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Title: Fluidized bed selective pyrolysis of coal

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.

Inventors:
 [1];  [2];  [3]
  1. (McLean, VA)
  2. (Golden, CO)
  3. (Laramie, WY)
Issue Date:
Research Org.:
WESTERN RESEARCH INSTITUTE
OSTI Identifier:
868588
Patent Number(s):
5171406
Assignee:
Western Research Institute (Laramie, WY) NETL
DOE Contract Number:  
AC21-87MC24268
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
fluidized; bed; selective; pyrolysis; coal; discloses; process; comprises; effective; utilization; zonal; inclined; beds; zones; selectively; controlled; temperature; heating; rate; serves; dryer; crushed; additionally; pyrolyze; producing; substantially; carbon; dioxide; recycle; pyrolyzes; gaseous; liquid; char; products; designed; economically; integrate; product; mix; gas; recovered; effluent; stream; remains; treated; utilized; subsequent; step; heating rate; fluidized beds; controlled temperature; carbon dioxide; fluidized bed; liquid products; liquid product; selectively controlled; producing substantially; inclined fluidized; crushed coal; process step; subsequent process; effluent stream; gaseous effluent; selectively control; rate zones; product mix; /201/

Citation Formats

Shang, Jer Y., Cha, Chang Y., and Merriam, Norman W. Fluidized bed selective pyrolysis of coal. United States: N. p., 1992. Web.
Shang, Jer Y., Cha, Chang Y., & Merriam, Norman W. Fluidized bed selective pyrolysis of coal. United States.
Shang, Jer Y., Cha, Chang Y., and Merriam, Norman W. Wed . "Fluidized bed selective pyrolysis of coal". United States. https://www.osti.gov/servlets/purl/868588.
@article{osti_868588,
title = {Fluidized bed selective pyrolysis of coal},
author = {Shang, Jer Y. and Cha, Chang Y. and Merriam, Norman W.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

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