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

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.

主权项

1. 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 nonatubes and H2 from the carbon source, the carbon nanotubes are synthesized on a support in a heated state, placed in a reactor, and simultaneously, the H2 is synthesized from the carbon source, the method comprising:
a synthesis step of flowing a source gas containing the carbon source over the support, on which the catalyst is supported, to synthesize the carbon nanotubes on the support and simultaneously synthesize the H2 in a gas flow, wherein a feed amount of the source gas in the synthesis step is 0.01 to 100 m3/s per m3 of a reactor volume a separation step of flowing a separation gas over the support, on which the carbon nanotubes are synthesized, to separate the carbon nanotubes from the support into the separation gas; a removal step of flowing an oxidizing gas over the support after the carbon nanotubes are separated, to oxidize and remove carbon remaining on the support; a catalyst resupport step of flowing a source gas of the catalyst over the support after the removal step; and a catalyst carrier resupport step of a catalyst carrier of flowing a source gas of the catalyst carrier over the support after the removal step and prior to the catalyst resupport step, wherein the steps in the method for simultaneously producing carbon nanotubes and hydrogen are repeatedly performed by switching the gases fed to the reactor, with the support kept in the heated state.