Patent ID: 6290753
Filing Date: 2001-09-18
Classification: B82Y,C01B,F17C,Y02E,Y10S

Abstract:
A method for storing hydrogen in a carbon material comprising turbostratic microstructures of elemental carbon, said microstructures including cones, the cone angles of which being multiples of 60.degree.,said method comprising steps fora) introducing said carbon material in a reaction vessel,b) evacuating said reaction vessel to a pressure less than 10.sup.-6 torr by keeping the carbon material at a temperature in the range of 295 K to 800 K,c) introducing pure hydrogen gas in the evacuated reaction vessel to expose the carbon material to said pure hydrogen gas at a pressure in the range of 300 torr to 7600 torr,d) allowing said pure hydrogen gas to be absorbed into said microstructures of said carbon material, ande) leaving said reaction vessel at ambient temperature, typically 295 K or slightly below, the material contained therein being under a fixed hydrogen gas pressure within said pressure range, the hydrogen as required being released as a gas from said carbon material at said ambient temperature or by heating said carbon material in said reaction vessel.