Patent ID: 9714348
Date: 2017-07-25
CPC Classifications: B82Y,C01B,C01P,C09C

Claim:
1. A method for producing nanostructured carbon material, the method comprising: (a) combusting hydrocarbon fuel in an oxygen-enriched environment to produce combustion products having a temperature of 1,000-3,150° C.; (b) forming a postcombustion gas stream having a velocity of 40-800 m/s; (c) forming a working mixture by introducing hydrocarbon feedstock and a catalyst precursor for growth of carbon nanostructures into the postcombustion gas stream; (d) introducing the working mixture into a reaction zone, wherein the reaction zone is maintained at a temperature of 1000-2,300° C., and wherein the catalyst precursor is decomposed into catalyst particles, comprising at least some catalyst particles of 1 nm diameter having a graphene layer on their surface, while the hydrocarbon feedstock is decomposed to form the carbon nanostructures and gaseous products; and (e) separating the carbon nanostructures from the gaseous products of the decomposition of the hydrocarbon feedstock, wherein the carbon nanostructures include carbon nanotubes and carbon nanofibers.