Multiphase Flow Pattern Hydrodynamics of Carbon Dioxide and Water in Microchannel Reactor

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Article
Published: Sep 15, 2025
DOI: https://doi.org/10.33093/jetap.2025.7.2.8
Keywords:
Circular microchannel, Mass transfer, Flow pattern map, Slug flow, Interfacial area

Main Article Content

Muhammad Adam Aiman Amir
Department of Chemical Engineering, Universiti Teknologi PETRONAS 32610 Seri Iskandar, Perak, Malaysia.
Mohammad Fahmi Al Alam
Department of Chemical Engineering, Universiti Teknologi PETRONAS 32610 Seri Iskandar, Perak, Malaysia.
Afiq Mohd Laziz
Department of Chemical Engineering, Universiti Teknologi PETRONAS 32610 Seri Iskandar, Perak, Malaysia.
Jens Denecke
Institute for Thermo-Fluid-Dynamics, Karlsruhe University of Applied Sciences, Karlsruhe 76133, Germany.

Abstract

The utilization of CO2 is crucial to convert waste into valuable products, such as fuels. Microchannel reactor technology has gained attention for CO2 utilization due to their higher interfacial area compared to traditional reactors. Understanding flow regimes is critical for optimizing mass transfer efficiency. Hence, this project aims to create a new flow pattern map for CO2 and water and investigate how gas bubble and liquid slug properties are affected by the change in superficial velocity. Thus, the interfacial area for each flow pattern can be observed which affects the mass transfer performance. The dimensions of flow pattern were measured, so the interfacial area could be calculated accordingly. The amount of CO2 absorbed into water was determined using the titration method. Then the liquid side mass transfer coefficient for slug flow was determined from the models proposed by van Baten and Krishna (2004). In the end, the rate of mass transfer was determined for slug flow. The results show that slug flow is formed at high gas-to-liquid ratio. Longer slug flow has higher interfacial area and more CO2 is absorbed through diffusion. A larger interfacial area contributes to higher mass transfer rate, so this proves that the microchannel is good for CO2 utilization process.

Article Details

How to Cite
[1]
M. A. A. Amir, Mohammad Fahmi Al Alam, Afiq Mohd Laziz, and Jens Denecke, “Multiphase Flow Pattern Hydrodynamics of Carbon Dioxide and Water in Microchannel Reactor”, Journal of Engineering Technology and Applied Physics, vol. 7, no. 2, pp. 65–74, Sep. 2025.
Issue
Vol. 7 No. 2 (2025): https://doi.org/10.33093/jetap.2025.7.2
Section
Regular Paper for Journal of Engineering Technology and Applied Physics
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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