# US 10,118,821 B2 · Method and apparatus for efficient on-demand production of H2 and O2 from water using waste heat and environmentally safe metals

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- Number: US 10,118,821 B2
- Document ID: US10118821B2
- Status: Granted
- Kind: B2
- Application number: 15/204,609
- Filed: 2016-07-07
- Published: 2016-11-03
- Granted: 2018-11-06
- Earliest claimed: 2009-02-20
- Assignees: Marine Power Products Incorporated
- Applicants: Marine Power Products Incorporated
- Inventors: Jeff Carey
- Web page: https://patentgrep.com/patent/US10118821B2

## CPC

- C01B 3/042: Decomposition of water (by electrolysis of water C25B1/04)
- B01J 7/02: by wet methods
- B01J 21/02: Boron or aluminium; Oxides or hydroxides thereof
- B01J 23/50: Silver
- B01J 23/72: Copper
- B01J 38/48: Liquid treating or treating in liquid phase, e.g. dissolved or suspended
- C01B 3/04: by decomposition of inorganic compounds (reversible storage of hydrogen C01B3/0018)
- C01B 13/0203: {from inorganic compounds}
- C25B 1/04: by electrolysis of water
- C25B 11/075: consisting of a single catalytic element or catalytic compound
- C25B 15/02: Process control or regulation
- C25B 15/08: Supplying or removing reactants or electrolytes; Regeneration of electrolytes
- C25B 15/087: {Recycling of electrolyte to electrochemical cell}
- B01J 2219/00006: Large-scale industrial plants
- B01J 2219/00144: Sunlight; Visible light
- Y02E 60/36: Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
- Y02P 20/129: Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C25B: ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR (anodic or cathodic protection C23F13/00; single-crystal growth C30B)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A method of and apparatus for efficient on-demand production of H2 and O2 from water and heat using environmentally safe metals are disclosed. In one aspect, the apparatus for the hydrogen generation through water decomposition reaction includes a main reactor, an oxidizer reactor, and a computer controlling system. The main reactor contains a hydrogen generating substance, such as aluminum hydroxide. In some embodiments, the main reactor includes hydroxide shuttles, such as Cu ion and Ag ion. In another aspect, the system for hydrogen generation through water decomposition includes the steps of (1) REDOX reaction, (2) pre-generation reaction, (3) generation reaction, (4) regeneration reaction, (5) second hydrogen reaction, and (6) oxygen reaction.

## Claims

### Claim 1

A method of hydrolysis comprising:
a. applying a voltage to a solution containing a hydrogen generating catalyst, thereby generating hydrogen gas, wherein the hydrogen generating catalyst comprises aluminum ions;
b. regenerating the hydrogen generating catalyst by reacting the hydrogen generating catalyst with a catalyst reviving substance, wherein the catalyst reviving substance comprises copper ions, silver ions, or a combination thereof; and
c. regenerating the catalyst reviving substance by exposing the catalyst reviving substance to a light.

### Claim 2 (depends on 1)

The method of claim 1 further comprising heating the solution between 75° F.˜185° F.

### Claim 3 (depends on 1)

The method of claim 1, wherein the light comprises a wavelength capable of regenerating the catalyst reviving substance to a state that is able to regenerate the hydrogen generating catalyst to a state that is able to generate hydrogen gas.

### Claim 4 (depends on 1)

The method of claim 1, wherein the light comprises a wavelength approximately in the range of 350 nm to 750 nm.

### Claim 5 (depends on 1)

The method of claim 1, wherein the light comprises a green LED light.

### Claim 6 (depends on 1)

The method of claim 1 further comprising dissociating an oxygen from the catalyst reviving substance.

### Claim 7 (depends on 1)

The method of claim 1, wherein the hydrogen generating catalyst lowers the activation energy of the electric hydrolysis to below 1.1V in magnitude.

### Claim 8 (depends on 1)

The method of claim 1, wherein the voltage is between −0.4V to −0.9V.

### Claim 9 (depends on 1)

The method of claim 1 further comprising ionizing aluminum, copper, and silver into the solution.

### Claim 10 (depends on 9)

The method of claim 9, wherein the ionization is performed by applying a positive voltage to the aluminum, copper, silver, or a combination thereof.