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제목 Process for producing ammonia synthesis gas
작성자 KCRC 등록일 2018-10-08 조회수 31

 

Process for producing ammonia synthesis gas

문헌번호

US 10087074 B2 (2018.10.02)

출원번호

13/805016 (2011.05.12)

출원인

Casale SA

발명자

Ermanno Filippi | Francesco Baratto | Sergio Panza | Raffaele Ostuni

Current IPC

(Main)

C01B-003/02

 

 

우선권번호

EP 2010-168495 (2010.07.06)

 

 

요약

A process for producing ammonia synthesis gas from a hydrocarbon-containing feedstock, with steps of primary reforming, secondary reforming with an oxidant stream, and further treatment of the synthesis gas including shift, removal of carbon dioxide and methanation, wherein the synthesis gas delivered by secondary reforming is subject to a medium-temperature shift (MTS) at a temperature between 200 and 350° C., and primary reforming is operated with a steam-to-carbon ratio lower than 2. A corresponding method for revamping an ammonia plant is disclosed, where an existing HTS reactor is modified to operate at medium temperature, or replaced with a new MTS reactor, and the steam-to-carbon ratio in the primary reformer is lowered to a value in the range 1-52, thus reducing inert steam in the flow rate trough the equipments of the front-end.

대표청구항

1. A process for producing ammonia from an ammonia synthesis gas obtained from a hydrocarbon-containing feedstock, the process comprising the steps of: pre-reforming said feedstock;primary reforming all of said feedstock with steam to partially reform said feedstock, wherein said primary reforming is operated with a steam-to-carbon ratio lower than 2;secondary reforming a partially reformed gas stream delivered from said primary reforming step with an oxidant stream, wherein the ammonia synthesis gas produced by said secondary reforming is directly subject to a medium-temperature shift in a medium-temperature shift reactor over a copper-based catalyst at a temperature between 200 and 350° C. to convert CO into CO2, obtaining a first shifted gas;purification of the first shifted gas involving at least a further shift conversion of CO to CO2, obtaining a second CO2 containing shifted gas and subsequent removal of carbon dioxide from the second shifted gas, obtaining a purified ammonia synthesis gas, andreacting the purified ammonia synthesis gas to form ammonia,wherein the ammonia synthesis gas comprises hydrogen (H2) and nitrogen (N2) in a suitable ratio of about 3:1, andwherein the overall feedstock required for producing the ammonia synthesis gas according to the process is fed to the pre-reforming step, and said pre-reforming step of said feedstock is carried out before the step of primary reforming.

WIPS 패밀리

AU2011276058B2 | BR112013000357A2 | CA2800285A1 | CL2012003572A1 | CN102971251B | EG27127A | EP2404869A1 | EP2590893B1 | IN00777/CHENP/2013 | MX2012015053A | MY161908A | RU0002565321C2 | UA108384C2 | US10087074B2 | WOWO2012-004032A1

 

이전글/다음글
첨부파일 us00010087074b2p.pdf
이전글 Method for reducing carbon dioxide and device used therefor
다음글 美 DOE, 차세대 CCS 기술 개발에 3,000만 USD 투입