Time-dependent hydrodynamics of bubble columns

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science Pub Date : 2025-02-20 DOI:10.1016/j.ces.2025.121365

Martín Obligado , Mark Terentyak , Alain Cartellier , Zhujun Huang , Marek C. Ruzicka , Sandra Orvalho

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Abstract

Bubble column reactors are widely used in chemical engineering. They often operate in the heterogeneous regime combining thus high gas concentrations and strong velocity fluctuations. Furthermore, processes are usually dynamic as the injected gas flowrate may be unsteady, they can suffer sudden change of operating parameters, etc…

We present experimental results for six different bubble columns (with 5 different column diameters) in both the homogeneous and the heterogeneous regime. We cover two different time-dependent situations. First, the startup of the bubble column is considered. This unsteady regime consists on injecting a fixed gas flowrate starting from zero. The time that bubbles require to reach the free surface and the duration of the unsteady regime are then analyzed. Later, we focus on the fluctuations of several quantities (void fraction, correlation times…) within stable operating conditions. Our results show that even within steady gas injection conditions, all studied parameters present significant fluctuations.

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.