a system for regenerating an adsorbent in an off - line adsorption chamber including : a heat exchanger configured to exchange heat from a first fluid coming from a compressor and a second fluid , wherein only a portion of the first fluid flows through the heat exchanger when the first fluid is gas ; a conduit providing fluid communication between the second fluid exiting the exchanger and an off - line adsorption chamber ; an adsorbent in the off - line adsorption chamber ; and an outlet to the off - line adsorption chamber configured to outlet the second fluid from the off - line adsorption chamber .