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Flow Toolkit for Measuring Gas Diffusivity in Liquids
Jisong Zhang1,2, Andrew R Teixeira2,3, Haomiao Zhang2
1The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China.
Analytical Chemistry
|February 21, 2019
Summary
Accurately measuring gas diffusivity in liquids is essential for complex reactions. A new high-throughput flow method using a tube-in-tube reactor provides precise diffusion coefficient measurements with less than 5% deviation.
Area of Science:
- Chemical Engineering
- Physical Chemistry
- Materials Science
Background:
- Accurate gas diffusivity in liquids is crucial for modeling multiphase reaction systems.
- Existing methods for measuring gas diffusivity can be complex or time-consuming.
Purpose of the Study:
- To develop and validate a novel high-throughput flow concept for measuring gas diffusivity in liquids.
- To enable precise and efficient determination of diffusion coefficients.
Main Methods:
- Utilized a tube-in-tube reactor with a semipermeable membrane (Teflon AF-2400) for gas-liquid mass transfer.
- Employed coupled pseudosteady-state flux balances and a continuously ramped liquid flow rate.
- Integrated a single gas flow meter for real-time measurements.
Main Results:
- The method accurately measures gas diffusivity in liquids.
- Demonstrated less than 5% deviation compared to established techniques.
- The in situ measurement approach proved effective.
Conclusions:
- The presented high-throughput flow concept offers a precise and efficient method for determining gas diffusivity in liquids.
- This technique is valuable for characterizing multiphase reaction systems.
- The method's accuracy and simplicity make it a promising tool for researchers.
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