heat and mass transfer characteristics, and operating parameters on the adsorption performance of CO₂ were thoroughly explored. The results showed that the counter-type reactor formed a region where CO₂ and H₂O volume fractions were close to 0 due to the high concentration of particles in the center, while the particle distribution of the four-corner tangential reactor has a more uniform particle distribution, better mixing effect with gas, more complete reaction, higher temperature and more significant CO₂ capture effect. In addition, large particles have longer residence time in reactor, which is conducive to improve the CO₂ removal rate.更多还原