Hitachi Chemical Company, Ltd.

The University of Tokyo

Waseda University

Meidensha Corporation

Meijo Nano Carbon Co., Ltd.

Hisashi Sugime

Suguru Noda

Toshio Osawa

Dong Young Kim

Kei Hasegawa

Yukio Yamaguchi

Eisuke Haba

Toshimasa Fukai

Daizo Takahashi

Yuichi Nishikiori

Hayato Ochi

Rena Takahashi

Kotaro Yasui

Zihao Zhang

Kazunori Kakehi

Sae Kitagawa

Katsuya Namiki

Provided are a carbon nanotube production device and production method capable of realizing high-temperature heating of a catalyst raw material in a floating catalyst chemical vapor deposition (FCCVD) method, and improving the quality and yield of carbon nanotubes synthesized. A carbon nanotube production deviceincludes a synthesis furnacefor synthesizing carbon nanotubes; a catalyst raw material supplying nozzlefor supplying a catalyst raw material used to synthesize carbon nanotubes to the synthesis furnace; and a nozzle temperature adjusting unitcapable of setting a temperature of an inner portionof the catalyst raw material supplying nozzlehigher than a temperature of a reaction fieldof the synthesis furnace. By supplying to the synthesis furnacethe catalyst raw material that has been thermally decomposed after being heated to a temperate at which a catalyst metal will not yet be condensed, and by having the thermally decomposed catalyst raw material rapidly cooled to a CVD temperature at the synthesis furnace, microscopic catalyst metal particles will be generated at a high density in the space of the reaction fieldsuch that carbon nanotubes having a small diameter can be vapor-grown at a high density.

Manufacturing apparatus and manufacturing method for carbon nanotube

It is a CNT device () (carbon-metal structure) equipped with a carbon nanotube layer () (CNT layer; same hereafter) on a metal pedestal (). The metal pedestal () is brazed to the CNT layer () with a brazing material layer () interposed therebetween. When manufacturing the CNT device (), firstly, the CNT layer () is formed on a heat-resistant textured substrate (). Next, the metal pedestal () is brazed to the CNT layer () that is on the heat-resistant textured substrate () with the brazing material layer () interposed therebetween. Then, the metal pedestal () (and the CNT layer) is peeled off the heat-resistant textured substrate () to transfer the CNT layer () from the heat-resistant textured substrate () to the metal pedestal ().

Carbon-metal structure and method for manufacturing carbon-metal structure

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 Hfrom the carbon source, the above carbon nanotubes are synthesized on a support in a heated state, placed in a reactor, and simultaneously, the above His 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 Hin a gas flow.

Device for simultaneously producing carbon nanotubes and hydrogen

The method for producing carbon nanotubes employs a carbon source that contains carbon and is decomposed when heated and a catalyst on a support that serves as a catalyst for production of carbon nanotubes from the carbon source. The method includes a catalyst loading step in which the catalyst starting material is distributed over the support to load the catalyst onto the support, a synthesis step in which the carbon nanotubes are synthesized on the support, and a separating step in which a separating gas stream is distributed over the support to separate the carbon nanotubes from the support, wherein the catalyst loading step, the synthesis step and the separating step are carried out while keeping the support in a heated state and switching supply of the catalyst starting material, the carbon source and the separating gas stream.

Carbon nano-tube manfuacturing method and carbon nano-tube manufacturing apparatus

Method for simultaneously producing carbon nanotubes and hydrogen, and device for simultaneously producing carbon nanotubes and hydrogen

[Problems to be Solved]There is provided a method for production of a carbon nanotube, which allows for production of the carbon nanotube in a large scale and at a low cost. [Solution] The temperature of a catalyst loaded on a support is raised by heating the support and a raw material gas containing a carbon source is supplied on the catalyst to synthesize the carbon nanotube. The synthesized carbon nanotube is recovered, and after the recovery, the catalyst is subjected to a regeneration treatment to repeatedly utilize the support. Since the catalyst deteriorates, the catalyst is regenerated periodically or nonperiodically during the production. The regeneration treatment of the catalyst involves an oxidation treatment of the catalyst. Further, after the oxidation treatment, a reducing gas is fed to and brought into contact with the catalyst surface to reduce the catalyst. As the support, a honeycomb is used.

Method for production of carbon nanotube

Growing community of inventors

Tokyo, Japan

Hisashi Sugime