Volume 88
您当前的位置:首页 > 期刊文章 > 过刊浏览 > Volumes 84-95 (2024) > Volume 88
Zhang, Q., Fu, L., Xu, G., & Bai, D. (2024). Temperature influence on minimum fluidization velocity: Complexity, mechanism, and solutions. Particuology, 88, 344-349. https://doi.org/10.1016/j.partic.2023.10.008
Temperature influence on minimum fluidization velocity: Complexity, mechanism, and solutions
Qingjin Zhang a b, Liangliang Fu a c, Guangwen Xu a, Dingrong Bai a *
a Key Laboratory on Resources Chemicals and Material of Ministry of Education, Shenyang University of Chemical Technology, Shenyang 110142, China
b School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110142, China
c School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China
10.1016/j.partic.2023.10.008
Volume 88, May 2024, Pages 344-349
Received 12 September 2023, Revised 5 October 2023, Accepted 15 October 2023, Available online 2 November 2023, Version of Record 24 November 2023.
E-mail: drbai@syuct.edu.cn

Highlights

• Temperature impacts minimum fluidization velocity Umf via competition between hydrodynamic and interparticle forces.

• Temperature effects on Umf are achieved by varying gas, bed voidage, and solid particle characteristics.

• No correlation is available to predict Umf variation accurately over a wide temperature range.

• A better understanding of interparticle forces is required to develop reliable Umf correlations.


Abstract

Fluidized-bed reactors are widely employed in various high-temperature industrial processes. Thus, it is crucial to understand the temperature effect on various fluidization phenomena, specifically the minimum fluidization velocity (Umf) that governs various aspects of fluidized bed behavior. In this study, we comprehensively analyze Umf data from the literature to unravel the complexity and underlying mechanisms of temperature influence on this critical velocity. The research examines experimental data encompassing a wide range of temperatures, pressures, and solid particles. The analysis reveals that the influence of temperature on Umf is fundamentally determined by the relative importance of hydrodynamic forces and interparticle forces within fluidized beds and is realized by three distinctive temperature-induced changes: gas properties, bed voidage, and physiochemical characteristics of particles. On this basis, an equation is derived to enable predictions of temperature influences on the minimum fluidization velocity under broad temperature conditions.

Graphical abstract
Keywords
High-temperature gas-solids fluidized beds; Minimum fluidization velocity; Hydrodynamic forces; Interparticle forces; Bed voidage