Issue 2, 2017

Investigation of dynamic surface tension in gas–liquid absorption using a microflow interfacial tensiometer

Abstract

Surface tension is an important parameter that dominates gas–liquid dual-phase flow. In this study, the dynamic surface tension caused by changing substance concentrations at the gas–liquid interface was determined using a microflow interfacial tensiometer. The instantaneous surface tensions at the bubble rupturing moment in a CO2 chemical absorption process were determined from the bubble diameter. The mass transfer across the interface and the chemical reaction within the liquid caused up to a 7.2 mN m−1 reduction in the surface tension, as compared with that in a process without absorption, and the decrease in the surface tension can be expressed into a Langmuir–Szyszkowski equation of the CO2 interfacial concentration. This study clarifies the effect of chemical absorption on multiphase fluid dynamics parameters, which is less discussed in chemistry and chemical engineering studies.

Graphical abstract: Investigation of dynamic surface tension in gas–liquid absorption using a microflow interfacial tensiometer

Article information

Article type
Paper
Submitted
15 okt 2016
Accepted
13 feb 2017
First published
13 feb 2017

React. Chem. Eng., 2017,2, 232-238

Investigation of dynamic surface tension in gas–liquid absorption using a microflow interfacial tensiometer

L. Yang, G. Liu, S. Luo, K. Wang and G. Luo, React. Chem. Eng., 2017, 2, 232 DOI: 10.1039/C6RE00191B

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