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Title: Decaking of coal or oil shale during pyrolysis in the presence of iron oxides

Abstract

A method for producing a fuel from the pyrolysis of coal or oil shale in the presence of iron oxide in an inert gas atmosphere. The method includes the steps of pulverizing feed coal or oil shale, pulverizing iron oxide, mixing the pulverized feed and iron oxide, and heating the mixture in a gas atmosphere which is substantially inert to the mixture so as to form a product fuel, which may be gaseous, liquid and/or solid. The method of the invention reduces the swelling of coals, such as bituminous coal and the like, which are otherwise known to swell during pyrolysis.

Inventors:
 [1]
  1. (Morgantown, WV)
Publication Date:
Research Org.:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
OSTI Identifier:
867208
Patent Number(s):
US 4886521
Assignee:
U.S. Department of Energy (Washington, DC) NETL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
decaking; coal; oil; shale; pyrolysis; presence; iron; oxides; method; producing; fuel; oxide; inert; gas; atmosphere; steps; pulverizing; feed; mixing; pulverized; heating; mixture; substantially; form; product; gaseous; liquid; solid; reduces; swelling; coals; bituminous; otherwise; swell; substantially inert; oil shale; inert gas; iron oxide; gas atmosphere; feed coal; iron oxides; pulverized feed; bituminous coal; /44/201/208/

Citation Formats

Khan, M. Rashid. Decaking of coal or oil shale during pyrolysis in the presence of iron oxides. United States: N. p., 1989. Web.
Khan, M. Rashid. Decaking of coal or oil shale during pyrolysis in the presence of iron oxides. United States.
Khan, M. Rashid. Sun . "Decaking of coal or oil shale during pyrolysis in the presence of iron oxides". United States. doi:. https://www.osti.gov/servlets/purl/867208.
@article{osti_867208,
title = {Decaking of coal or oil shale during pyrolysis in the presence of iron oxides},
author = {Khan, M. Rashid},
abstractNote = {A method for producing a fuel from the pyrolysis of coal or oil shale in the presence of iron oxide in an inert gas atmosphere. The method includes the steps of pulverizing feed coal or oil shale, pulverizing iron oxide, mixing the pulverized feed and iron oxide, and heating the mixture in a gas atmosphere which is substantially inert to the mixture so as to form a product fuel, which may be gaseous, liquid and/or solid. The method of the invention reduces the swelling of coals, such as bituminous coal and the like, which are otherwise known to swell during pyrolysis.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1989},
month = {Sun Jan 01 00:00:00 EST 1989}
}

Patent:

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  • This patent describes a method for producing a fuel from the pyrolysis of coal or oil shale. It comprises: pulverizing coal or oil shale, pulverizing iron oxide, subjecting the pulverized mixture to a mechanical load, and heating the mechanically loaded mixture to pyrolysis temperature in a gas atmosphere which is substantially inert to the mixture, so as to substantially prevent the mixture from swelling, to form a product fuel.
  • A method for producing a fuel from the pyrolysis of coal or oil shale in the presence of iron oxide in an inert gas atmosphere is described. The method includes the steps of pulverizing feed coal or oil shale, pulverizing iron oxide, mixing the pulverized feed and iron oxide, and heating the mixture in a gas atmosphere which is substantially inert to the mixture so as to form a product fuel, which may be gaseous, liquid and/or solid. The method of the invention reduces the swelling of coals, such as bituminous coal and the like, which are otherwise known tomore » swell during pyrolysis. 4 figs., 8 tabs.« less
  • A gasification method for the production of liquid and gaseous products from carbonaceous materials, is described consisting of the steps of heating at a rate in the range of about 5/sup 0/ to 50/sup 0/C per minute a particulate mixture consisting essentially of carbonaceous material selected from coal or oil shale in an average particle size range of about 8 to 100 mesh and about 5 to 25 wt.% of a calcium compound of an average particle size of less than about 325 mesh to a pyrolysis temperature in the range of about 450/sup 0/ to 700/sup 0/C, maintaining themore » mixture at a temperature within the range for a duration of about 10 to 60 minutes, and removing liquid and gaseous products generated during the pyrolysis of the carbonaceous material.« less
  • A coal pyrolysis technique or process is described in which particulate coal is pyrolyzed in the presence of about 5 to 21 wt. % of a calcium compound selected from calcium oxide, calcined (hydrate) dolomite, or calcined calcium hydrate to produce a high quality hydrocarbon liquid and a combustible product gas which are characterized by low sulfur content. The pyrolysis is achieved by heating the coal-calcium compound mixture at a relatively slow rate at a temperature of about 450.degree. to 700.degree. C. over a duration of about 10 to 60 minutes in a fixed or moving bed reactor. The gasmore » exhibits an increased yield in hydrogen and C.sub.1 -C.sub.8 hydrocarbons and a reduction in H.sub.2 S over gas obtainable by pyrolyzing cola without the calcium compound. The liquid product obtained is of a sufficient quality to permit its use directly as a fuel and has a reduced sulfur and oxygen content which inhibits polymerization during storage.« less
  • A coal pyrolysis technique or process is described in which particulate coal is pyrolyzed in the presence of about 5 to 21 wt % of a calcium compound selected from calcium oxide, calcined (hydrate) dolomite, or calcined calcium hydrate to produce a high quality hydrocarbon liquid and a combustible product gas which are characterized by low sulfur content. The pyrolysis is achieved by heating the coal-calcium compound mixture at a relatively slow rate at a temperature of about 450 to 700/sup 0/C over a duration of about 10 to 60 minutes in a fixed or moving bed reactor. The gasmore » exhibits an increased yield in hydrogen and C/sub 1/ to C/sub 8/ hydrocarbons and a reduction in H/sub 2/S over gas obtainable by pyrolyzing coal without the calcium compound. The liquid product obtained is of a sufficient quality to permit its use directly as a fuel and has a reduced sulfur and oxygen content which inhibits polymerization during storage.« less