摘要:
The present invention relates to a method of producing carbon nanotubes, comprising a catalyst particle forming step of heating and reducing a catalyst raw material to form catalyst particles and a carbon nanotube synthesizing step of flowing a raw material gas onto the heated catalyst particles to synthesize carbon nanotubes, wherein a carbon-containing compound gas without an unsaturated bond is flowed onto the catalyst raw material and/or the catalyst particles in at least one of the catalyst particle forming step and the carbon nanotube synthesizing step.
摘要:
A heat exchanger type reaction tube includes a first tube part that forms a first flow channel into which a feed gas flows and in which the feed gas moves down; a second tube part that forms a second flow channel which is connected to the first flow channel and in which the feed gas moves up and that has a granular catalyst carrying support medium charged therein; and a heating device that heats the first tube part and the second tube part. Then, the first flow channel and the second flow channel are adjacent to each other while being separated from each other by a partition wall, and the second flow channel is provided with a distributor which holds the catalyst carrying support medium and through which the feed gas passes.
摘要:
The present invention relates to a method of producing carbon nanotubes, comprising a catalyst particle forming step of heating and reducing a catalyst raw material to form catalyst particles and a carbon nanotube synthesizing step of flowing a raw material gas onto the heated catalyst particles to synthesize carbon nanotubes, wherein a carbon-containing compound gas without an unsaturated bond is flowed onto the catalyst raw material and/or the catalyst particles in at least one of the catalyst particle forming step and the carbon nanotube synthesizing step.
摘要:
A heat exchanger type reaction tube includes a first tube part that forms a first flow channel into which a feed gas flows and in which the feed gas moves down; a second tube part that forms a second flow channel which is connected to the first flow channel and in which the feed gas moves up and that has a granular catalyst carrying support medium charged therein; and a heating device that heats the first tube part and the second tube part. Then, the first flow channel and the second flow channel are adjacent to each other while being separated from each other by a partition wall, and the second flow channel is provided with a distributor which holds the catalyst carrying support medium and through which the feed gas passes.
摘要:
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 H2 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 H2 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 H2 in a gas flow.