One of three common methods to remove nitrogen from natural gas. The pressure swing adsorption process utilizes a carbon bed technology to separate the nitrogen from the hydrocarbons and can perform effectively even where there are large amounts of nitrogen in the feed stream. A particular advantage of the pressure swing adsorption process is its scalability. It can be used in small plants designed to handle 100,000 cubic feet of gas per day as well as plants processing volumes in the millions of cubic feet.