公开(公告)号：US20200180952A1

公开(公告)日：2020-06-11

申请号：US16620150

申请日：2018-06-28

Applicant: HALDOR TOPSØE A/S

Inventor： Annette E. KRØLL JENSEN ,  Christian Henrik SPETH ,  Thomas ROSTRUP-NIELSEN

IPC: C01B3/02 ,  C01B3/48 ,  B01J23/00 ,  B01J23/80 ,  C01B32/40 ,  C01B32/50

Abstract: In a process for the production of ammonia synthesis gas from a hydrocarbon-containing feedstock, comprising steam reforming of the feedstock and treatment of the synthesis gas obtained, the shift of the synthesis gas comprises two shift steps, both including stable catalysts, whereby the formation of hazardous by-products is avoided or at least reduced to an acceptable low level. The two shift steps can both be HTS, or they can be one HTS and one LTS or one HTS and one MTS. The catalyst used in the HTS and the LTS steps is based on zinc oxide and zinc aluminum spinel, and the catalyst used in the MTS and the LTS steps can be based on copper.

公开(公告)号：US20180370810A1

公开(公告)日：2018-12-27

申请号：US16062259

申请日：2016-11-15

Applicant: HALDOR TOPSØE A/S

Inventor： Annette E. KRØLL JENSEN ,  Per Juul DAHL

IPC: C01C1/04

Abstract: In a process for the production of ammonia in at least two reaction systems, in which ammonia is produced from a portion of the synthesis gas in each of the systems with a part-stream being withdrawn, the make-up gas is essentially inert-free, the downstream system is at the same pressure or at a higher pressure than the upstream system and the make-up gas is sent once through a make-up gas (MUG) converter unit, the residual synthesis gas coming from the MUG converter unit is optionally pressurized to a higher pressure before being sent to an inert-free synthesis loop. This way, an economically attractive production of ammonia is feasible with synthesis gases not containing inerts.