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International Society for Industrial Process Tomography

8th World Congress on Industrial Process Tomography

Effect of Packings on Gas Distribution and Holdup in a Bubble Column

Jiabin Jia, Huarui Wang, Yunjie Yang, Bill Buschle and Mathieu Lucquiaud

Agile Tomography Group, School of Engineering, University of Edinburgh The Kings Buildings, The Univerisity of Edinburgh, EH9 3JL, Edinburgh, UK jiabin.jia@ed.ac.uk

ABSTRACT

Random or structured packing is always included in the chemical reaction columns to increase the contact area between phases and thus improve reaction efficiency. Knowledge of how packing types and sizes affect the gas distribution and overall gas holdup is critical parameters for the effective design and operation of industrial process, such as absorption, stripping and distillation. In this work, the gas distribution and overall gas holdup are measured in-situ using Electrical Resistance Tomography (ERT). The effect of packing on these parameters is studied. Experimental results show that the presence of packing considerably changes the gas distribution and holdup. Additionally, the simulation and experiment results show that ERT is able to quantitatively determine the volume fraction with up to 5.2% relative error against the true value. All of these facts suggest that ERT is an efficient quantitative imaging tool for the real-time measurement of complex two-phase flows.

Keywords Electrical resistance tomography (ERT), Gas-liquid two-phase flow, Gas distribution and holdup, Packed Column

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