Method for generating hydrogen

Patent metadata

Field	Value
Publication number	US-11780729-B2
Application number	US-202117348539-A
Country	US
Kind code	B2
Filing date	Jun 15, 2021
Priority date	Feb 8, 2021
Publication date	Oct 10, 2023
Grant date	Oct 10, 2023

Abstract

A hydrogen generating method includes generating hydrogen by dehydrogenation-reacting a chemical hydride of a solid state with an acid aqueous solution. The dehydrogenation-reaction is performed by reacting 1 mol of hydrogen atoms of the chemical hydride with an acid and water at a molar ratio of 0.5 to 2.

First claim

What is claimed is:

1. A hydrogen generating method comprising:
generating hydrogen by a dehydrogenation reaction of a chemical hydride of a solid state with an acid aqueous solution,
wherein the dehydrogenation reaction is performed by reacting 1 mol of hydrogen atoms of the chemical hydride with an acid and water at a molar ratio of 0.5 to 2,
wherein the chemical hydride comprises NaBH 4 ,
wherein the acid comprises formic acid, and
wherein a temperature of the dehydrogenation reaction is in a range of 10° C. to 400° C., and a pressure of the dehydrogenation reaction is in a range of 1 bar to 100 bar.

2. The hydrogen generating method of claim 1 , wherein the dehydrogenation reaction is performed under a presence of a homogeneous catalyst comprising ruthenium(III) acetylacetonate (Ru(acac) 3 ); carbonylchlorohydrido {bis[2-(diphenyl phosphinomethyl)ethyl] amino} ruthenium(II); ruthenium(II) triphenylphosphine monosulfonate (RuCl 2 (m-triphenylphosphine monosulfonate) 2 ); ruthenium(II) benzene; RuCl 2 (benzene) with 1,2-bis(diphenylphosphino)methane, or a combination thereof.

3. The hydrogen generating method of claim 1 , wherein a gas product generated in the dehydrogenation reaction comprises 99 volume % or greater of hydrogen and 1 volume % or less of water.

4. The hydrogen generating method of claim 1 , wherein the dehydrogenation reaction is performed in a dehydrogenation reaction device comprising a dehydrogenation reactor & having the chemical hydride of the solid state and an acid aqueous solution tank supplying the acid aqueous solution to the dehydrogenation reactor, and
wherein the dehydrogenation reactor comprises a heating device, a cooling apparatus, a porous metal foam, or a combination thereof.

5. The hydrogen generating method of claim 4 , wherein the porous metal foam is a porous nickel foam or a porous cobalt-nickel foam.

6. The hydrogen generating method of claim 4 , wherein the acid aqueous solution is supplied to the dehydrogenation reactor by gravity or a pump.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Korea Inst Sci & Tech

Inventors

• Kim Pyung Soon
• Choung Jin Woo
• Seo Jihui
• Sohn Hyuntae
• Lee Yu-Jin
• Jeong Hyangsoo
• Kim Yoondo
• Yoon Chang Won
• Kim Yongmin

Classifications

• C01B3/065 Primary

  by reaction of inorganic compounds with hydrides · CPC title

• H01M8/065

  by dissolution of metals or alloys; by dehydriding metallic substances · CPC title

• C01B2203/066

  with fuel cells · CPC title

• C01B2203/1029

  Catalysts in the form of a foam · CPC title

• C01B2203/1058

  Nickel catalysts · CPC title