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# How to convert Carbon dioxide into Carbon and Oxygen?

How can $\small\cf{CO2}$ be converted into Carbon and Oxygen?

$\cf{CO2 -> C + O2}$

Alternatively:

$\cf{CO2 + ? -> C + O2}$

I know that plants are able to do this. But I'm wondering if it can be done without using plants?

### 2 Answers

Use Exploit the fact that burning magnesium continues to burn in atmosphere of carbon dioxide. $${\ce{Mg}}+\color{\red}{\ce{CO2}}\to \ce{MgO}+\color{\red}{\ce{C}}$$

Now you can electrolyse your mixture :

$$\ce{MgO}+\ce{H2O}\to \ce{Mg(OH)2}$$

$$\ce{4OH-}\to\color{\red}{\ce{ O2}}+\ce{2H2O}+\ce{4e-}$$

Electrolysis of carbonates in anhydrous environment can produce either $CO + O_2$ or $C + O_2$, [1] depending on conditions. A base, remaining in electrolyzed liquid then can capture carbon dioxide from other sources and be recirculated.

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# How to convert Carbon dioxide into Carbon and Oxygen?

How can $\small\cf{CO2}$ be converted into Carbon and Oxygen?

$\cf{CO2 -> C + O2}$

Alternatively:

$\cf{CO2 + ? -> C + O2}$

I know that plants are able to do this. But I'm wondering if it can be done without using plants?

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Use Exploit the fact that burning magnesium continues to burn in atmosphere of carbon dioxide. $${\ce{Mg}}+\color{\red}{\ce{CO2}}\to \ce{MgO}+\color{\red}{\ce{C}}$$

Now you can electrolyse your mixture :

$$\ce{MgO}+\ce{H2O}\to \ce{Mg(OH)2}$$

$$\ce{4OH-}\to\color{\red}{\ce{ O2}}+\ce{2H2O}+\ce{4e-}$$

How can we start burning magnesium in CO2? - Kartik Jul 6 at 17:09

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