System and method for producing hydrogen

Patent metadata

Field	Value
Publication number	US-10053363-B2
Application number	US-201515124725-A
Country	US
Kind code	B2
Filing date	Mar 6, 2015
Priority date	Mar 10, 2014
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

To allow hydrogen to be supplied to a dehydrogenation reaction unit for dehydrogenating an organic hydride by using a highly simple structure so that the activity of the dehydrogenation catalyst of the dehydrogenation reaction unit is prevented from being rapidly reduced. The hydrogen production system ( 1 ) comprises a first dehydrogenation reaction unit ( 3 ) for producing hydrogen by a dehydrogenation reaction of an organic hydride in presence of a first catalyst, and a second dehydrogenation reaction unit ( 4 ) for receiving a product of the first dehydrogenation reaction unit, and producing hydrogen by a dehydrogenation reaction of the organic hydride remaining in the product in presence of a second catalyst, wherein an amount of the first catalyst used in the first dehydrogenation reaction unit is equal to or less than an amount of the second catalyst used in the second dehydrogenation reaction unit, and an amount of hydrogen produced in the first dehydrogenation reaction unit is less than an amount of hydrogen produced in the second dehydrogenation reaction unit.

First claim

The invention claimed is:

1. A system for producing hydrogen by dehydrogenation of an organic hydride, comprising:
a first dehydrogenation reaction unit for producing hydrogen by a dehydrogenation reaction of an organic hydride in presence of a first catalyst; and
a second dehydrogenation reaction unit for receiving a product of the first dehydrogenation reaction unit, and producing hydrogen by a dehydrogenation reaction of the organic hydride remaining in the product in presence of a second catalyst;
wherein an amount of the first catalyst used in the first dehydrogenation reaction unit is equal to or less than an amount of the second catalyst used in the second dehydrogenation reaction unit, and an amount of hydrogen produced in the first dehydrogenation reaction unit is less than an amount of hydrogen produced in the second dehydrogenation reaction unit, and
wherein the first dehydrogenation reaction unit consists of an adiabatic reaction vessel, and the second dehydrogenation reaction unit consists of a heat exchanger type reaction vessel.

2. The system for producing hydrogen according to claim 1 , wherein an outlet temperature of the product of the first dehydrogenation reaction unit is equal to or higher than an inlet temperature of a reactant of the second dehydrogenation reaction unit.

3. The system for producing hydrogen according to claim 1 , wherein an outlet temperature of a product of the second dehydrogenation reaction unit is higher than an inlet temperature of a reactant of the second dehydrogenation reaction unit.

4. The system for producing hydrogen according to claim 1 , wherein a concentration of hydrogen in the product of the first dehydrogenation reaction unit is equal to or greater than 10 vol %.

5. A method for producing hydrogen by dehydrogenation of an organic hydride, comprising:
a first dehydrogenation reaction step for producing hydrogen by a dehydrogenation reaction of an organic hydride in presence of a first catalyst; and
a second dehydrogenation reaction step for receiving a product of the first dehydrogenation reaction unit, and producing hydrogen by a dehydrogenation reaction of the organic hydride remaining in the product in presence of a second catalyst;
wherein an amount of the first catalyst used in the first dehydrogenation reaction step is equal to or less than an amount of the second catalyst used in the second dehydrogenation reaction step, and an amount of hydrogen produced in the first dehydrogenation reaction step is less than an amount of hydrogen produced in the second dehydrogenation reaction step, and
wherein the first dehydrogenation step is performed in an adiabatic reaction vessel, and the second dehydrogenation step is performed in a heat exchanger type reaction vessel.

Assignees

• Chiyoda Corp

Inventors

• Mikuriya Tomoyuki
• Imagawa Kenichi
• Kawai Hironori
• Nakajima Yusuke
• Kanda Takenori

Classifications

• C01B2203/1623

  Adjusting the temperature · CPC title

• C01B2203/16

  Controlling the process · CPC title

• C01B2203/1211

  Organic compounds or organic mixtures used in the process for making hydrogen or synthesis gas · CPC title

• C01B2203/1082

  Composition of support materials · CPC title

• C01B2203/107

  Platinum catalysts · CPC title