Fluidized bed selective pyrolysis of coal

Details Fluidized bed selective pyrolysis of coal Fluidized bed selective pyrolysis of coal

1990-10-17

1992-12-15

Woodard, Joye L.

Distillation: processes, thermolytic

Fluidized bed

201 29, 201 38, 201 44, C10B 4910

Patent

active

051714060

ABSTRACT:
The present invention discloses a process for the pyrolysis of coal which comprises the effective utilization of two zonal inclined fluidized beds, where said zones can be selectively controlled as to temperature and heating rate. The first zonal inclined fluidized bed serves as a dryer for crushed coal and additionally is controlled to selectively pyrolyze said coal producing substantially carbon dioxide for recycle use. The second zonal inclined fluidized bed further pyrolyzes the coal to gaseous, liquid and char products under controlled temperature and heating rate zones designed to economically integrate the product mix. The gas and liquid products are recovered from the gaseous effluent stream while the char which remains can be further treated or utilized in a subsequent process step.

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