Portable pressure swing adsorption method and system for fuel gas conditioning

A fuel gas conditioning system, comprising:

• a pressure swing adsorption (PSA) system configured to be fluidly coupled to at least a portion of a rich natural gas stream, the PSA system comprising a plurality of adsorbent beds and configured to condition the at least the portion of the rich natural gas stream and produce a high-quality fuel gas and gaseous separated heavier hydrocarbons when so fluidly coupled;
• a product end of the plurality of adsorbent beds configured to be fluidly coupled to a fuel gas line, wherein the high-quality fuel gas is discharged from the product end and supplied to the fuel gas line when so fluidly coupled;
• and
• a feed end of the plurality of adsorbent beds configured to be fluidly coupled to the at least the portion of the rich natural gas stream, wherein the fuel gas conditioning system is configured such that the gaseous separated heavier hydrocarbons so produced are recirculated into one of the rich natural gas stream or a raw natural gas stream.