Abstract: The present invention provides a carbon nanomaterial production apparatus 1 that includes a reaction tube 2 into which raw material gas and carrier gas are supplied and accordingly in which carbon nanomaterial is grown, a connection tube 4 that is connected to the reaction tube 2 and through which an aerosol-like mixture of the carbon nanomaterial and the carrier gas passes, and a collection tube 3 that is connected to the connection tube 4 and collects the carbon nanomaterial from the mixture. The collection tube 3 includes a discharge section 32 that is located above a junction 33 with the connection tube 4 and discharges the carrier gas contained in the mixture to outside, and a trapping section 31 that is located below the junction 33 with the connection tube 4 and traps the carbon nanomaterial that is separated from the mixture by gravitational sedimentation.

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 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.

Abstract: A drum sputtering device that can uniformly deposit target atoms on all over particles is provided. The drum sputtering device includes a vacuum container 2 that contains particles, a tubular drum 10 that is arranged inside the vacuum container 2 and at least one end face 10c of which is open, and a sputtering target 16 that is arranged inside the drum 10. With a supporting arm 11, a drive motor 12 for rotation, a drive motor 13 for swing, a first gear member 14, and a second gear member 15, the drum can be rotated around the axis of the drum 10 and the drum 10 can be swung so that one end portion 10e and the other end portion 10f in the axial direction of the drum 10 are relatively vertically switched.

Abstract: 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.

Abstract: Single walled carbon nanotubes can be synthesized and production efficiency of carbon nanotubes can be enhanced by a method including a supplying step (S11) in which particulate carriers are supplied into a drum, a sputtering step (S12) for supporting a catalyst, in which sputtering is performed while this drum 10 is rotated around the axis and is swung so that one end portion and the other end portion in the axial direction of the drum 10 are relatively vertically switched, and a recovering step (S13) in which the particulate carriers are recovered by inclining the drum to discharge the particulate carriers from the drum.

Abstract: The present invention relates to a method for producing carbon nanotubes, comprising a synthesis step of synthesizing carbon nanotubes on a support on which a catalyst is supported by flowing a source gas consisting of acetylene, carbon dioxide, and an inert gas over the support, wherein in the source gas, a partial pressure of the acetylene is 1.33×101 to 1.33×104 Pa, a partial pressure of the carbon dioxide is 1.33×101 to 1.33×104 Pa, and a partial pressure ratio of the acetylene to the carbon dioxide (acetylene/carbon dioxide) is in the range of 0.1 to 10.

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 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.

Abstract: 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.

Abstract: The present invention relates to metal catalyst particles for carbon nanotube synthesis, comprising carbon-containing regions on their surfaces.

Abstract: The present invention relates to a method for producing carbon nanotubes, comprising a synthesis step of synthesizing carbon nanotubes on a support on which a catalyst is supported by flowing a source gas consisting of acetylene, carbon dioxide, and an inert gas over the support, wherein in the source gas, a partial pressure of the acetylene is 1.33×101 to 1.33×104 Pa, a partial pressure of the carbon dioxide is 1.33×101 to 1.33×104 Pa, and a partial pressure ratio of the acetylene to the carbon dioxide (acetylene/carbon dioxide) is in the range of 0.1 to 10.

Abstract: The present invention provides a carbon nanomaterial production apparatus 1 that includes a reaction tube 2 into which raw material gas and carrier gas are supplied and accordingly in which carbon nanomaterial is grown, a connection tube 4 that is connected to the reaction tube 2 and through which an aerosol-like mixture of the carbon nanomaterial and the carrier gas passes, and a collection tube 3 that is connected to the connection tube 4 and collects the carbon nanomaterial from the mixture. The collection tube 3 includes a discharge section 32 that is located above a junction 33 with the connection tube 4 and discharges the carrier gas contained in the mixture to outside, and a trapping section 31 that is located below the junction 33 with the connection tube 4 and traps the carbon nanomaterial that is separated from the mixture by gravitational sedimentation.

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 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.