文献类型：期刊文献

英文题名：Numerical investigation on preparation of expanded polymer beads using supercritical CO2 in a spouted bed

作者：Xie, Huihao[1];Zong, Yuan[1];Chen, Yichong[1];Hu, Dongdong[1];Xu, Zhimei[1];Zhao, Ling[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：267

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20230213353244);WOS:【SCI-EXPANDED(收录号:WOS:000921503000003)】；

基金：This work was supported by the National Natural Science Foundation of China (21978080) , Fundamental Research Funds for the Central Universities (JKA01221106) and the 111 Project (B20031) .

语种：英文

外文关键词：Bead foaming; Spouted bed; CFD-DEM; Supercritical carbon dioxide; Bubble evolution

摘要：The bead foaming process in a spouted bed is a green way to manufacture expanded beads. A CFD-DEM model has been established to investigate the hydrodynamics behavior in the spouted bed. The simula-tion results have showed that the establishment of the particle fountain during saturation can effectively disperse the polymer particles and avoid their aggregation. During depressurization, the flow field in the main part of the spouted bed is relatively uniform. Therefore, particles confined within the spouted bed experience similar depressurization profiles, which is beneficial to the uniformity of the expanded beads. Based on the depressurization profiles provided by the CFD-DEM simulation, a bubble evolution model has been built to investigate the effects of operating parameters on the bead foaming results. The simu-lation results indicate that expanded beads with a narrower cell size distribution can be prepared at a higher saturation pressure rather than a higher pressure release rate.(c) 2022 Elsevier Ltd. All rights reserved.