Lab preparation of dinitrogen

I think he is asking how to increase the purity of Dinitrogen gas produced as of reaction of NH₄Cl with NaNO₃, and he stated that he need to remove the byproducts.

 

I conjecture that if we mix NH₄Cl and NaNO₃, the resultant compound will yield NH₄NO₃, which, is an explosive I suppose. Gently warming the mixture will produce N₂O, not N₂.

If you want to produce N₂, try making NH₄NO₂.

 

Just gently warm the above mentioned compound, as it is not an innocent compound. In fact, it is an explosive material.

Heating it gently will yield N₂ and water. If NO is formed (I don't know how), you can pass this gas first through a supply of oxygen. Oxygen will convert NO to NO₂. Now pass this mixture through water. NO₂ is soluble in water, yielding Nitrous and Nitric acid.

Nitric acid formed in the reaction will just stay in the solution, no need to worry except when handling the solution. You got yourself a good yield of Dinitrogen.

In my opinion, if you want high lab yield of Dinitrogen gas, you should heat alkali metal azides.