Citation: Haoyang Wang, Ronghao Zhang, Yanlun Ren, Li Zhang. A convenient method for measuring gas-liquid volumetric mass transfer coefficient in micro reactors[J]. Chinese Chemical Letters, ;2024, 35(4): 108833. doi: 10.1016/j.cclet.2023.108833 shu

A convenient method for measuring gas-liquid volumetric mass transfer coefficient in micro reactors

School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China

lzhang@ecust.edu.cn

Received Date: 23 May 2023
Revised Date: 12 July 2023
Accepted Date: 24 July 2023
Available Online: 26 July 2023

Figures(4)

The research on gas-liquid multiphase reactions using micro reactors is becoming increasingly widespread, given their excellent mass transfer performance. Establishing an accurate and reliable method to measure the gas-liquid mass transfer performance of micro reactors is crucial for evaluating and optimizing the design of micro reactor structure. In this paper, the physical absorption method of aqueous solution-CO₂ and the chemical absorption method of sodium carbonate solution-CO₂ were proposed. By analyzing the chemical reaction equilibrium during the absorption process, the relationship between the mass transfer of CO₂ and the solubility of hydroxide ions in the solution was established, and the total gas-liquid mass transfer coefficient was immediately obtained by measuring the pH value. The corresponding testing platform and process have been established based on the characteristics of the proposed method to ensure fast and accurate measurement. In addition, the chemical absorption method takes into account temperature factors that were not previously considered. The volumetric mass transfer coefficient measured by these two methods is in the same range as those measured by other methods using the same microchannel structure in previous literature. The methods have the advantages of low equipment cost, faster measurement speed, and simpler procedures, which can facilitate its wide application to the evaluation of the mass transfer performance and hence can guide the structure optimization of microchannel reactors.
- Volumetric mass transfer coefficient measurement,
- Gas-liquid two phase,
- Micro reactors,
- Physical absorption,
- Chemical absorption
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沈阳化工大学材料科学与工程学院沈阳 110142