# US 2017/0288247 A1 · Systems for storing, distributing and dispatching energy on demand using and recycling carbon

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- Number: US 2017/0288247 A1
- Document ID: US20170288247A1
- Status: Published application
- Kind: A1
- Application number: 15/627,724
- Filed: 2017-06-20
- Published: 2017-10-05
- Earliest claimed: 2013-03-15
- Assignees: Ziet, LLC
- Applicants: Ziet, LLC
- Inventors: Douglas A. ZIETLOW
- Web page: https://patentgrep.com/patent/US20170288247A1

## CPC

- H01M 8/0656: by electrochemical means (H01M8/065 takes precedence)
- C01B 32/05: Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
- C01B 32/40: Carbon monoxide
- C01B 32/50: Carbon dioxide
- H01M 8/18: Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M 2008/1293: {Fuel cells with solid oxide electrolytes}
- H01M 2008/147: {Fuel cells with molten carbonates}
- H01M 2250/00: Fuel cells for particular applications; Specific features of fuel cell system
- Y02E 20/18: Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
- Y02E 60/50: Fuel cells
- Y02P 20/133: Renewable energy sources, e.g. sunlight
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present invention generally relates to storing energy in a form that is carbon neutral, storable and transportable, so that it can be used on demand. The present invention provides a process and system for using energy as available to produce carbon from carbon oxide, and then oxidizing the carbon to generate useful energy on demand, while effectively recycling the carbon, oxidant, and carbon oxide used in the process or system. In one embodiment, the present invention effectively stores renewable energy as carbon, transports the carbon, oxidizes the carbon to generate useful energy on demand and recycles the carbon as carbon dioxide. This invention may increase the utilization of renewable energy, especially for electrical power generation, while producing no net carbon dioxide or other air pollutants.

## Claims

### Claim 1

A system that transforms energy as available to energy on demand, said system comprising:
(a) a first sub-system to use said energy as available to reduce carbon oxide to overall reaction products consisting essentially of carbon and diatomic molecular oxygen;
(b) a carbon storage unit for intermediate storage of said carbon;
(c) a second sub-system to separately oxidize at least some of said carbon to generate said energy on demand and consequent carbon oxide; and
(d) a third sub-system to recycle and/or reuse said consequent carbon oxide, from said second sub-system back to said first sub-system.

### Claim 2 (depends on 1)

The system of claim 1, said first sub-system comprising a reduction reactor operated at effective reduction conditions to reduce said carbon oxide to said overall reaction products consisting essentially of carbon and diatomic molecular oxygen.

### Claim 3 (depends on 2)

The system of claim 2, wherein said reduction reactor is selected from the group consisting of a thermal reactor, a catalytic reactor, an electrolysis reactor, a reverse fuel cell, an electrochemical reactor, an electromagnetic reactor, a photocatalytic reactor, a pulsed laser reactor, and a plasma reactor.

### Claim 4 (depends on 2)

The system of claim 2, said system further comprising a separation unit that is optionally integrated with said reduction reactor, wherein said separation unit is configured to separate said carbon from said diatomic molecular oxygen.

### Claim 5 (depends on 1)

The system of claim 1, said second sub-system comprising an oxidation reactor operated at effective oxidation conditions to oxidize said carbon to generate said energy on demand and said consequent carbon oxide.

### Claim 6 (depends on 5)

The system of claim 5, wherein said oxidation reactor is selected from the group consisting of a boiler, a conventional coal-fired power plant, a modified coal-fired power plant, a non-catalytic combustion unit, a catalytic oxidation reactor, a chemical-looping combustion system, a fuel cell, and an integrated gasification combined cycle unit.

### Claim 7 (depends on 6)

The system of claim 6, wherein said oxidation reactor is a molten carbonate fuel cell or solid oxide fuel cell.

### Claim 8 (depends on 5)

The system of claim 5, said system further comprising a transporting means to transport at least a portion of said carbon to said oxidation reactor.

### Claim 9 (depends on 8)

The system of claim 8, wherein said transporting means is selected from the group consisting of truck, train, ship, barge, pipeline, bulk solids conveyer, and combinations thereof.

### Claim 10 (depends on 8)

The system of claim 8, wherein said transporting means includes a slurry of said carbon in liquid oxygen.

### Claim 11 (depends on 1)

The system of claim 1, said system comprising a common reactor capable of (i) at a first set of operating conditions, reducing said carbon oxide to said overall reaction products consisting essentially of carbon and diatomic molecular oxygen, and (ii) at a second set of operating conditions, oxidizing said carbon to generate said energy on demand and said consequent carbon oxide.

### Claim 12 (depends on 1)

The system of claim 1, wherein said carbon storage unit is selected from the group consisting of piles, rail cars, truck trailers, tanks, silos, bins, hoppers, intermediate bulk containers, sacks, drums, and combinations thereof.

### Claim 13 (depends on 1)

The system of claim 1, said system further comprising an oxidant storage unit for intermediate storage of said oxidant.

### Claim 14 (depends on 13)

The system of claim 13, wherein said oxidant storage unit is selected from the group consisting of piles, rail cars, truck trailers, tanks, silos, bins, hoppers, intermediate bulk containers, sacks, drums, the atmosphere, and combinations thereof.

### Claim 15 (depends on 1)

The system of claim 1, said system further comprising a carbon oxide storage unit for intermediate storage of said carbon oxide.

### Claim 16 (depends on 15)

The system of claim 15, wherein said carbon oxide storage unit is selected from the group consisting of rail cars, truck trailers, tanks, silos, bins, hoppers, intermediate bulk containers, sacks, drums, the atmosphere, and combinations thereof.

### Claim 17 (depends on 1)

The system of claim 1, wherein said third sub-system is configured to (i) reduce at least some of said consequent carbon oxide to generate recycled carbon and additional diatomic molecular oxygen, with no other products of overall reaction, and (ii) oxidize at least some of said recycled carbon to generate additional energy on demand.

### Claim 18 (depends on 1)

The system of claim 1, wherein said first sub-system is co-located with said second sub-system at a single plant site.

### Claim 19 (depends on 1)

The system of claim 1, wherein said first sub-system and said second sub-system are located at separate plant sites.

### Claim 20 (depends on 1)

The system of claim 1, wherein said third sub-system is configured to virtually recycle and/or reuse said consequent carbon oxide, and wherein said system includes means to capture atmospheric carbon dioxide and introduce said atmospheric carbon dioxide to said first sub-system.