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1. WO2011010112 - SEPARATION OF CARBON DIOXIDE AND HYDROGEN

Publication Number WO/2011/010112
Publication Date 27.01.2011
International Application No. PCT/GB2010/001406
International Filing Date 23.07.2010
IPC
B01D 53/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
F25J 3/06 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GASES OR GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT
3Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification
06by partial condensation
C01B 3/52 2006.01
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF
3Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
50Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
52by contacting with liquids; Regeneration of used liquids
C10K 1/00 2006.01
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
KPURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
1Purifying combustible gases containing carbon monoxide
CPC
B01D 2257/304
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2257Components to be removed
30Sulfur compounds
304Hydrogen sulfide
B01D 2257/504
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2257Components to be removed
50Carbon oxides
504Carbon dioxide
B01D 53/002
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols,
002by condensation
B01D 53/1462
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols,
14by absorption
1456Removing acid components
1462Removing mixtures of hydrogen sulfide and carbon dioxide
B01D 53/1468
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols,
14by absorption
1456Removing acid components
1468Removing hydrogen sulfide
C01B 17/167
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
17Sulfur; Compounds thereof
16Hydrogen sulfides
167Separation
Applicants
  • BP ALTERNATIVE ENERGY INTERNATIONAL LIMITED [GB]/[GB] (AllExceptUS)
  • MITSUBISHI HEAVY INDUSTRIES LIMITED [JP]/[JP] (AllExceptUS)
  • FORSYTH, Jonathan Alec [GB]/[GB] (UsOnly)
  • MORI, Yasushi [JP]/[JP] (UsOnly)
  • OGURA, Kazumasa [JP]/[JP] (UsOnly)
Inventors
  • FORSYTH, Jonathan Alec
  • MORI, Yasushi
  • OGURA, Kazumasa
Agents
  • MURRAY, Elisabeth Anne
Priority Data
PCT/GB2009/00181024.07.2009GB
PCT/GB2009/00238306.10.2009GB
PCT/GB2009/002884 16.12.2009GB
PCT/GB2009/002895 16.12.2009GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SEPARATION OF CARBON DIOXIDE AND HYDROGEN
(FR) SÉPARATION DE DIOXYDE DE CARBONE ET D'HYDROGÈNE
Abstract
(EN)
A process is described for separating a gas stream containing hydrogen sulfide (H2S) impurities into a hydrogen (H2) rich vapour stream, a carbon dioxide (CO2) stream and an H2S rich vapour stream in an apparatus that comprises a compression and/or cooling system comprising at least one compressor and/or heat exchanger and a gas-liquid separator vessel, and an H2S recovery unit. In examples, the process comprises the steps of: (a) feeding the gas stream to the compression and/or cooling system such that carbon dioxide in the gas stream condenses to form a two-phase stream; (b) passing the two-phase stream either directly or indirectly to a gas-liquid separator vessel and withdrawing a hydrogen rich vapour stream and a liquid CO2 stream containing dissolved H2S impurities from the separator vessel; (c) passing the liquid CO2 stream containing dissolved H2S impurities to an H2S recovery unit comprising an evaporator/condenser in which the CO2 and H2S are vaporised and an H2S absorber in which the gaseous H2S and CO2 are separated. wherein the two phase stream passed to the separator is at a pressure of from 80 bar to 400 bar. In some applications, the pressure of the H2S recovery unit is at least 30bar. In a preferred example, residual CO2 in the hydrogen rich vapour stream is removed in an optional step by solvent extraction in a CO2 absorber most preferably in a configuration where the H2S and CO2 absorbers share the same (preferably methanol) solvent.
(FR)
L'invention porte sur un procédé pour la séparation d'un courant gazeux contenant des impuretés de type sulfure d'hydrogène (H2S) en un courant de vapeur riche en hydrogène (H2), un courant de dioxyde de carbone (CO2) et un courant de vapeur riche en H2S dans un appareil qui comprend un système de compression et/ou refroidissement, comprenant au moins un compresseur et/ou échangeur de chaleur et une cuve de séparateur gaz-liquide, et une unité de récupération d'H2S. Dans des exemples, le procédé comprend les étapes consistant à : (a) introduire le courant gazeux dans le système de compression et/ou refroidissement de façon à ce que le dioxyde de carbone présent dans le courant gazeux se condense pour former un courant à deux phases ; (b) faire passer le courant à deux phases soit directement soit indirectement vers une cuve de séparateur gaz-liquide et soutirer de la cuve du séparateur un courant de vapeur riche en hydrogène et un courant de CO2 liquide contenant des impuretés de type H2S dissoutes ; (c) faire passer le courant de CO2 liquide contenant des impuretés de type H2S dissoutes vers une unité de récupération d'H2S comprenant un évaporateur/condenseur dans lequel le CO2 et l'H2S sont vaporisés et un absorbeur d'H2S dans lequel l'H2S et le CO2 gazeux sont séparés ; le courant à deux phases amené à passer vers le séparateur étant à une pression de 80 bar à 400 bar. Dans certaines applications, la pression de l'unité de récupération d'H2S est d'au moins 30 bar. Dans un exemple préféré, le CO2 résiduel présent dans le courant de vapeur riche en hydrogène est enlevé dans une étape facultative par extraction au solvant dans un absorbeur de CO2, mieux encore dans une configuration où les absorbeurs d'H2S et de CO2 utilisent le même solvant (de préférence du méthanol).
Also published as
Latest bibliographic data on file with the International Bureau