Carbon dioxide as fuel for power generation and sequestration system

• US 7,950,243 B2
• Filed: 10/30/2007
• Issued: 05/31/2011
• Est. Priority Date: 01/16/2006
• Status: Expired due to Fees

• Current Assignee: Michael H. Gurin
• Original Assignee: Michael H. Gurin
• Inventors: Gurin, Michael H.
• Primary Examiner(s): Jones; Melvin
• Application Number:
  US11/927,675
• Publication Number:
  US 20090139234A1
• Time in Patent Office: 1,309 Days
• Field of Search: 621/01, 622/351, 623/232, 623/233, 623/242, 622/387, 624/76, 606/45
• US Class Current: 62/238.3
• CPC Class Codes: C09K 5/047 for absorption-type refrigeration systems
• CPC Class Codes: F01K 13/00 General layout or general methods of operation of complete plants
• CPC Class Codes: F01K 25/06 using mixtures of different fluids plants using mixtures of steam and gas F01K21/04
• CPC Class Codes: Y02E 20/32 Direct CO2 mitigation

Abstract

An integrated energy production system and carbon dioxide reaction system for enhancing the energy efficiency and minimizing greenhouse gas emissions of thermally activated power production methods. The system utilizes heat of reaction from the carbon dioxide reaction system to directly reduce the fuel requirements of the thermally activated power production method. The system, when utilizing a reverse fuel cell, achieves concurrent carbon dioxide sequestration resulting from the fuel combustion.

Claims

1. An energy production system operable to reduce fuel requirement of a thermodynamic power generating cycle comprising:

a) a thermodynamic power generating cycle having a working fluid and producing waste heat, wherein the thermodynamic power generating cycle consumes fuel to generate generated energy; and

b) a carbon dioxide reaction having carbon dioxide and a carbon dioxide co-reactant, wherein the carbon dioxide reaction is an exothermic reaction producing a thermal source within the thermodynamic power generating cycle.

2. The energy production system according to claim 1 wherein the carbon dioxide reaction concurrently increases energy efficiency of the thermodynamic power generating cycle and sequesters carbon dioxide, and wherein the carbon dioxide generated from the thermodynamic power generating cycle with the carbon dioxide reaction is at least 5% less carbon dioxide per unit of generated energy as compared to the thermodynamic power generating cycle without the carbon dioxide reaction.

3. The energy production system according to claim 1 wherein the carbon dioxide reaction is an exothermic reaction.

4. The energy production system according to claim 3 wherein the carbon dioxide reaction consists of reactions creating carbonates and polycarbonates.

5. The energy production system according to claim 1 is further comprised of an endothermic reaction, wherein the thermodynamic power generating cycle creates bottom cycle waste heat, and wherein the waste heat is utilized in the endothermic reaction including endothermic reactions in a biomass to biofuel synthesis or salts having a negative heat of solution.

6. The energy production system according to claim 1 wherein the carbon dioxide reaction consists of carbon dioxide and a co-reactant, wherein the co-reactant is solubilized prior to the carbon dioxide reaction.

7. The energy production system according to claim 1 wherein the carbon dioxide is an absorbate within an absorbent during the carbon dioxide reaction.

8. The energy production system according to claim 1 wherein the absorbate solubilizes the co-reactant of the carbon dioxide reaction.

9. The energy production system according to claim 1 wherein the absorbent is operable to increase surface area and reaction rate and wherein the absorbent is selected from the group consisting of ionic liquids, poly(ionic liquids).

10. The energy production system according to claim 1 wherein the carbon dioxide is a supercritical fluid.

11. The energy production system according to claim 1 operable to reduce parasitic losses from the generated energy wherein the generated energy is from a first thermodynamic power generating cycle further comprising an absorption heat pump, wherein the carbon dioxide reaction increases the enthalpy within the first thermodynamic power generating cycle, wherein waste heat from the first thermodynamic power generating cycle is at least in part a thermal source for the absorption heat pump, and wherein the absorption heat pump produces cooling to condense carbon dioxide.

12. The energy production system according to claim 1 wherein the thermodynamic power generating cycle is comprised of at least one thermal reaction selected from the group consisting of either a carbon dioxide reaction prior to a first thermal reaction wherein the carbon dioxide reaction has a starting temperature of less than 400 Fahrenheit or a first thermal reaction prior to the carbon dioxide reaction, wherein the first thermal reaction is at a starting temperature, and wherein the starting temperature is at a temperature selected from:

a) less than 400 Fahrenheit;

b) less than 250 Fahrenheit;

c) less than 100 Fahrenheit;

or d) less than ambient temperature.

13. The energy production system according to claim 1 operable to increase the enthalpy of the thermodynamic power generating cycle further comprising a condensing device having a working fluid with a discharge temperature, wherein the carbon dioxide reaction has a starting temperature of approximately the discharge temperature, and wherein the carbon dioxide reaction is in fluid communication with the working fluid.

14. The energy production system according to claim 1 wherein the thermodynamic power generating cycle working fluid consists of a stoichiometric excess of carbon dioxide and wherein the stoichiometric excess is at least 5% greater than an amount of carbon dioxide consumed as a reactant within the carbon dioxide reaction.

15. The energy production system according to claim 14 wherein the thermodynamic power generating cycle has a high-pressure greater than the supercritical pressure of carbon dioxide.

16. The energy production system according to claim 1 further comprising expansion device, wherein the expansion device is operable to handle at least 5% on a volume basis solid or liquid reaction products resulting from the carbon dioxide reaction.

17. The energy production system according to claim 1 further comprising a filtration device upstream of an expansion device, wherein the reaction products have a molecular weight greater than 200 grams per mole or agglomerates less than 2 microns in diameter, wherein the filtration device is operable to remove reaction products from the carbon dioxide reaction, and wherein the expansion device produces generated energy.

18. The energy production system according to claim 1 further comprising at least one process intensification mixer including hydrodynamic cavitation devices, spinning disk, or spinning tube in tube, wherein the intensification mixer increases the carbon dioxide reaction producing carbon dioxide reaction products.

19. The energy production system according to claim 1 further comprising at least one microchannel device, wherein the microchannel device has channels less than 10 microns and wherein the microchannel device is upstream of carbon dioxide and the carbon dioxide co-reactant mixing.

20. The energy production system according to claim 18 wherein the carbon dioxide reaction products have a particle size diameter of less than 1 micron.

21. The energy production system according to claim 17 wherein the thermodynamic power generating cycle working fluid consists of a stoichiometric excess of carbon dioxide, wherein the stoichiometric excess is at least 5% greater than the amount of carbon dioxide consumed as a reactant within the carbon dioxide reaction, wherein the working fluid is mixed with water downstream of the filtration device, and wherein the working fluid downstream of the filtration device is chemically reduced within a reverse fuel cell.

22. The energy production system according to claim 1 operable to produce carbon dioxide for the carbon dioxide reaction further comprising:

a) a compressed air source, wherein the compressed air is a source of carbon dioxide for the carbon dioxide reaction;

b) a condenser, wherein the condenser condenses the carbon dioxide from the compressed air; and

c) a carbon dioxide isolation method including nanofiltration, liquid absorption, and solid absorption, wherein the carbon dioxide isolation method isolates the carbon dioxide for the carbon dioxide reaction.

23. The energy production system according to claim 22 operable to enhance combustion of the fuel further comprising a method to isolate oxygen, wherein the oxygen is from the compressed air.

24. The energy production system according to claim 1 further comprising methods to increase surface area, wherein the carbon dioxide and co-reactant are further processed by process methods including hydrodynamic cavitation.

25. The energy production system according to claim 1 wherein the carbon dioxide reaction consumes the carbon dioxide and the carbon dioxide co-reactant further comprising a second set of co-reactants for a second chemical reaction, wherein the second chemical reaction is an endothermic reaction that consumes the waste heat of the thermodynamic power generating cycle.

26. The energy production system according to claim 25 operable to consume the waste heat from the exothermic carbon dioxide reaction further comprising a reversible electrochemical reaction, wherein waste heat is utilized in the reversible electrochemical reaction, wherein the second set of co-reactants are consumed in the reversible electrochemical reaction and wherein the co-reactants include an electrolyte operable to produce electrical energy and stored in an electrical energy storage device.

27. The energy production system according to claim 25 further comprising a second endothermic reaction, wherein the endothermic reaction is in-situ with the reversible electrochemical reaction.

28. The energy production system according to claim 26 wherein the electrolyte is vanadium sulfate.

29. An energy production system operable as an electrochemical reduction reaction comprising a carbon dioxide reaction having a working fluid, carbon dioxide, and carbon dioxide co-reactant, wherein the working fluid is comprised of a stoichiometric equivalent of water and stoichiometric excess of carbon dioxide and wherein the stoichiometric excess is at least 5% greater than the amount of carbon dioxide consumed as a reactant within the carbon dioxide reaction and wherein the carbon dioxide reaction is the electrochemical reduction reaction.

30. The energy production system according to claim 29 operable to increase the enthalpy of the stoichiometric excess of carbon dioxide wherein the electrochemical reduction reaction has a quantum efficiency conversion rate of less than 100%, wherein the electrochemical reduction reaction results in the creation of thermal energy, and wherein the thermal energy increases the enthalpy of the stoichiometric excess of carbon dioxide.

31. The energy production system according to claim 29 operable to increase generated power and reduce fuel consumption further comprising a thermodynamic power generating cycle, wherein the carbon dioxide reaction results in the creation of thermal energy utilized within the thermodynamic power generating cycle to produce additional generated energy.

32. The energy production system according to claim 29 wherein the working fluid is further comprising at least one of an electrolyte and electron transfer additive.

33. The energy production system according to claim 32 further comprising of a reversible chemical reaction, wherein the electrolyte is a co-reactant in the carbon dioxide reaction and wherein the electrolyte is utilized within the endothermic direction of the reversible chemical reaction.

34. An energy production system operable to reduce external thermal energy comprising:

a) a carbon dioxide absorption process having carbon dioxide and a carbon dioxide absorbent, wherein the carbon dioxide absorption process produces heat of absorption; and

b) an endothermic chemical reaction having co-reactants, wherein the heat of absorption is at least a partial source of thermal energy to the endothermic chemical reaction.

35. The energy production system according to claim 34 further comprised of at least one additive of an electrolyte and electron transfer additive, wherein the at least one additive is combined with the co-reactants.

36. An energy production system operable to increase reaction rate comprising:

a) a carbon dioxide, wherein the carbon dioxide is a supercritical fluid having a pressure greater than the supercritical pressure;

b) at least one mineral, wherein the mineral chemically reacts with the carbon dioxide; and

c) a thermal energy source, wherein the thermal source expands the volume of carbon dioxide and the volume increases the mineral surface area as a means of accelerating the reaction rate between the mineral and the carbon dioxide.

37. The energy production system according to claim 36 operable to increase the reaction rate further comprised of a method to achieve hydrodynamic cavitation, wherein the reaction rate is further accelerated by the hydrodynamic cavitation.

38. An energy production system operable to produce electricity and waste heat comprising:

a) a first carbon dioxide reaction, wherein the first carbon dioxide reaction consists of carbon dioxide and carbon dioxide co-reactants;

b) a thermodynamic power generating cycle having a working fluid of a stoichiometric excess of carbon dioxide, wherein the stoichiometric excess is at least 5% greater than the amount of carbon dioxide consumed in the first carbon dioxide reaction and wherein the thermodynamic power generating cycle produces electricity and waste heat; and

c) a second carbon dioxide reaction, wherein the electricity generated from the thermodynamic power generating cycle is utilized to reduce the stoichiometric excess of carbon dioxide into reduced carbon dioxide in the second carbon dioxide reaction.

39. The energy production system according to claim 38 wherein the waste heat is utilized to accelerate the second carbon dioxide reaction.

40. The energy production system according to claim 38 operable to produce syngas further comprised of hydrogen, wherein the reduced carbon dioxide is further combined with the hydrogen to create syngas.

41. The energy production system according to claim 38 wherein the stoichiometric excess is at least 5% greater than the sum of carbon dioxide consumed as a reactant in the first carbon dioxide reaction and the second carbon dioxide reaction.

42. An energy production system operable to increase energy efficiency comprising a fuel mixture and a fuel reaction, wherein the fuel mixture contains carbon dioxide at levels greater than 1,000 parts per million and fuel, and wherein the fuel reaction is either an electrochemical or a combustion reaction.

43. The energy production system according to claim 42 wherein the fuel mixture is at a pressure greater than the supercritical pressure of carbon dioxide.

44. The energy production system according to claim 42 wherein the total moles of carbon dioxide is in excess of carbon dioxide consumed in the fuel mixture exothermic reaction.

45. The energy production system according to claim 42 wherein the carbon dioxide is operable to increase transport of the fuel in the fuel reaction and to increase the fuel reaction rate.

46. The energy production system according to claim 42 wherein the fuel reaction produces waste heat and fuel reaction products, and wherein the carbon dioxide is operable to increase the fuel reaction fuel efficiency by directly utilizing waste heat from the fuel reaction to increase discharge pressure of the fuel reaction products.

47. The energy production system according to claim 46 further comprising an expansion device, wherein the fuel reaction products are expanded from supercritical to subcritical pressure within the expansion device, wherein the expansion device includes a turbine, and positive displacement pump, wherein the expansion device increases the energy produced by the energy production system, and wherein the expansion device provides integral thermal management of the energy production system.

48. The energy production system according to claim 42, wherein the energy production system includes a fuel cell, a porous burner, a pyrolyzer, or a gasifier.

49. The energy production system according to claim 42 wherein the fuel is at least one of carbon, biomass, cellulose, sugar, starch, glycerine, and combinations thereof.

50. The energy production system according to claim 42 wherein the carbon dioxide is further utilized to remove reaction byproducts of the fuel reaction.

51. The energy production system according to claim 42 operable to sequester carbon dioxide further comprising an exothermic reaction, wherein the fuel reaction byproducts are further reacted to sequester carbon dioxide in the exothermic reaction, wherein the exothermic reaction produces waste heat and wherein the exothermic reaction waste heat is further utilized to increase energy produced.