# How to obtain nitrogen using only homemade utilities?

I am now constructing a RC plane. I would like to fill the tires of the landing gear with nitrogen to avoid combustion of oxygen during landing. I would therefore like to obtain a small amount of nitrogen using (only) home-made utilities. How can it be done?

• You can buy argon or nitrogen in a gas cylinder. It isn't prohibitively costly. However if you only need a gas not supporting oxidation, there is a lot easier way: mix backing soda with vinegard and pass the product through a filter to stop water drops. The reasulting gas is safe for anything short of active metals. – permeakra Aug 24 '15 at 13:12

• the equivalent of $\ce{CO2}$ from the combustion process,
This already is not sustaining any combustion. But if you're a purist or want to use $\ce{N2}$ because it is lighter than $\ce{CO2}$, to remove the $\ce{CO2}$ you could use something like "roasted limestone", i.e. the stuff from you water kettle, which you heat so that you get lime, which then binds with the $\ce{CO2}$ to revert to limestone $\ce{CaCO3}$. Now you have something, I'd assume, like 98% nitrogen and surely to few traces of $\ce{O2}$ to cause any harm to your equipment. Of course, I'd buy bottled $\ce{N2}$, but for the sake of using household implements only, this might do the trick.
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