Patent ID: 8545727

Claim:
A process for producing ammonia synthesis gas from a hydrocarbon-containing feedstock, the process comprising the steps of steam-reforming of said hydrocarbon-containing feedstock in a primary reformer, wherein all feedstock is supplied to said primary reformer, obtaining a partially reformed gas stream, and secondary reforming of said partially reformed gas stream in a secondary reformer, operating with air in excess, wherein: the primary reforming and the secondary reforming are operated at a pressure of at least 35 bar; the product syngas at the output of the secondary reforming is cooled and subject to catalytic medium-temperature shift, converting CO into CO 2 and H 2 , said medium-temperature shift being carried out on a copper-based catalyst at a substantially constant temperature in the range 220-320° C.; downstream said medium-temperature shift, CO 2 is removed from the syngas by physical absorption; wherein the steam-to-carbon ratio in the primary reformer is less than 2.7.