Numerical simulations of high pressure carbon dioxide fluid fluidized beds--颗粒学报PARTICUOLOGY

Cai, W., Xia, X., Li, X., Chen, X., Xu, Z., & Lu, H. (2023). Numerical simulations of high pressure carbon dioxide fluid fluidized beds. Particuology, 78, 1-15. https://doi.org/10.1016/j.partic.2022.09.009

Numerical simulations of high pressure carbon dioxide fluid fluidized beds

Wenjian Cai ^a, Xietian Xia ^b, Xiang Li ^b *, Xing Chen ^b, Zenghui Xu ^b, Huilin Lu ^a *

a School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
b China Construction Eco-Environmental Protection Technology Co., Ltd., Suzhou, 215100, China

10.1016/j.partic.2022.09.009

Volume 78, July 2023, Pages 1-15

Received 29 July 2022, Revised 4 September 2022, Accepted 23 September 2022, Available online 7 October 2022, Version of Record 2 January 2023.

E-mail: lixiang88@cscec.com; huilin@hit.edu.cn

Highlights

Abstract

Hydrodynamics of carbon dioxide fluid-particle mixtures are predicted using a low density ratio-based kinetic theory of granular flow in high pressure carbon dioxide fluid fluidized beds. A coexistence of particle waves and particle aggregates exists along bed height. The threshold to identify the occurrence of particle aggregates is suggested based on standard deviation of solid volume fractions in aggregative fluidization. The existence time fractions and frequencies of particle aggregates are predicted along axial direction. The effect of carbon dioxide fluid temperature and pressure on volume fraction and velocity distributions are analyzed at different inlet carbon dioxide velocities and particle densities in high pressure carbon dioxide fluidized beds. Simulated results indicate that the carbon dioxide-particles fluidization transits from particulate to aggregative states with the increase of inlet carbon dioxide velocities. The computed fluid volume fractions and heterogeneity indexes are close to the measurements in a high pressure carbon dioxide fluidized bed.

Graphical abstract

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