Process for making ammonia

A method for producing ammonia, the method comprising:

• reacting at least a portion of a nitrogen feed gas (N2) and at least a portion of a hydrogen feed gas (H2) in the presence of a catalyst in a reactor while maintaining a reaction pressure of from about 9 atmospheres to about 100 atmospheres and a reaction temperature of from about 330° C. to about 500° C. to form ammonia (NH3), wherein unreacted nitrogen gas (N2), unreacted hydrogen gas (H2), and the ammonia (NH3) form a reaction mixture;
• cycling between an absorption phase and a desorption phase, wherein the absorption phase comprises:
• flowing at least a portion of the reaction mixture to an absorbent comprising a porous support structure while maintaining one or both of an absorption pressure and an absorption temperature at the absorbent to selectively absorb at least a portion of the ammonia from the reaction mixture into the absorbent;
• and following the selective absorbing, recycling unreacted nitrogen gas and unreacted hydrogen to the reactor;
• and wherein the desorption phase comprises:
• changing one or both of the pressure at the absorbent to a desorption pressure or the temperature at the absorbent to a desorption temperature so that at least a portion of ammonia absorbed in the absorbent is desorbed from the absorbent;
• and withdrawing at least a portion of the ammonia desorbed from the absorbent as an ammonia product stream.