Apparatus and method for producing nanocarbon material

Patent metadata

Field	Value
Publication number	US-9458018-B2
Application number	US-201314375284-A
Country	US
Kind code	B2
Filing date	Feb 26, 2013
Priority date	Feb 29, 2012
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

Catalyst support means for producing a fluid catalyst; a reduction basin that pretreats an active metal of the obtained fluid catalyst in a reducing atmosphere; a fluid bed reactor which is supplied with a reduction-treated fluid catalyst having undergone the reduction, for producing a nanocarbon material; and a moisture application basin for supplying a slight amount of moisture to a source gas to be supplied to the aforementioned fluid bed reactor are provided.

First claim

The invention claimed is:

1. A method for producing a nanocarbon material, comprising:
reducing a fluid catalyst having an active metal with a reducing agent;
growing a nanocarbon material in the active metal of the fluid catalyst by supplying the reduced fluid catalyst, a source gas, and moisture to a fluid bed, wherein for the moisture, a ratio of the moisture/the source gas is in a range of 0.0002 to 0.0008;
recovering a gas discharged from a fluid bed reactor after growing the nanocarbon material; and
separating hydrogen from the discharged gas, wherein the separated hydrogen is introduced and used as the reducing agent for reducing the fluid catalyst.

2. The method for producing a nanocarbon material according to claim 1 , wherein the reducing agent in the reduction step is hydrogen, NH 4 , silane, or disilane.

3. The method for producing a nanocarbon material according to claim 1 ,
further comprising granulating the fluid catalyst having the active metal so as to have a particle size in a range of 0.05 to 10 mm.

4. The method for producing a nanocarbon material according to claim 1 ,
further comprising preventing reoxidation of the reduced fluid catalyst.

5. The method for producing a nanocarbon material according to claim 1 , wherein in the growing of the nanocarbon material, the moisture supplied to the fluid bed causes amorphous carbon generated in the active metal to disappear.

6. An apparatus for producing a nanocarbon material, comprising:
a reduction basin for reducing an active metal;
a fluid bed reactor that is provided downstream of the reduction basin and is configured to grow a nanocarbon material by means of a reduction-treated fluid catalyst having undergone reduction;
a gas line that is connected to the fluid bed reactor and is configured to supply a source gas to the fluid bed reactor;
a moisture application part that is connected to the gas line and is configured to supply a slight amount of moisture to the fluid bed reactor; and
a hydrogen separator that is provided between the fluid bed reactor and the reduction basin and is configured to separate hydrogen contained in a gas discharged from the fluid bed reactor to introduce the hydrogen into the reduction basin.

7. A method for producing a nanocarbon material, comprising:
reducing a fluid catalyst having an active metal with a reducing agent;
growing a nanocarbon material in the active metal of the fluid catalyst by supplying the reduced fluid catalyst, a source gas, and a moisture to a fluid bed;
recovering a gas discharged from a fluid bed reactor after growing the nanocarbon material; and
separating hydrogen from the discharged gas, wherein the separated hydrogen is introduced and used as the reducing agent for reducing the fluid catalyst.

8. The method for producing a nanocarbon material according to claim 7 , wherein the reducing agent in the reduction step is hydrogen, NH 4 , silane, or disilane.

9. The method for producing a nanocarbon material according to claim 7 , further comprising granulating the fluid catalyst having the active metal so as to have a particle size in a range of 0.05 to 10 mm.

10. The method for producing a nanocarbon material according to claim 7 , further comprising preventing reoxidation of the reduced fluid catalyst.

11. The method for producing a nanocarbon material according to claim 7 , wherein in the growing of the nanocarbon material, the moisture supplied to the fluid bed causes amorphous carbon generated in the active metal to disappear.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Sugiyama Tomoaki
• Tatsuhara Kiyoshi
• Koshiro Ikumasa
• Tanaka Atsushi
• Mori Yasushi
• Kurisaki Takashi

Classifications

• B01J23/888

  Tungsten · CPC title

• C01B31/0293 Primary

  Chemistry & Metallurgy · mapped topic

• D01F9/127 Primary

  by thermal decomposition of hydrocarbon gases or vapours {or other carbon-containing compounds in the form of gas or vapour, e.g. carbon monoxide, alcohols} · CPC title

• C01B31/0206

  Chemistry & Metallurgy · mapped topic

• C01B31/0233

  Chemistry & Metallurgy · mapped topic