Yes natural gas can be put into tanks and some vehicles do run on natural gas so the natural gas would have to be put into tanks on the vehicles to allow the vehicles to run off of natural gas.
The natural is compressed into the tanks through a natural gas compressor.
The natural gas that is stored in or put into tanks is called compressed natural gas and works sorta like compressed air that gets stored in air tanks.
The natural gas goes through a natural gas compressor and then gets placed into the tanks at pressures to allow the natural gas to come out of the tanks and into the engines or whatever it needs to go into.