Excess enthalpy upon pressurization of nanosized metals with deuterium

Patent metadata

Field	Value
Publication number	US-9182365-B2
Application number	US-201313921195-A
Country	US
Kind code	B2
Filing date	Jun 18, 2013
Priority date	Sep 29, 2009
Publication date	Nov 10, 2015
Grant date	Nov 10, 2015

Abstract

A method for producing excess enthalpy by impregnating metallic precursors on an oxide support that reduces sintering and particle growth; drying the impregnated support at a temperature where the particle growth is minimal; reducing the metallic precursors at a second temperature where the particle growth results in supported metallic particles 2 nm or less in size; and pressurizing the supported metallic particles in the presence of deuterium. The metal particles may comprise palladium, platinum, mixtures thereof, or mixtures of palladium and/or platinum with other elements. Also disclosed is a method for measuring excess enthalpy by placing a test material in a pressure vessel; heating the pressure vessel; evacuating the pressure vessel; introducing deuterium, hydrogen, or both into the pressure vessel; measuring the enthalpy generated during pressurization; again evacuating the pressure vessel; and measuring the enthalpy used during depressurization.

First claim

What is claimed as new and desired to be protected by Letters Patent of the United States is:

1. A method for measuring excess enthalpy, comprising:
placing a test material in a pressure vessel;
heating the pressure vessel to a given temperature;
evacuating the pressure vessel;
introducing deuterium, hydrogen, or both into the pressure vessel;
measuring the enthalpy generated during pressurization;
again evacuating the pressure vessel; and
measuring the enthalpy used during depressurization.

2. The method of claim 1 , wherein the test material comprises dispersed metal particles 2 nm or less in size in an oxide support that reduces sintering and particle growth.

3. The method of claim 2 , wherein the metal particles comprise, palladium, platinum, or any combination thereof.

4. The method of claim 2 , wherein the oxide support is a zeolite or alumina.

5. The method of claim 1 , wherein the temperature is less than 300° C.

6. The method of claim 1 , wherein the temperature is less than 100° C.

7. The method of claim 1 , wherein when the pressure vessel is again evacuated, all of the deuterium, hydrogen, or both that was introduced into the system is removed.

8. The method of claim 1 , wherein the test material is pressurized to 100 psi or below.

9. The method of claim 1 , wherein the test material is pressurized to 50 psi or below.

Assignees

• Kidwell David A
• Us Navy

Inventors

• Kidwell David A

Classifications

• B01J21/04 Primary

  Alumina · CPC title

• B01J23/44

  Palladium · CPC title

• B01J23/63

  with rare earths or actinides · CPC title

• B01J23/42

  Platinum · CPC title

• G01N25/48 Primary

  on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation · CPC title