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An electrochemical setup designed for carbon dioxide solubility measurements in ionic liquids
D A V Bruzon1, G A Tapang2, I S Martinez1
1Institute of Chemistry, University of the Philippines-Diliman, Quezon City 1101, Philippines.
The Review of Scientific Instruments
|March 2, 2021
Summary
A new electrochemical setup precisely measures carbon dioxide solubility in ionic liquids. This cost-effective, vacuum-compatible system aids in determining Henry
Area of Science:
- Electrochemistry
- Materials Science
- Chemical Engineering
Background:
- Ionic liquids are promising solvents for gas capture.
- Accurate measurement of gas solubility in ionic liquids is crucial for process design.
- Existing methods for gas solubility measurement can be complex and expensive.
Purpose of the Study:
- To design and construct a novel electrochemical setup for evaluating gas solubility in ionic liquids.
- To enable simultaneous measurement of gas in both liquid and gas phases.
- To provide an economical and efficient method for determining Henry's constants.
Main Methods:
- A home-built, high-vacuum compatible glass electrochemical cell was utilized.
- Simultaneous measurement of CO2 in gas and ionic liquid phases.
- Continuous pressure monitoring and determination of Henry's constants from concentration vs. pressure plots.
Main Results:
- The setup accurately measures carbon dioxide solubility in ionic liquids.
- It allows for in situ electrochemical measurements with high vacuum compatibility.
- Henry's constants were determined, demonstrating the system's utility.
Conclusions:
- The developed electrochemical setup offers a cost-effective and reliable method for measuring gas solubility in ionic liquids.
- This technique is valuable for characterizing various gas-ionic liquid systems.
- The setup's design facilitates in situ measurements and contaminant-free experiments.
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