Impacts of solid physical properties on the performances of a slurry external airlift loop reactor integrating mixing and separation

作     者：Tian Zhang Qingshan Huang Shujun Geng Aqiang Chen Yan Liu Haidong Zhang Tian Zhang;Qingshan Huang;Shujun Geng;Aqiang Chen;Yan Liu;Haidong Zhang

作者机构：School of Chemical EngineeringHebei University of TechnologyTianjin 300130China Key Laboratory of BiofuelsQingdao Institute of Bioenergy and Bioprocess Technology(QIBEBT)Chinese Academy of Sciences(CAS)Qingdao 266101China Dalian National Laboratory for Clean Energy(DNL)Dalian 116023China Innovation Academy for Green ManufactureInstitute of Process EngineeringCASBeijing 100190China Synthetic Biology Technology Innovation Center of Shandong ProvinceQingdao 266101China Shandong Energy InstituteQingdao 266101China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2023年第55卷第3期

页      面：1-12页

核心收录：

学科分类：080706[工学-化工过程机械] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by the National Natural Science Foundation of China (21878318, 22108285) the DNL Cooperation Fund, CAS (DNL201902) “Transformational Technologies for Clean Energy and Demonstration”, Strategic Priority Research Program of the Chinese Academy of Sciences (CAS) (XDA21060400) Shandong Energy Institute, Single-Cell Center Project (SCZ-16, SCZ17) Director Innovation Fund of Synthetic Biology Technology Innovation Center of Shandong Province (sdsynbio-2020-ZH-02) 

主　　题：Slurry reactor Hydrodynamics Particle Mixing Solid physical property 

摘      要：Solid physical properties are vital for the design, optimization, and scale-up of gas–liquid–solid multiphase reactors. The complex and interactional effects of the solid physical properties, including particle diameter, density, wettability, and sphericity, on the hydrodynamic behaviors in a new external airlift loop reactor(EALR) integrating mixing and separation are decoupled in this work. Two semi-empirical equations are proposed and validated to predict the overall gas holdup and liquid circulating velocity satisfactorily, and then the individual influence of such solid physical properties is further investigated. The results demonstrate that both the overall gas holdup in the riser and the liquid circulating velocity in the downcomer increase with the contact angle, but decrease with particle size, density, and ***, the impact of the particle size on the liquid circulating velocity is also profoundly revealed on a micro-level considering the particle size distribution. Moreover, the axial solid concentration distribution is discussed, and the uniformity of the slurry is described by the mixing index of the solid particles. The results show that a more homogeneous mixture can be achieved by adding finer particles other than attaining violent turbulence. Therefore, this work lays a foundation for the design, scale-up, and industrialization of the EALRs.