Arc gasification of coal

Details Arc gasification of coal Arc gasification of coal

1979-12-03

1984-09-18

Kratz, Peter F.

Gas: heating and illuminating

Processes

Coal and water

44 1F, 48 65, 48210, 204170, 204173, 252373, C10J 346

Patent

active

044721722

ABSTRACT:
A process for the gasification of coal consisting essentially of forming a free-burning arc discharge between at least one anode and a cathode having a conical tip, wherein said arc discharge forms a contraction of the current-carrying area in the transition region in the vicinity of the cathode, forcefully projecting a reactive material consisting of a mixture of pulverized coal and steam parallel to the surface of said conical tip of said cathode and through said contraction of the current-carrying area in the transition region in the vicinity of the cathode, at such a rate that said mixture of pulverized coal and steam is exposed to the free-burning arc for less than 3 milli-seconds, and recovering a solid carbonaceous fume having a surface area equivalent to a particle size in the range of 0.01 to 0.2 microns and a gaseous product comprising of hydrogen, carbon monoxide and carbon dioxide. The carbonaceous fume is highly reactive and in a second steam treatment step is readily converted to gas at a rate of an order of magnitude higher than that for a conventionally devolatilized coal char.

REFERENCES:
patent: 1447259 (1923-03-01), McDonald
patent: 3288696 (1966-11-01), Orboch
patent: 3384467 (1968-05-01), Ammann et al.
patent: 4080550 (1978-03-01), Sheer et al.
The Sheer-Korman Arc Process, Sheer et al., 12-1975, Sheer-Korman Associates, Inc.
Sheer et al., "Arc Synthesis of Hydrocarbons", pp. 42-53 of Coal Gasification, Am. Chem. Soc. Advances in Chemistry Series, No. 131, 1974.
Groves et al., "Reactions of Coal in a Plasma Jet", I.S.E.C., Vol. 5, No. 1, Jan. 1966, pp. 59-62.

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