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Title: Fluidized bed selective pyrolysis of coal

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 pyrolyses 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. 9 figs.
Authors:
; ;
Publication Date:
OSTI Identifier:
7279618
Report Number(s):
US 5171406; A
PPN: US 7-599322
DOE Contract Number:
AC21-87MC24268
Resource Type:
Patent
Resource Relation:
Patent File Date: 17 Oct 1990
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; CHARS; SYNTHESIS; COAL; PYROLYSIS; COAL GAS; COAL LIQUIDS; CHEMICAL REACTORS; PROCESS CONTROL; TEMPERATURE CONTROL; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; CONTROL; DECOMPOSITION; ENERGY SOURCES; FLUIDS; FOSSIL FUELS; FUELS; GASES; LIQUIDS; MATERIALS; PYROLYSIS PRODUCTS; THERMOCHEMICAL PROCESSES 010409* -- Coal, Lignite, & Peat-- Pyrolysis & Carbonization-- (1987-)