Ammonia capture and recycle in an ammonia cracker

A method of separating and reusing unconverted ammonia from cracked ammonia gas provided by an ammonia cracking unit, comprising:

• introducing a cracked ammonia gas stream into a water wash column, thereby producing a clean gas stream and a water-containing effluent stream,
• introducing the water-containing effluent stream into a stripping column, thereby producing a cleaned wash water stream and a recovered ammonia stream, wherein the cracked ammonia gas stream has an ammonia concentration of between 0.003 mol % and 10 mol %,
• wherein the clean gas stream has an ammonia concentration of between 1 ppm and 2500 ppm, and
• wherein at least a portion of the recovered ammonia stream is used as fuel within the ammonia cracking unit,
• wherein the cleaned wash water stream is cooled in indirect heat exchange with an ammonia feed stream, thereby producing a cooled wash water stream, and wherein the cooled wash water stream has a temperature of between 5° C. and 50° C.