The present disclosure relates to a method for the continuous production of carbon nanotubes, the method comprising: a mixture preparing step for mixing and stirring a solvent, a metal salt, a surfactant, a reducing agent, and a function improving agent to prepare an emulsion mixture; a gaseous mixture forming step for mixing the emulsion mixture with a carrier gas to form a gas phase mixture; and a reacting step for introducing the gas phase mixture into a heated reactor to form carbon nanotubes, wherein the diameter of the carbon nanotubes can be uniformly controlled, and the production yield of the carbon nanotubes can be increased.

The present disclosure is directed to methods for producing a single-walled carbon nanotube in a chemical vapor deposition (CVD) reactor. The methods comprise contacting liquid catalyst droplets and a carbon source in the reactor, and forming a single walled carbon nanotube at the surface of the liquid catalyst droplets.

The present disclosure is directed to methods for producing a single-walled carbon nanotube in a chemical vapor deposition (CVD) reactor. The methods comprise contacting liquid catalyst droplets and a carbon source in the reactor, and forming a single walled carbon nanotube at the surface of the liquid catalyst droplets.

Apparatus and method for plasma synthesis of carbon nanotubes couple a plasma nozzle to a reaction tube/chamber. A process gas comprising a carbon-containing species is supplied to the plasma nozzle. Radio frequency radiation is supplied to the process gas within the plasma nozzle, so as to sustain a plasma within the nozzle in use, and thereby cause cracking of the carbon-containing species. The plasma nozzle is arranged such that an afterglow of the plasma extends into the reaction tube/chamber. The cracked carbon-containing species also pass into the reaction tube/chamber. The cracked carbon-containing species recombine within the afterglow, so as to form carbon nanotubes in the presence of a catalyst.

Apparatus and method for plasma synthesis of carbon nanotubes couple a plasma nozzle to a reaction tube/chamber. A process gas comprising a carbon-containing species is supplied to the plasma nozzle. Radio frequency radiation is supplied to the process gas within the plasma nozzle, so as to sustain a plasma within the nozzle in use, and thereby cause cracking of the carbon-containing species. The plasma nozzle is arranged such that an afterglow of the plasma extends into the reaction tube/chamber. The cracked carbon-containing species also pass into the reaction tube/chamber. The cracked carbon-containing species recombine within the afterglow, so as to form carbon nanotubes in the presence of a catalyst.

A method and a device for preparing a carbon nanotube and a prepared carbon nanotube. The method includes: adding iron pentcarbonyl and nickel tetracarbonyl into a multi-stage series fluidized bed and performing decomposition to obtain a catalyst, and discharging the carbon monoxide generated; adding a carbon source and injecting an inert gas into the series fluidized bed for reaction under heating at 600-800 C. for 40-90 min, the ratio of the mass of carbon in the carbon source to the mass of the catalyst being 5-7:3-5. Further provided are a device for preparing a carbon nanotube according to the above method and a carbon nanotube prepared by the above method.

A method and a device for preparing a carbon nanotube and a prepared carbon nanotube. The method includes: adding iron pentcarbonyl and nickel tetracarbonyl into a multi-stage series fluidized bed and performing decomposition to obtain a catalyst, and discharging the carbon monoxide generated; adding a carbon source and injecting an inert gas into the series fluidized bed for reaction under heating at 600-800 C. for 40-90 min, the ratio of the mass of carbon in the carbon source to the mass of the catalyst being 5-7:3-5. Further provided are a device for preparing a carbon nanotube according to the above method and a carbon nanotube prepared by the above method.

A hydrogen production apparatus includes: a first furnace configured to heat a mixed gas of a raw material gas, which contains at least methane, and hydrogen to 1,000 C. or more and 2,000 C. or less; and a second furnace configured to accommodate a catalyst for accelerating a reaction of a first gas generated in the first furnace to a nanocarbon material, and to maintain the first gas at 500 C. or more and 1,200 C. or less.

A hydrogen production apparatus includes: a first furnace configured to heat a mixed gas of a raw material gas, which contains at least methane, and hydrogen to 1,000 C. or more and 2,000 C. or less; and a second furnace configured to accommodate a catalyst for accelerating a reaction of a first gas generated in the first furnace to a nanocarbon material, and to maintain the first gas at 500 C. or more and 1,200 C. or less.

The present invention relates to a method for the production of a carbon nanotube structure which has substantially aligned carbon nanotubes (CNTs) and to a temperature-controlled flow-through reactor.