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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?

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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