# US 11,897,828 B1 · Thermochemical reactions using geothermal energy

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- Number: US 11,897,828 B1
- Document ID: US11897828B1
- Status: Granted
- Kind: B1
- Application number: 18/117,313
- Filed: 2023-03-03
- Granted: 2024-02-13
- Earliest claimed: 2023-03-03
- Assignees: EnhancedGEO Holdings, LLC
- Applicants: EnhancedGEO Holdings, LLC
- Inventors: Greg Lindberg; Kimberly C. Conner
- Web page: https://patentgrep.com/patent/US11897828B1

## CPC

- C07C 1/12: from carbon dioxide with hydrogen
- C10G 2/32: {with the use of catalysts}
- B01J 12/005: {carried out at high temperatures, e.g. by pyrolysis}
- B01J 12/007: {in the presence of catalytically active bodies, e.g. porous plates}
- B01J 19/2465: {externally, i.e. the mixture leaving the vessel and subsequently re-entering it}
- B01J 21/04: Alumina
- B01J 23/00: Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 (B01J21/16 takes precedence)
- B01J 23/72: Copper
- B01J 23/892: {Nickel and noble metals}
- C01B 3/042: Decomposition of water (by electrolysis of water C25B1/04)
- C01B 3/045: {in gaseous phase}
- E21B 41/00: Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B 43/24: using heat, e.g. steam injection
- F24T 10/10: with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T 10/13: using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
- F24T 10/30: using underground reservoirs for accumulating working fluids or intermediate fluids
- B01J 2219/00103: in a heat exchanger separate from the reactor
- C07C 2521/04: Alumina
- C07C 2523/89: combined with noble metals
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- F24T: GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS

## Abstract

A reaction system includes a wellbore extending from a surface into a subterranean heat source. The reaction system further includes a reaction chamber configured to be maintained at a reaction temperature using heat from the subterranean heat source. The reaction system further includes one or more inlet conduits. The inlet conduits are configured to provide one or more feed streams to the reaction chamber. The reaction system also includes outlet conduits configured to allow flow of one or more product streams.

## Claims

### Claim 1

A reaction system for producing hydrocarbons, the reaction system comprising:
a wellbore extending from a surface into a subterranean heat source, wherein the subterranean heat source is a magma reservoir;
a reaction chamber configured to be maintained at a reaction temperature using heat obtained from the subterranean heat source, wherein the reaction chamber extends at least partially into the magma reservoir;
one or more inlet conduits configured to provide one or more feed streams to the reaction chamber, wherein at least one of the one or more feed streams comprises one or more oxides of carbon, hydrogen, or water; and
outlet conduits configured to allow flow of a first product stream comprising one or more liquid hydrocarbon end products and a second product stream comprising one or more gas hydrocarbon end products.

### Claim 2 (depends on 1)

The reaction system of claim 1, further comprising one or more high pressure boilers.

### Claim 3 (depends on 1)

The reaction system of claim 1, further comprising one or more heat exchangers.

### Claim 4 (depends on 1)

The reaction system of claim 1, further comprising a return conduit to recycle unreacted water back to the reaction chamber.

### Claim 5 (depends on 1)

The reaction system of claim 1, further comprising one or more valves in one or more the inlet conduits to control the flow of the one or more of the feed streams.

### Claim 6 (depends on 1)

The reaction system of claim 1, further comprising one or more non-volatile metal oxide catalysts disposed in the reaction chamber, wherein the one or more non-volatile metal oxide catalysts are configured to convert at least a portion of the water from the at least one of the one or more feed streams into hydrogen and oxygen in response to maintaining the water within the reaction chamber for a residence time.

### Claim 7 (depends on 1)

The reaction system of claim 1, wherein the reaction chamber is located within the wellbore.