Title: Energy storage using an REP with an engine

Abstract

An energy storage system includes a power plant configured to generate an exhaust gas comprising carbon dioxide. The energy storage system further includes a first fuel cell configured to operate in reverse as an electrolyzer. The first fuel cell is configured to receive at least a portion of the exhaust gas from the power plant. An anode is configured to receive carbon dioxide via the exhaust gas and methane from a separate feed, and the anode is configured to output a hydrogen-containing gas mixture. The energy storage system further includes a reformer configured to methanate the hydrogen-containing gas mixture to convert substantially all of the carbon monoxide in the hydrogen-containing gas mixture to methane. The energy storage system further includes a second fuel cell operating in reverse as a hydrogen pump, the second fuel cell configured to separate hydrogen from a gas mixture output by the reformer.

Inventors:

Jahnke, Fred C.; Lambrech, Matthew

Issue Date:

2020-06-09

Research Org.:

FuelCell Energy, Danbury, CT (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1651008

Patent Number(s):

10680265

Application Number:

15/980,305

Assignee:

FuelCell Energy, Inc. (Danbury, CT)

Patent Classifications (CPCs):

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

C - CHEMISTRY C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES C25B - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS

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C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

C01B2203/0233 - the reforming step being a steam reforming step
C01B2203/067 - the reforming process taking place in the fuel cell
C01B3/38 - using catalysts

C - CHEMISTRY C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES C25B - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS

C25B1/00 - Electrolytic production of inorganic compounds or non-metals
C25B1/02 - of hydrogen or oxygen
C25B15/08 - Supplying or removing reactants or electrolytes

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

H01M16/003 - {of fuel cells with other electrochemical devices, e.g. capacitors, electrolysers}
H01M2250/407 - Combination of fuel cells with mechanical energy generators
H01M8/0612 - from carbon-containing material
H01M8/184 - {Regeneration by electrochemical means}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E60/36 - Hydrogen production from non-carbon containing sources
Y02E60/50 - Fuel cells

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DOE Contract Number:  

EE0006669

Resource Type:

Patent

Resource Relation:

Patent File Date: 05/15/2018

Country of Publication:

United States

Language:

English

Subject:

25 ENERGY STORAGE; 30 DIRECT ENERGY CONVERSION