Coal gasification process

Details Coal gasification process Coal gasification process

1980-04-18

1982-01-26

Kratz, Peter F.

Gas: heating and illuminating

Processes

Fuel mixtures

48203, 48206, 48210, C10J 354

Patent

active

043126383

ABSTRACT:
A process for gasifying coal and other carbonacaeous matter is disclosed which produces fuel gas containing low concentrations of polycyclic aromatic hydrocarbons. In this process the polycyclic aromatic hydrocarbons released by the coal during devolatilization and formed during pyrolysis of volatile matter are decomposed thermally in the presence of hydrogen, at a sufficiently high partial pressure (obtained by increasing the total pressure in the gasifier) to prevent polymerization of free radicals formed during pyrolysis. A relationship between the temperature, the gas residence time in the gasification reactor, the hydrogen partial pressure (i.e., total pressure in the gasifier), and the coal feed conditions are specified to achieve "clean" coal gasification.

REFERENCES:
patent: 2577632 (1951-12-01), Roetheli
patent: 2884303 (1959-04-01), Metrailer
patent: 3847563 (1974-11-01), Archer et al.
patent: 3927996 (1975-12-01), Knudsen et al.

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