NOVELTY - System (200) for producing ammonia comprises: a source of hydrogen gas; a source of nitrogen gas; a hydrogen gas booster connected to the source of hydrogen gas; a nitrogen gas booster connected to the source of nitrogen gas; a hydrogen plenum chamber; a nitrogen plenum chamber; a synthesis reactor (206) connected to the hydrogen and nitrogen plenum chambers; and a separator for separating the ammonia from the byproduct. The separator comprises an inlet connected to the synthesis reactor, a first outlet and a second outlet connected to a recycle loop (230) for recirculating the byproduct.    USE - The system is useful for producing ammonia (claimed) from air and water.    ADVANTAGE - The system recycles the byproduct in an environment friendly manner.    DETAILED DESCRIPTION - System (200) for producing ammonia comprises: a source of hydrogen gas; a source of nitrogen gas; a hydrogen gas booster connected to the source of hydrogen gas for receiving and pressurizing the hydrogen gas; a nitrogen gas booster connected to the source of nitrogen gas for receiving and pressurizing the nitrogen gas; a hydrogen plenum chamber downstream from the hydrogen gas booster for storing the pressurized hydrogen gas; a nitrogen plenum chamber downstream from the nitrogen gas booster for storing the pressurized nitrogen gas; a synthesis reactor (206) connected to the hydrogen and nitrogen plenum chambers; and a separator for separating the ammonia from the byproduct. The synthesis reactor comprises an inlet for receiving a mixture of the pressurized hydrogen and nitrogen gases, a heating zone downstream from the inlet for heating the mixture of the hydrogen and nitrogen gases, a catalyst zone downstream from the heating zone for catalyzing a reaction of the mixture of the hydrogen and nitrogen gases to form ammonia and a byproduct, and a cooling zone downstream from the catalyst zone for cooling the ammonia and the byproduct. The separator comprises an inlet connected to the synthesis reactor for receiving the ammonia and the byproduct, a first outlet connected to an ammonia storage tank for collecting the ammonia, and a second outlet connected to a recycle loop (230) for recirculating the byproduct back to the inlet of the synthesis reactor.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a second part of an ammonia production system.    System (200)    Synthesis reactor (206)    Back pressure controller (224)    Ammonia collection tank (228)    Recycle loop. (230)