Surface catalyst infra red laser

• US 6,944,202 B2
• Filed: 08/14/2002
• Issued: 09/13/2005
• Est. Priority Date: 05/04/1999
• Status: Expired due to Term

• Current Assignee: NeoKismet, LLC
• Original Assignee: NeoKismet, LLC
• Inventors: Gidwani, Jawahar M., Zuppero, Anthony C.
• Primary Examiner(s): Thomas, Tom
• Assistant Examiner(s): LANDAU, MATTHEW C
• Application Number:
  US10/218,706
• Publication Number:
  US 20020196825A1
• Time in Patent Office: 1,126 Days
• Field of Search: 372/59, 372/90, 372/89, 372/51, 372/52, 372/53, 372/55, 372/69, 357/342
• US Class Current: 372/89
• CPC Class Codes: B01J 23/34 Manganese
• CPC Class Codes: B01J 23/40 of the platinum group metals
• CPC Class Codes: C01B 3/386 Catalytic partial combustion
• CPC Class Codes: H01L 29/66 Types of semiconductor device ; Multistep manufacturing processes therefor
• CPC Class Codes: H01S 3/095 using chemical or thermal pumping
• CPC Class Codes: H01S 3/0953 Gas dynamic lasers, i.e. with expansion of the laser gas medium to supersonic flow speeds
• CPC Class Codes: H01S 3/22 Gases
• CPC Class Codes: H01S 3/223 the active gas being polyatomic, i.e. containing two or more atoms H01S3/227 takes precedence
• CPC Class Codes: H02S 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy
• CPC Class Codes: Y02P 20/52 using catalysts, e.g. selective catalysts

Abstract

An energy converter reacts hydrocarbons and air on a catalyst configuration to produce a population inversion. A photovoltaic system may extract the radiating energy, and a laser system may extract a significant fraction of the reaction energy in the form of coherent radiation. The flooding of the catalyst adsorption sites with fuel and the choice of catalyst predisposes the adsorbing oxygen molecules to create mono-atomic oxygen hot-atoms, which deposit the considerable energy of oxygen adsorption directly into a reaction channel of adjacent, adsorbed and simple fuel radicals, thereby producing simple, energetic product molecules, concentrating the energy in one or a few modes, and strongly favoring inverted populations. A solid state method to stimulate precursor chemisorbed specie dissociation accelerates the reaction rates, providing a method to greatly intensify pulsed power output, increase efficiency, and to facilitate nano-scale and micro-scale thermal energy heat rejection processes.

Claims

1. An apparatus to extract energy from a chemical reaction by using hot atom reactions, comprising:

a porous substrate;

a catalyst placed on the substrate for allowing reactions to occur on a surface of the catalyst; and

at least two optical elements placed near opposite ends of the surface and forming an optical cavity in a region of catalytic surface reaction, the at least two optical elements operable to extract laser energy from the reactions; and

at least a first wall surrounding the catalyst surface forming a first channel between the catalytic surface and the first wall, the region of catalytic surface reaction being exposed to the first channel, the first channel being a conduit through which reactants enter the region of catalytic surface reaction, wherein the catalyst includes a nanocluster on an oxide substrate.

2. The apparatus of claim 1, wherein the nanocluster includes gold on titania, or a metal on an oxide, or combinations thereof.

3. An apparatus to extract energy from a chemical reaction by using hot atom reactions, comprising:

a porous a substrate;

a catalyst placed on the substrate for allowing reactions to occur on a surface of the catalyst; and

at least two optical elements placed near opposite ends of the surface and forming an optical cavity in a region of catalytic surface reaction, the at least two optical elements operable to extract laser energy from the reactions; and

at least a first wall surrounding the catalyst surface forming a first channel between the catalytic surface and the first wall, the region of catalytic surface reaction being exposed to the first channel, the first channel being a conduit through which reactants enter the region of catalytic surface reaction, wherein the porous substrate includes zeolite or aerogell material or combinations thereof.

4. An apparatus to generate hot atoms, comprising:

a porous substrate;

a catalyst placed on the substrate for allowing reactions to occur on a surface of the catalyst, the catalyst including at least one or more nano-islands of catalyst deposited with thickness less than a penetration depth of optical radiation extracted from the apparatus;

at least two optical elements placed near opposite ends of the surface and forming an optical cavity in a region of catalytic surface reaction, the at least two optical elements operable to extract laser energy from the reactions; and

at least a first wall surrounding the catalyst surface forming a first channel between the catalytic surface and the first wall, the region of catalytic surface reaction being exposed to the first channel, the first channel being a conduit through which reactants enter the region of catalytic surface reaction.

5. The apparatus of claim 4, wherein inter-island spacing of the one or more nano-islands of catalyst is at least several atomic dimensions.

6. The apparatus of claim 5, wherein catalyst island dimensions are at least less than a quarter wavelength of radiation extracted from the apparatus.

7. An apparatus to generate hot atoms, comprising:

a porous substrate;

a catalyst placed on the substrate for allowing reactions to occur on a surface of the catalyst;

at least two optical elements placed near opposite ends of the surface and forming an optical cavity in a region of catalytic surface reaction, the at least two optical elements operable to extract laser energy from the reactions; and

at least a first wall surrounding the catalyst surface forming a first channel between the catalytic surface and the first wall, the region of catalytic surface reaction being exposed to the first channel, the first channel being a conduit through which reactants enter the region of catalytic surface reaction, wherein the porous substrate includes a non-conducting substrate favoring fuel adsorption, and the catalyst includes one or more nanometer dimension catalyst islands favoring oxygen adsorption.

8. The apparatus of claim 7, wherein the non-conducting substrate includes aluminum oxide, silicon oxide, titanium oxide, or ionic salts, or combinations thereof.

9. An apparatus to generate hot atoms, comprising:

a porous substrate;

a catalyst placed on the substrate for allowing reactions to occur on a surface of the catalyst; and

at least two optical elements placed near opposite ends of the surface and forming an optical cavity in a region of catalytic surface reaction, the at least two optical elements operable to extract laser energy from the reactions; and

at least a first wall surrounding the catalyst surface forming a first channel between the catalytic surface and the first wall, the region of catalytic surface reaction being exposed to the first channel, the first channel being a conduit through which air enters the region of catalytic surface reaction.

10. The apparatus of claim 9, wherein the catalyst is Platinum, Iridium, Rhodium, Ruthenium, Palladium, Tungsten or a transition metal, or combinations thereof.

11. The apparatus of claim 9, wherein the catalyst includes catalyst islands of gold on titanium oxides.

12. The apparatus of claim 9, wherein the porous substrate includes a dielectric reflector.

13. The apparatus of claim 9, wherein the substrate is a non-conducting ionic solid.

14. The apparatus of claim 9, wherein the optical cavity further includes a dichroic resonator.

15. The apparatus of claim 9, wherein exhausts from the reaction leave the region via the first channel.

16. The apparatus of claim 9, wherein the optical elements include:

a first laser mirror disposed adjacent to one end of the substrate; and

a second laser mirror disposed adjacent to an opposite end of the substrate, the first and the second laser mirrors forming the optical cavity in the region of catalytic surface reaction.

17. An apparatus to generate hot atoms, comprising:

a porous substrate;

a catalyst placed on the substrate for allowing reactions to occur on a surface of the catalyst;

at least two optical elements placed near opposite ends of the surface and forming an optical cavity in a region of catalytic surface reaction, the at least two optical elements operable to extract laser energy from the reactions;

at least a first wall surrounding the catalyst surface forming a first channel between the catalytic surface and the first wall, the region of catalytic surface reaction being exposed to the first channel, the first channel being a conduit through which reactants enter the region of catalytic surface reaction; and

a second wall surrounding a bottom side of the porous substrate that is opposite the catalytic surface, the second wall and the bottom side forming a second channel between the second wall and the bottom side,

wherein reactants are enabled to enter the region via the second channel and the porous substrate.

18. An apparatus to extract optical energy from a chemical reaction, comprising:

one or more porous substrates capable of permitting a flow of reactants through the one or more porous substrates;

one or more catalysts formed on the substrate, at least one of the one or more catalysts exhibiting a potential barrier to chemical reactants on the catalyst, the potential barrier causing a slowing effect of at least one of dissociation upon adsorption on the catalyst, charge acquisition by the chemical reactants on the catalyst, and further chemical reaction on the catalyst;

a supply of one or more chemical reactants selected from those known to produce hot atoms from the one or more reactants reacting with the one or more catalyst and to cause simple, vibrationally energetic molecules to be generated as a result of the hot atoms reacting with the one or more reactants or reaction products;

one or more means of cooling one or more surfaces of the one or more catalysts formed on the substrate, to enhance the slowing effect of the potential barrier;

one or more reaction initiators;

one or more channels to convey reactants to and exhausts away from the one or more surfaces;

an optical system coupled to a region including the vibrationally energetic molecules and configured to extract optical energy from the vibrationally energetic molecules.

19. The apparatus of claim 18, wherein the one or more catalysts include Platinum, Iridium, Rhodium, Ruthenium, Palladium, Tungsten, or a transition metal, or combinations thereof.

20. The apparatus of claim 18, wherein the one or more catalysts include a nanocluster no more than several monolayers thick on an oxide substrate.

21. The apparatus of claim 20, wherein the nanocluster includes gold on titania or a metal on an oxide, or combinations thereof.

22. The apparatus of claim 18, wherein the one or more catalyst includes catalyst islands of gold on titanium oxides.

23. The apparatus of claim 18, wherein the one or more substrates includes zeolite or aerogell materials or combinations thereof.

24. The apparatus of claim 18, wherein the one or more substrates includes a dielectric reflector.

25. The apparatus of claim 24, wherein one or more nano-islands of catalyst are deposited with thickness less than a penetration depth of optical radiation extracted from the apparatus.

26. The apparatus of claim 25, wherein inter-island spacing of the one or more nano-islands of catalyst is at least several atomic dimensions.

27. The apparatus of claim 26, wherein catalyst island dimensions are at least less than a quarter wavelength of radiation extracted from the apparatus.

28. The apparatus of claim 18, wherein the one or more substrates includes a non-conducting substrate favoring fuel adsorption, and one or more of the one or more catalysts includes one or more nanometer dimension catalyst islands favoring oxygen adsorption,

wherein a product of a reaction occurring on the a catalyst migrates to reside on and reacts with a product of the fuel adsorbed on the non-conducting substrate.

29. The apparatus of claim 28, wherein the non-conducting substrate includes aluminum oxide, silicon oxide, titanium oxide, or ionic salts, or combinations thereof.

30. The apparatus of claim 18, wherein the one or more substrates is a non-conducting ionic solid.

31. The apparatus of claim 18, wherein the optical cavity further includes a dichroic resonator.

32. The apparatus of claim 18, further including:

a first wall along a catalyst surface side of the one or more substrates, forming a first channel between the one or more substrates and the first wall, the first channel defining a reaction region and allowing one or more reactants to enter the reaction region via the first channel.

33. The apparatus of claim 32, wherein exhausts from the reaction region leave the reaction region via the first channel.

34. The apparatus of claim 32, further including:

a second wall along a bottom side of the one or more substrates, the bottom side being a side opposite the catalytic surface side of the one or more substrates, the second wall and the bottom side forming a second channel between the second wall and the bottom side,

wherein one or more reactants are enabled to enter the reaction region via the second channel through the one or more substrates.

35. The apparatus of claim 18, wherein the optical system includes:

a first laser mirror disposed adjacent to one end of one or more of the one or more substrates;

a second laser mirror disposed adjacent to an opposing end of the one or more substrates, the first and the second laser mirrors forming an optical cavity in the region of catalytic surface reaction.

36. The apparatus of claim 18, wherein the one or more reactants include at least an oxygen present in air and a fuel including at least carbon monoxide or hydrogen or both, a ratio of the fuel to the oxygen rendering the one or more reactants oxygen-rich.

37. The apparatus of claim 18, wherein the one or more catalysts are formed on the one or more substrates with features differing from an atomically smooth monolayer.

38. The apparatus of claim 35, further including:

means for stimulating emission from highly vibrationally excited molecules, which stimulating begins with stimulating transitions downward from highest energy vibrational levels and ends with stimulating emissions downward from lower energy levels; and

means to chirp resonance of the optical cavity in a sequence starting from a frequency corresponding to a higher energy level to a frequency corresponding to a lower energy level.

39. The apparatus of claim 38, further including:

means for supplying a frequency chirped, time sequenced stimulation radiation to a region including reaction products.

40. The apparatus of claim 18, further including:

means for initiating reactions comprising a means for injecting hot electrons into the one or more catalysts, the means for injecting hot electrons include a Schottky diode, a p-n junction diode, a conductor insulator metal device, or a conductor semiconductor metal device, or combinations thereof.