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A method for the production of elemental carbon fibers and carbon particles uses highly uniform catalyst particles, preferably made by laser pyrolysis. Preferred catalyst particles include elemental iron, iron carbides or iron sulfides, generally with an average particle diameter from about 1000 nm

A method for the production of elemental carbon fibers and carbon particles uses highly uniform catalyst particles, preferably made by laser pyrolysis. Preferred catalyst particles include elemental iron, iron carbides or iron sulfides, generally with an average particle diameter from about 1000 nm to about 5 nm. Also, preferred catalyst particles have a narrow distribution in particle diameters as well as a cut off in particle size that the diameter distribution does not have a tail toward large diameters.

대표청구항

[ What is claimed is:] [18.] A method of producing elemental carbon comprising contacting catalyst particles with a carbon precursor gas, the catalyst particles comprising iron sulfide and having an average diameter from about 5 nm to about 1000 nm.

[ What is claimed is:] [18.] A method of producing elemental carbon comprising contacting catalyst particles with a carbon precursor gas, the catalyst particles comprising iron sulfide and having an average diameter from about 5 nm to about 1000 nm.