Method of producing hydrogen

Patent metadata

Field	Value
Publication number	US-2023098199-A1
Application number	US-202017801530-A
Country	US
Kind code	A1
Filing date	Sep 29, 2020
Priority date	Feb 28, 2020
Publication date	Mar 30, 2023
Grant date	—

Abstract

Provided is a method of generating hydrogen efficiently using a renewable resource as a raw material.A method of producing hydrogen according to the present disclosure is a method in which hydrogen is generated from a saccharide in the presence of a solvent and the following catalyst:catalyst which contains at least one metal element selected from the metal elements in Groups 8, 9, and 10.The catalyst is preferably a complex or salt of the metal element, and particularly preferably a complex including the at least one metal element selected from the metal elements in Groups 8, 9, and 10 and at least one ligand selected from pentamethylcyclopentadienyl, cyclopentadienyl, p-cymene, and 1,5-cyclooctadiene.As the solvent, it is preferable to use at least one selected from an organic acid and an ionic liquid.The saccharide may be a lignin-saccharide complex, and is preferably cellulose.

First claim

1 .- 14 . (canceled)

15 . A method of producing hydrogen comprising generating hydrogen from at least one saccharide selected from a lignin-saccharide complex and cellulose, the method being performed in presence of the following Solvent and Catalyst:
Solvent: a solvent containing an organic acid and/or an ionic liquid, and may further be containing water with a condition that the water content is 5 parts by weight or less relative to 1 part by weight of the saccharide. Catalyst: a catalyst containing at least one metal element selected from the metal elements in Groups 8, 9, and 10.

16 . The method of producing hydrogen according to claim 15 , wherein the catalyst is a complex or salt of the at least one metal element selected from the metal elements in Groups 8, 9, and 10.

17 . The method of producing hydrogen according to claim 15 , wherein the catalyst is a complex comprising: the at least one metal element selected from the metal elements in Groups 8, 9, and 10; and at least one ligand selected from pentamethylcyclopentadienyl, cyclopentadienyl, p-cymene, and 1,5-cyclooctadiene.

18 . The method of producing hydrogen according to claim 15 , wherein a total amount of the organic acid and the ionic liquid used is from 3 to 300 times by weight of an amount of the saccharide used.

19 . The method of producing hydrogen according to claim 15 , wherein the solvent contains an ionic liquid and water, and a content of the water is from 1 to 20 wt. % of a total weight of the ionic liquid and the water.

20 . The method of producing hydrogen according to claim 15 wherein the ionic liquid comprises an imidazolium cation salt.

21 . The method of producing hydrogen according to claim 15 , comprising subjecting carbon dioxide that has been generated together with the hydrogen to a reaction with a base for removal.

22 . A hydrogen production apparatus that is configured to have a function of producing hydrogen using the method of producing hydrogen described in claim 15 .

23 . A power generation apparatus that is configured to have a function of producing hydrogen using the method of producing hydrogen described in claim 15 and generating power using the obtained hydrogen.

24 . An automobile comprising the power generation apparatus described in claim 23 .

25 . A method of producing a hydride of an organic compound, the method comprising: producing hydrogen using the method of producing hydrogen described in claim 15 ; reducing an organic compound in presence of a metal catalyst using the obtained hydrogen as a reducing agent; and producing a hydride of the organic compound.

Assignees

• Univ Kyoto
• Daicel Corp

Inventors

• Fujita Ken-Ichi
• Watanabe Takashi
• Kobayashi Naoko
• Kitayama Kenji

Classifications

• B01J2231/646

  of aromatic or heteroaromatic rings · CPC title

• C01B2203/066

  with fuel cells · CPC title

• C01B2203/1064

  Platinum group metal catalysts · CPC title

• C01B2203/84

  Energy production · CPC title

• B01J2531/821

  Ruthenium · CPC title