Nitrogen could be stored in high pressure cylinders, put the expansion ratio would be poor. Nitrogen is almost always transported and stored in liquid form at a relatively low pressure, but it requires very expensive vacuum insulated tanks and even then the heat gain requires the tanks to continually vent waste gas. I you don't use the product quickly enough, a great deal is lost to venting. Liquid nitrogen exists at minus 321 degree F, so it is also dangerous to handle.

https://en.wikipedia.org/wiki/Liquid_nitrogen