Back to results
US 2016/0355933 A1Published application
Method and system for producing carbon dioxide and electricity from a gaseous hydrocarbon feed
AssigneeHtceramix S.A.
InventorsStefan DIETHELM, Alberto RAVAGNI, Olivier BUCHELI
Life of this patent
Estimating the term…
Abstract
A method and system for producing carbon dioxide and electricity from a gaseous hydrocarbon feed using a solid oxide fuel cell, a water-gas shift reactor and a reformer.
Claims14
A method for producing concentrated carbon dioxide and electricity from a gaseous hydrocarbon feed using a solid oxide fuel cell SOFC, the method comprising the steps of:
- introducing a hydrogen enriched gaseous hydrocarbon feed into a reformer, introducing steam;
- in the reformer, generating a reformed process gas by at least partially converting methane and steam into carbon monoxide and hydrogen;
- introducing the reformed process gas into an anode side of the solid oxide fuel cell;
- in the solid oxide fuel cell, introducing air into a cathode side of the solid oxide fuel cell and converting hydrogen and carbon monoxide of the reformed process gas in combination with oxygen into an anode off-gas comprising steam, carbon dioxide and unconverted process gas;
- wherein
- introducing the gaseous hydrocarbon feed into a permeate side of a water gas shift membrane reactor, wherein the gaseous hydrocarbon feed is used as a sweep gas in the permeate side of the water gas shift membrane reactor, and wherein the sweep gas is hydrogen enriched in the permeate side of the water gas shift membrane reactor and leaves the water gas shift membrane reactor as the hydrogen enriched gaseous hydrocarbon feed,
- introducing the anode off-gas into a feed side of the water gas shift membrane reactor;
- and
- in the feed side of the water-gas shift membrane reactor converting carbon monoxide and steam of the anode off gas into concentrated carbon dioxide and hydrogen and depleting the anode off-gas of hydrogen to create a carbon dioxide rich gas stream, and enriching the sweep gas with hydrogen.
6 more elements
A system for producing concentrated carbon dioxide and electricity from a gaseous hydrocarbon feed using a solid oxide fuel cell SOFC, the system comprising:
- a water-gas shift reactor,
- a reformer,
- the solid oxide fuel cell SOFC comprising an anode side and a cathode side,
- an inlet for the gaseous hydrocarbon feed,
- wherein the reformer is fluidly connected with a hydrogen enriched gaseous hydrocarbon feed and a steam feed, and wherein the reformer generates a reformed process gas by at least partially converting methane and steam into carbon monoxide and hydrogen;
- wherein the anode side of the solid oxide fuel cell is fluidly connected with the reformer for receiving the reformed process gas and for converting the reformed process gas in combination with oxygen into an anode off-gas comprising steam, carbon dioxide and unconverted reformed process gas;
- wherein
- the water gas shift reactor is a water gas shift membrane reactor,
- that there is an outlet for a carbon dioxide rich gas stream,
- that the water gas shift membrane reactor comprises a permeate side, a feed side, a catalyst and a hydrogen selective membrane between the permeate side and the feed side,
- that the permeate side having an input side and an exit side and the feed side having an input side and an exit side,
- that the inlet is fluidly connected with the input side of the permeate side,
- that the exit side of the permeate side providing the hydrogen enriched gaseous hydrocarbon feed and being fluidly connected with the reformer,
- that the input side of the feed side of the water gas shift membrane reactor is fluidly connected with the solid oxide fuel cell for receiving the anode off-gas, and for converting carbon monoxide and steam into concentrated carbon dioxide and hydrogen in the feed side, and for separating the hydrogen through the membrane to create a hydrogen enriched gaseous feed on the permeate side, so that the anode off-gas is depleted of hydrogen and carbon monoxide to create the carbon dioxide rich gas stream comprising mainly carbon dioxide and steam on the feed side,
- and that the exit side of the feed side is fluidly connected with the outlet.
12 more elements
Dependencies are inferred from the claim text.