Why purify air from carbon dioxide in large-scale nitrogen production

[1/2"]

In large scale preparation of nitrogen from liquefied air why do we purify the air from carbon dioxide ?
what problem does it create?
I would be happy if anyone replies.
Thank you!

 

[mgb_phys]

What does CO2 do at about -80C ?

 

[1/2"]

Thanks !
I have found it out!

 

[Borek]

For the same reason we first dry it out

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