公开(公告)号：US11498835B2

公开(公告)日：2022-11-15

申请号：US16071313

申请日：2017-02-28

Applicant: HALDOR TOPSØE A/S

Inventor： Annette E. Krøll Jensen ,  Christian Henrik Speth ,  Thomas Rostrup-Nielsen ,  Niels Christian Schjødt

IPC: C01B3/48 ,  C01B3/02 ,  C01B3/40

Abstract: The present invention relates to a revamp method for increasing the front-end capacity of a plant comprising a reforming section, wherein a feed is reformed in at least one reforming step to a reformed stream comprising CH4, CO, CO2, H2 and H2O a shift section wherein the reformed stream is shifted in a shift reaction in at least a high temperature shift step, said method comprising the steps of In the High temperature shift step exchanging an original Fe-based catalyst with a non-Fe-based catalyst Increasing the feed flow to the reforming section, and The HTS step is carried out at a reduced steam/dry-gas ratio (S/DG) compared to an original S/DG in the original HTS step with the original Fe-based catalyst.

公开(公告)号：US11286159B2

公开(公告)日：2022-03-29

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 ,  C01B32/50 ,  C01B32/40 ,  B01J23/00 ,  B01J23/80 ,  C01B3/48 ,  B01J23/72

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：US20210206634A1

公开(公告)日：2021-07-08

申请号：US16071313

申请日：2017-02-28

Applicant: HALDOR TOPSØE A/S

Inventor： Annette E. Krøll Jensen ,  Christian Henrik Speth ,  Thomas Rostrup-Nielsen ,  Niels Christian Schjødt

IPC: C01B3/48 ,  C01B3/02 ,  C01B3/40

Abstract: The present invention relates to a revamp method for increasing the front-end capacity of a plant comprising a reforming section, wherein a feed is reformed in at least one reforming step to a reformed stream comprising CH4, CO, CO2, H2 and H2O a shift section wherein the reformed stream is shifted in a shift reaction in at least a high temperature shift step, said method comprising the steps of In the High temperature shift step exchanging an original Fe-based catalyst with a non-Fe-based catalyst Increasing the feed flow to the reforming section, and The HTS step is carried out at a reduced steam/dry-gas ratio (S/DG) compared to an original S/DG in the original HTS step with the original Fe-based catalyst.