郑楠  (副教授)

课题组论文被The Journal of Supercritical Fluids期刊接收！

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发布时间：2025-06-20

发布时间：2025-06-20

文章标题：课题组论文被The Journal of Supercritical Fluids期刊接收！

内容：

依托国家重点研发计划课题(No.2023YFB4102205)，课题组对超临界温压条件下流态化钙基载能体的流动、传热及碳酸化反应特性进行了数值模拟研究，相关成果近日被The Journal of Supercritical Fluids期刊(IF: 4.33，最具影响力期刊)接收。陈绍鑫（硕士研究生)为论文第一作者，郑楠副教授为通讯作者。

Title: Numerical investigation on the carbonation of CaO particles in a supercritical CO2 fluidized bed reactor with immersed tubes  

Abstract: The integration of calcium-looping thermochemical energy storage system with the supercritical carbon dioxide (SCO₂) Brayton cycle offers a promising technical scheme to improve the energy conversion efficiency of the concentrated solar power plant. The carbonation reactor still faces challenges such as a serious decline in reactivity during multicycle carbonation-calcination reactions. In this study, a novel solution using sCO₂ as the fluidizing agent to improve the fluidization quality and avoid the agglomeration and sintering of CaO/CaCO₃ particles in a carbonation reactor is proposed. The effects of total gas pressure and CO₂ partial pressure on the fluidization quality, bed-to-tube heat transfer coefficient (HTC), and carbonation reaction are investigated by using the Eulerian−Eulerian two-fluid model. The results indicate that increasing the gas pressure above the CO₂ critical pressure leads to the particulate fluidization of Geldart B-type Ca-based particles. A more uniform distribution of local bed-to-tube HTC around the tube but with a reduced circumferential average HTC (by 45-119 W∙m^-2∙K^-1) is achieved when using sCO₂. An increase of CO₂ partial pressure from 40 to 4000 kPa leads to a nearly 1000-fold increase in conversion rate, indicating that special designs are necessary to handle the potential over-temperature problem inside the supercritical pressure fluidized bed reactor.