Device for simultaneously prodcing carbon nanotubes and hydrogen

Patent metadata

Field	Value
Publication number	US-2016002033-A1
Application number	US-201514744307-A
Country	US
Kind code	A1
Filing date	Jun 19, 2015
Priority date	Sep 10, 2009
Publication date	Jan 7, 2016
Grant date	—

Abstract

A method for simultaneously producing carbon nanotubes and hydrogen according to the present invention is a method for simultaneously producing carbon nanotubes and hydrogen, in which using a carbon source containing carbon atoms and hydrogen atoms and being decomposed in a heated state, and a catalyst for producing carbon nanotubes and H 2 from the carbon source, the above carbon nanotubes are synthesized on a support in a heated state, placed in a reactor, and simultaneously, the above H 2 is synthesized from the above carbon source, the method comprising a synthesis step of flowing a source gas comprising the above carbon source over the above support, on which the above catalyst is supported, to synthesize the above carbon nanotubes on the above support and simultaneously synthesize the above H 2 in a gas flow.

First claim

1 . An apparatus for simultaneously producing carbon nanotubes and hydrogen, comprising:
a carbon source feeding apparatus for feeding a carbon source containing carbon atoms and hydrogen atoms and being decomposed in a heated state; a catalytic reaction apparatus for decomposing the carbon source by a catalyst supported on a support to synthesize carbon nanotubes on the support and synthesize H 2 in a gas flow; a carbon nanotube recovery apparatus for recovering the carbon nanotubes from the catalytic reaction apparatus; and a H 2 recovery apparatus for recovering the H 2 from the catalytic reaction apparatus.

2 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 1 , wherein
the carbon nanotube recovery apparatus recovers the carbon nanotubes together with the support in a state in which the carbon nanotubes are held on the support, and the H 2 recovery apparatus recovers the H 2 from an emission gas emitted from the catalytic reaction apparatus.

3 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 1 , further comprising
a separation gas feeding apparatus for feeding a separation gas for separating the carbon nanotubes from the support into a gas flow, wherein the carbon nanotube recovery apparatus recovers the carbon nanotubes from a emission gas emitted from the catalytic reaction apparatus, and the H 2 recovery apparatus recovers the H 2 from the emission gas.

4 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 3 , further comprising an oxidizing gas feeding apparatus for feeding an oxidizing gas for removing carbon remaining on the support from which the carbon nanotubes are separated.

5 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 1 , further comprising a catalyst source feeding apparatus for feeding a catalyst source, which is a source of the catalyst, in a gas state onto the support.

6 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 1 , further comprising a support feeding apparatus for feeding the support, on which a catalyst source, which is a source of the catalyst is supported, to the catalytic reaction apparatus.

7 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 1 , further comprising a support feeding apparatus for feeding the support, on which the catalyst is supported, to the catalytic reaction apparatus.

8 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 1 , further comprising a switching apparatus for switching feed of any two or more of the carbon source, the separation gas, the catalyst source, the oxidizing gas, and the support.

9 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 1 , wherein:
the catalytic reaction apparatus comprises:
an upper part;
a lower part; and
a heater covering at least a portion of the lower part;
the carbon source feeding apparatus comprises a feed pipe connected to the lower part of the reaction apparatus; the carbon nanotube recovery apparatus comprises a cyclone connected to the upper part of the reaction apparatus; and the H 2 recovery apparatus is connected to the cyclone of the carbon nanotube recovery apparatus.

10 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 1 , further comprising a plurality of support particles within the catalytic reaction apparatus, the support particles comprising a carrier layer and at least one catalyst nanoparticle partly buried in the carrier layer.

11 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 9 , further comprising a separation gas feeding apparatus, the separation gas feeding apparatus comprising a feed pipe connected to the catalytic reaction apparatus.

12 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 9 , further comprising an oxidizing gas feeding apparatus, the oxidizing gas feeding apparatus comprising a feed pipe connected to the catalytic reaction apparatus.

13 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 9 , further comprising a catalyst source feeding apparatus, the catalyst source feeding apparatus comprising a feed pipe connected to the catalytic reaction apparatus.

14 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 13 , further comprising a carrier source gas feeding apparatus, the carrier source gas feeding apparatus comprising a feed pipe connected to the catalytic reaction apparatus.

15 . The apparatus for simultaneously producing carbon nanotubes and hydrogen according to claim 14 , further comprising a plurality of support particles within the catalytic reaction apparatus, the support particles comprising:
a carrier layer, at least a portion of the carrier layered formed by a carrier gas fed from the carrier source gas feeding apparatus; and at least one catalyst nanoparticle partly buried in the carrier layer, the catalyst nanoparticle deposited by a catalyst source vapor fed from the catalyst source feeding apparatus.

Assignees

• Univ Tokyo
• Hitachi Chemical Co Ltd

Inventors

• Noda Suguru
• Kim Dong Young
• Osawa Toshio
• Sugime Hisashi
• Hasegawa Kei
• Haba Eisuke

Classifications

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• B01J37/086

  Decomposition of an organometallic compound, a metal complex or a metal salt of a carboxylic acid · CPC title

• B01J37/347

  Ionic or cathodic spraying; Electric discharge · CPC title

• B01J21/04

  Alumina · CPC title

• B01J37/0201

  Impregnation · CPC title