Process for the ammonia production

A process for the synthesis of ammonia from a hydrocarbon feedstock, the process comprising:

• a step of primary reforming of said hydrocarbon feedstock with steam obtaining a first reformed gas,
• a step of air-fired secondary reforming of said first reformed gas, obtaining a raw gas product,
• purification of said raw gas product obtaining a make-up synthesis gas,
• conversion of said make-up synthesis gas into ammonia in a synthesis loop,
• wherein:
• said primary reforming is performed at a temperature of at least 790° C. and pressure of at least 50 bar;
• said step of secondary reforming is carried out substantially in absence of excess air relative to the stoichiometric amount;
• said make-up synthesis gas has a H2 to N2 molar ratio of 2.5 or greater but less than 3 and the process includes extraction from said loop of a purge stream, separation of a hydrogen-containing stream from said purge stream and addition of said hydrogen-containing stream to said make-up gas in order to adjust said H2 to N2 ratio.