Process for production of value-added coproducts from coal and o

Details Process for production of value-added coproducts from coal and o Process for production of value-added coproducts from coal and o

1989-05-22

1993-08-03

Straub, Gary P.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

423445, 201 37, 208408, C01B 3104, C09C 148

Patent

active

052326799

ABSTRACT:
Coal is heated between about 95.degree. and 250.degree. C. to evaporate moisture, but not volatile hydrocarbons. The dried coal is heated to a temperature between about 400.degree. and 700.degree. C. to recover volatile hydrocarbons and to form char, the char is treated with hydrogen at a temperature between about 700.degree. and 1000.degree. C. to form methane, and the methane is decomposed to form pure carbon and hydrogen, which is recycled to treat the char.

REFERENCES:
patent: 3375175 (1968-03-01), Eddinger et al.
patent: 3773904 (1973-11-01), Iyengar et al.
patent: 3988236 (1976-10-01), Albright et al.
Steinberg, Coal Slurry Fuels Preparation and Utilization, 5/30/86, pp. 291-302.
Steinberg, Hydrogen Systems, 5/11/85, pp. 217-228.
Olsen, Unit Processes and Principles of Chemical Engineering, 1932, pp. 1-3.

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