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Modeling partition dynamics through multiple interfaces and characterization by wavelength modulation spectroscopy
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DOI：10.1016/j.sna.2020.112339.png)
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Abstract
En 中文
In this paper, a phenomenological model is presented for the molecular transport across multiple interfaces, involving liquid/gas boundaries or gas/gas phases separated by a thin membrane. A simple rate equation model is proposed on the assumption that diffusion effects in the different phases can be neglected. The model is applied for the characterization of the desorption of acetylene molecules from transformer oil, by wavelength modulation spectroscopy. A semi-quantitative analysis shows that the model yields a good prediction of the time evolution of the desorption process, either for a single or for a double interface configuration. The study originally directed to applications in dissolved gas analysis for surveillance in substations, has broader applicability in the characterization of sorption and desorption processes of other liquid/gas systems. (c) 2020 Elsevier B.V. All rights reserved.
Keywords:
Liquid-gas interface
Wavelength modulation spectroscopy
Acetylene
Membrane
Near infrared
Solubility
Partition coefficient
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