Dissolving carbon dioxide from air without dissolving any other gases.

In summary, the conversation discusses a science research project idea for a machine that dissolves CO2 using a pump. The problem is finding a liquid solution to effectively dissolve the CO2. The use of water and monoethanolamine is mentioned, as well as the concept of Henry's law for dissolution and the possibility of using any base to dissolve CO2. A relevant source is also provided for further information.
  • #1
nst.john
163
1
Hello,

Me and two other people are doing a science research competition for high school students and for our project we thought of a machine that takes in air through a pump and dissolves CO2 and only CO2. The problem is I don't know what to put in for a solution or pure liquid that would dissolve the CO2. I thought about water but I don't know how to find the pressure needed to dissolve a gas, and also heard about monoethanolamine which dissolves CO2 but don't know how to make it or if it would be very effective. If you can either give me an equation or method to finding the pressure needed to dissolve gases in water, or if MEA is effective or any other methods to do this that would be great.

Thanks!
 
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  • #2
  • #3
For a simple dissolution check the Henry's law. In the case of CO2 things get more complicated, as CO2 reacts with water creating carbonic acid, if it gets neutralized, more CO2 can be dissolved. That's more or less how MEA works, but it is also possible with any base - it is just the further separation that can make some substances better.

Also, see http://www.sciencedirect.com/science/article/pii/036031999500007Z
 

1. How is carbon dioxide removed from air without affecting other gases?

The process of removing carbon dioxide from air without affecting other gases is known as carbon dioxide scrubbing. This can be done through a variety of methods, such as adsorption, chemical absorption, and membrane separation. These methods specifically target carbon dioxide molecules, allowing them to be separated and removed from the air while leaving other gases intact.

2. Why is it important to remove carbon dioxide from air without dissolving other gases?

Carbon dioxide is a greenhouse gas that contributes to climate change. It is important to remove it from the atmosphere in order to reduce its impact on the environment. However, other gases in the atmosphere are necessary for various biological processes and cannot be removed without causing harm. Therefore, it is important to find a way to selectively remove carbon dioxide without affecting other gases.

3. What are the potential benefits of dissolving carbon dioxide from air without affecting other gases?

The potential benefits of this process include reducing the amount of carbon dioxide in the atmosphere, which can help mitigate the effects of climate change. It can also be used in industrial applications, such as carbon capture and storage, to reduce emissions and decrease the impact of human activities on the environment.

4. Are there any challenges or limitations to dissolving carbon dioxide from air without dissolving other gases?

One of the main challenges is finding a method that is efficient and cost-effective. Many of the current methods for carbon dioxide scrubbing are energy-intensive and can be expensive to implement on a large scale. In addition, there may be limitations in terms of the capacity and efficiency of these methods, which may require further research and development.

5. How can we ensure that only carbon dioxide is removed from air without affecting other gases?

In order to ensure that only carbon dioxide is removed from air without affecting other gases, it is important to carefully design and monitor the process. This may involve using specific materials or chemicals that target carbon dioxide, as well as implementing control measures to prevent the removal of other gases. Regular testing and quality control can also help ensure the effectiveness and selectivity of the process.

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