EP 4126307 A1 20230208 - METHOD FOR ELECTROCHEMICAL HYDROGEN SEPARATION FROM NATURAL-GAS PIPELINES
Title (en)
METHOD FOR ELECTROCHEMICAL HYDROGEN SEPARATION FROM NATURAL-GAS PIPELINES
Title (de)
VERFAHREN ZUR ELEKTROCHEMISCHEN WASSERSTOFFABTRENNUNG AUS ERDGAS-PIPELINES
Title (fr)
PROCÉDÉ DE SÉPARATION ÉLECTROCHIMIQUE D'HYDROGÈNE À PARTIR DE CONDUITES DE GAZ NATUREL
Publication
Application
Priority
- EP 20166598 A 20200330
- EP 2021058010 W 20210326
Abstract (en)
[origin: WO2021198102A1] The present invention relates to a one-stage membrane method for the electrochemical separation of hydrogen from natural-gas flows in a pipeline (1) that has a positive pressure in the range of 50 mbar to 100 bar, the method having the following method steps: (i) a partial gas flow (2) is drawn from the natural-gas flow in a pipeline (1) without altering the gas composition, the mass flow of the partial gas flow being set depending on the hydrogen content in the natural-gas flow (1) such that, with a hydrogen concentration of <10 vol. %, a degree of depletion of 0.65 to 0.975 is achieved, and, with a hydrogen concentration of >10 vol. %, a degree of depletion of 0.55 to 0.925 is achieved, the degree of depletion being defined as the quotient of the desired molar H2 product flow (6) and of the molar H2 reactant volume flow of the partial gas flow at the inlet of the membrane unit (2); (ii) this partial gas flow (2) is compressed (3) upstream of a membrane unit (5); (iii) this partial gas flow is heated to 100 to 250°C, either upstream of the membrane unit or in the membrane unit, and water (4) is supplied to this partial gas flow upstream of the membrane unit and/or on the permeate side of the membrane unit (4a) so that the water load is between 0.005 to 0.2 mol water/mol natural gas; (iv) this partial gas flow is supplied to an electrochemical membrane unit in which hydrogen is separated as permeate (6a) at a temperature of 100 to 250°C; (v) the retentate (8) of the membrane unit is supplied back into the natural-gas flow, is supplied for use in a chemical process, and/or is used as fuel. The present invention also relates to a method for determining the optimised partial gas flow that is drawn from a pipeline conveying natural gas and hydrogen, in order to separate hydrogen from this partial gas flow in an electrochemical membrane unit.
IPC 8 full level
B01D 53/22 (2006.01); B01D 53/32 (2006.01); C01B 3/50 (2006.01)
CPC (source: EP US)
B01D 53/228 (2013.01 - EP US); B01D 53/326 (2013.01 - EP US); C01B 3/501 (2013.01 - EP); B01D 2256/16 (2013.01 - EP US); B01D 2257/7025 (2013.01 - EP US); Y02C 20/20 (2013.01 - EP); Y02P 20/156 (2015.11 - EP)
Citation (search report)
See references of WO 2021198102A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2021198102 A1 20211007; AU 2021248598 A1 20221020; CA 3178459 A1 20211007; EP 4126307 A1 20230208; JP 2023521627 A 20230525; US 2023111285 A1 20230413
DOCDB simple family (application)
EP 2021058010 W 20210326; AU 2021248598 A 20210326; CA 3178459 A 20210326; EP 21714199 A 20210326; JP 2022559933 A 20210326; US 202117914371 A 20210326