Method of producing vapor grown carbon fibers using coal

Details Method of producing vapor grown carbon fibers using coal Method of producing vapor grown carbon fibers using coal

1995-09-11

1998-12-08

Lewis, Michael

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

D01F 912

Patent

active

058465090

ABSTRACT:
A method of producing vapor grown carbon fibers is provided in which coal is utilized as a source of an iron catalyst, as a source of hydrocarbon and sulfur, or both. The method includes the steps of introducing pulverized coal into a furnace containing a gas selected from the group consisting of hydrogen, hydrocarbon, nitrogen, ammonia, helium, or mixtures thereof, and maintaining the gas at a temperature from about 1000.degree.-1175.degree. C. to form the fibers. The coal has a sulfur content of from 1 to 6% by weight and may comprise high volatile bituminous coal. The use of coal to produce vapor grown carbon fibers provides a significant cost advantage over other starting materials and also provides an environmentally safe use for high sulfur content coal.

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Tibbetts et al, "Effect of Sulfur on the Production of Carbon Fibers in the Vapor Phase", American Carbon Society, Buffalo, NY, Jun. 13, 1993.
Clausen et al, "Synthesis and Properties of Millimeter Wave Screening Materials from JP-8 Fuel", Smoke Obscurants Symposium XVIII, Aug. 23-26, 1994.

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