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JP7257903
Removing contaminants from synthesis gas.
Patent Number: EP0661372
Publication date: 1995-07-05
Inventor(s): Heyman, Eva Christina (NL), Zuideveld, Pieter Lammert (NL)
Applicant(s): Shell Int Research (NL)
Requested Patent: JP7257903
Application Number: EP19930203726 19931230
Priority Number(s): EP19930203726 19931230
Priority number : 93 93203726
Priority date : 30.12.1993
Priority country : EP
IPC Classification: C10K1/10; C10K1/34; C01B3/52; C01B3/54
EC Classification: B01D53/14B, C01B3/34, C01B3/58, C01B3/52, C10K1/10, C10K1/34
Equivalents: CA2139166, CN1040766B, CN1108294, DE69416804D, ES2130349T, ZA9410341

Abstract

Process of removing contaminants such as ammonia from synthesis gas obtained from partly oxidizing in a gasification reactor (2) a carbonaceous feed (1) comprising the steps of scrubbing (18) the synthesis gas with water (20) to obtain a first ammonia-containing aqueous stream (22) and a partly treated synthesis gas (24); stripping (25) the first ammonia-containing aqueous stream (22) with steam (26) to obtain an ammonia-containing gaseous stream (30) and a treated aqueous stream (20); scrubbing the ammonia-containing gaseous stream (35) with water (37) to obtain a treated gaseous stream (38) and a second ammonia-containing aqueous stream (40); and supplying the second ammonia-containing aqueous stream (40) to the gasification reactor (2).

PURPOSE: To simply remove ammonia from an ammonia-containing gas stream by improving a well-known method.

CONSTITUTION: In the method removing contaminants such as ammonia from the synthesis gas obtained by partially oxidizing a carbonaceous feed 1 in a gasification reactor 2, the synthesis gas is washed 18 with water 20 to obtain the first ammonia-containing aqueous stream 22 and a partially treated synthesis gas 24, and the ammonia-containing aqueous stream 22 is stripped 25 with steam 26 to obtain an ammonia-containing gas stream 30 and a treated aqueous stream 20, and the ammonia-containing gas stream 30 is washed with water 37 to obtain a treated gas stream 38 and the second ammonia-containing aqueous stream 40, and moreover, the second ammonia-containing aqueous stream 40 is supplied to the gasification reactor 2.