Systems and methods for collecting and processing permafrost gases, and for cooling permafrost

Patent metadata

Field	Value
Publication number	US-9039327-B2
Application number	US-201213584741-A
Country	US
Kind code	B2
Filing date	Aug 13, 2012
Priority date	Aug 12, 2011
Publication date	May 26, 2015
Grant date	May 26, 2015

Abstract

Systems and methods for collecting and processing permafrost gases and for cooling permafrost are disclosed herein. A method for processing gas in a permafrost region includes obtaining a gas from a sacrificial area of a thawing permafrost region, dissociating the gas in a non-combustive chemical process, and circulating a constituent of the gas through a savable area of the thawing permafrost region to cool the savable area. This process can be used to cool selected areas of permafrost and/or create clean-burning fuels and/or other products from permafrost gases.

First claim

I claim:

1. A system for cooling permafrost, comprising:
a first conduit coupled to a source of sub-surface donor gas at a first permafrost region;
a chemical reactor coupled to the first conduit to receive the donor gas and conduct a non-combustion reaction that dissociates the donor gas into first and second constituents;
a second conduit coupled to the reactor to receive the dissociated first constituent;
a first heat exchanger coupled to the second conduit to receive the dissociated first constituent, at least a portion of the first heat exchanger being exposed to ambient air to cool the first constituent; and
a sub-surface second heat exchanger coupled to the second conduit to receive the cooled first constituent from the first heat exchanger, the second heat exchanger being positioned to transfer heat from a second permafrost region to the cooled first constituent.

2. The system of claim 1 , further comprising:
a pump coupled to the second conduit to circulate the first constituent.

3. The system of claim 1 , wherein the second heat exchanger extends into the second permafrost region via vertical holes bored into permafrost at the second permafrost region.

4. The system of claim 1 , wherein the first heat exchanger is at least one of a solar concentrator and a radiator.

5. The system of claim 1 , further comprising:
a temperature sensor disposed to measure a temperature of the cooled first constituent within the second heat exchanger.

6. The system of claim 5 , wherein the temperature sensor is disposed to measure at least one temperature along a length of the second heat exchanger.

7. The system of claim 1 , further comprising:
a valve coupled to the second heat exchanger and disposed to direct at least a portion of the first constituent to an engine.

8. The system of claim 7 , further comprising:
a generator coupled to the engine to provide power to at least a portion of the system.

9. The system of claim 1 , wherein the donor is a hydrogen-bearing donor, and wherein the first constituent includes hydrogen.

10. The system of claim 9 , wherein the donor is a hydrocarbon, the first constituent includes hydrogen, and the second constituent includes carbon.

11. A system for collecting and processing a gas released from permafrost, comprising:
a plurality of conduits disposed at a permafrost area, with individual conduits having a lower portion disposed at a depth within the permafrost area and an upper portion disposed above a surface of the permafrost area, and with the individual conduits having a wall that is permeable to the gas released from the permafrost;
a barrier disposed over the permafrost area, the barrier having a peripheral region and a gas exit port;
a seal disposed at the peripheral region of the barrier to at least restrict the gas from exiting the barrier; and
a chemical reactor operatively coupled to the gas exit port to receive the gas, the chemical reactor having a reaction zone positioned to conduct a non-combustion reaction that dissociates a hydrogen-bearing constituent from the gas.

12. The system of claim 11 , further comprising:
a compressor coupled to the gas exit port to direct compressed gas to the chemical reactor.

13. The system of claim 11 , wherein the barrier includes a film.

14. The system of claim 11 , wherein the barrier comprises multiple films joined together to form a continuous sheet.

15. The system of claim 11 , wherein the barrier has an external surface that is at least partially reflective.

16. The system of claim 11 , wherein the barrier is transmissive to sunlight.

17. The system of claim 11 , wherein a portion of the barrier is disposed at a higher elevation than the peripheral region of the barrier.

18. The system of claim 11 , wherein the gas has a first composition and a different second composition, and wherein the chemical reactor is a first chemical reactor having a reaction zone positioned to conduct a non-combustion reaction that dissociates the hydrogen-bearing constituent from the first composition of the gas, the system further comprising:
a second chemical reactor operatively coupled to the gas exit port to receive the gas, the second chemical reactor having a reaction zone positioned to conduct a non-combustion reaction that dissociates a hydrogen-bearing constituent from the second composition of the gas;
a valve disposed between the gas exit port and the first and second chemical reactors to direct a flow of the gas to at least one of the first and second chemical reactors; and
a sensor disposed to detect a presence of at least one of the first and second compositions of the gas.

19. The system of claim 18 , further comprising:
a controller operatively connected to the sensor and operatively connected to the valve to direct the flow of the gas.

20. The system of claim 18 , wherein the first chemical reactor has a first reaction zone to process methane to produce carbon and hydrogen and the second chemical reactor has a second reaction zone to process methane and carbon dioxide to produce carbon, hydrogen, and methanol.

21. The system of claim 11 , further comprising:
a synthesizer coupled to the chemical reactor that combines the hydrogen-bearing constituent with nitrogen.

22. A system for cooling permafrost, comprising:
a first barrier disposed over a sacrificial area of the permafrost and having a gas exit port;
a plurality of subterranean conduits positioned at the sacrificial area under the first barrier to receive gases released from the permafrost and conduct the gases to the gas exit port, the gases including at least a methane gas;
at least one chemical reactor in fluid communication with the gas exit port to receive the gases from the plurality of conduits, the at least one chemical reactor having a reaction zone positioned to conduct a non-combustion reaction that dissociates hydrogen gas from the methane gas;
a second barrier disposed over a savable area of the permafrost;
a subterranean heat exchanger at the savable area under the second barrier, the heat exchanger being positioned to receive the dissociated hydrogen gas to cool the savable area by directing the dissociated hydrogen gas through the savable area;
a radiator in fluid communication with the heat exchanger, the second barrier disposed between the radiator and the savable area; and
a pump in fluid communication with the heat exchanger to circulate the dissociated hydrogen gas through the radiator.

23. The system of claim 22 , wherein the at least one chemical reactor comprises a first chemical reactor and a second chemical reactor, the first chemical reactor having a reaction zone positioned to receive the methane gas and the second chemical reactor having a reaction zone positioned to receive a mixture of the methane gas and a carbon dioxide gas.

24. The system of claim 23 , further comprising:
a valve disposed between the sacrificial area and the first and second chemical reactors;
a sensor disposed between the sacrificial area and the valve; and
a controller operatively connected to the valve and sensor to receive data from the sensor regarding a composition of the gases and to control a status of the valve.

Assignees

• Mcalister Roy E
• Mcalister Technologies Llc

Inventors

• Mcalister Roy Edward

Classifications

• B01J19/244

  Concentric tubes · CPC title

• E02D3/11 Primary

  by thermal, electrical or electro-chemical means (freezing soil for interrupting passage of underground water E02D19/14) · CPC title

• B01J2219/00081

  Tubes · CPC title

• B01J2219/00117

  with two or more reactions in heat exchange with each other, such as an endothermic reaction in heat exchange with an exothermic reaction · CPC title

• F24S20/20

  Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants · CPC title