CO2 Absorption with Amines: Demo for Students

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The discussion focuses on a student's interest in demonstrating the absorption of CO2 using amines, specifically exploring which amine would be suitable for this purpose. Ethanolamine is identified as a common choice for CO2 scrubbing. The conversation raises questions about the practical aspects of the demonstration, particularly regarding the specific type of amine to use and the method for releasing CO2 from the amine. While electric shock is mentioned as a potential method for CO2 release, there is uncertainty about how to safely implement this in a high school setting. Heating is suggested as a more reliable alternative for releasing CO2 from the amine. Overall, the discussion emphasizes the need for clarity on the appropriate amine selection and effective methods for demonstrating CO2 capture and release.
mishima
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Hi, I have a student curious about amines absorbing CO2. He would like to construct a small demonstration capable of capturing CO2 with amines. He has also heard that electric shock is able to release the CO2 from the amines and would like to see this as well. There are few things puzzling me about this.

First, amines are a class of compounds, and I wonder what specific one would be suitable for this demonstration.

Second, if we did succeed in capturing CO2, how (practically) would an electric shock be delivered to the liquid amine in a way to release it?

I should mention we have a good supply of chemical stock (for a high school), but not many commercial apparatus available.
 
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The standard amine for CO2 scrubbing in the literature I'm familiar with is ethanolamine. I don't know too much about releasing CO2 from the amine, though. Heating will probably work.
 

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