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Title: Liquefaction of calcium-containing subbituminous coals and coals of lower rank

Abstract

A process for the treatment of a calcium-containing subbituminous coal and coals of lower rank to form insoluble, thermally stable calcium salts which remain within the solids portions of the residue on liquefaction of the coal, thereby suppressing the formation scale, made up largely of calcium carbonate deposits, e.g., vaterite, which normally forms within the coal liquefaction reactor (i.e., coal liquefaction zone), e.g., on reactor surfaces, lines, auxiliary equipment and the like. A solution of a compound or salt characterized by the formula MX, where M is a Group IA metal of the Periodic Table of the Elements, and X is an anion which is capable of forming water-insoluble, thermally stable calcium compounds, is maintained in contact with a particulate coal feed sufficient to impregnate said salt or compound into the pores of the coal. On separation of the impregnated particulate coal from the solution, the coal can be liquefied in a coal liquefaction reactor (reaction zone) at coal liquefaction conditions without significant formation of vaterite or other forms of calcium carbonate on reactor surfaces, auxiliary equipment and the like; and the Group IA metal which remains within the liquefaction bottoms catalyzes the reaction when the liquefaction bottoms are subjectedmore » to a gasification reaction.« less

Inventors:
 [1];  [2]
  1. (Sanwood, NJ)
  2. (Seabrook, TX)
Issue Date:
OSTI Identifier:
863681
Patent Number(s):
4227989
Assignee:
Exxon Research & Engineering Co. (Florham Park, NJ) OSTI
DOE Contract Number:  
E(49-18)-2353
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
liquefaction; calcium-containing; subbituminous; coals; rank; process; treatment; coal; form; insoluble; thermally; stable; calcium; salts; remain; solids; portions; residue; suppressing; formation; scale; carbonate; deposits; vaterite; normally; forms; reactor; zone; surfaces; lines; auxiliary; equipment; solution; compound; salt; characterized; formula; mx; ia; metal; periodic; table; elements; anion; capable; forming; water-insoluble; compounds; maintained; contact; particulate; feed; sufficient; impregnate; pores; separation; impregnated; liquefied; reaction; conditions; significant; remains; bottoms; catalyzes; subjected; gasification; calcium salts; auxiliary equipment; gasification reaction; coal feed; liquefaction zone; coal liquefaction; reaction zone; calcium carbonate; thermally stable; particulate coal; periodic table; liquefaction reactor; calcium compound; subbituminous coals; stable calcium; subbituminous coal; reactor surfaces; formula mx; calcium-containing subbituminous; form insoluble; liquefaction conditions; calcium compounds; bituminous coal; bituminous coals; /208/44/

Citation Formats

Gorbaty, Martin L., and Taunton, John W. Liquefaction of calcium-containing subbituminous coals and coals of lower rank. United States: N. p., 1980. Web.
Gorbaty, Martin L., & Taunton, John W. Liquefaction of calcium-containing subbituminous coals and coals of lower rank. United States.
Gorbaty, Martin L., and Taunton, John W. Tue . "Liquefaction of calcium-containing subbituminous coals and coals of lower rank". United States. https://www.osti.gov/servlets/purl/863681.
@article{osti_863681,
title = {Liquefaction of calcium-containing subbituminous coals and coals of lower rank},
author = {Gorbaty, Martin L. and Taunton, John W.},
abstractNote = {A process for the treatment of a calcium-containing subbituminous coal and coals of lower rank to form insoluble, thermally stable calcium salts which remain within the solids portions of the residue on liquefaction of the coal, thereby suppressing the formation scale, made up largely of calcium carbonate deposits, e.g., vaterite, which normally forms within the coal liquefaction reactor (i.e., coal liquefaction zone), e.g., on reactor surfaces, lines, auxiliary equipment and the like. A solution of a compound or salt characterized by the formula MX, where M is a Group IA metal of the Periodic Table of the Elements, and X is an anion which is capable of forming water-insoluble, thermally stable calcium compounds, is maintained in contact with a particulate coal feed sufficient to impregnate said salt or compound into the pores of the coal. On separation of the impregnated particulate coal from the solution, the coal can be liquefied in a coal liquefaction reactor (reaction zone) at coal liquefaction conditions without significant formation of vaterite or other forms of calcium carbonate on reactor surfaces, auxiliary equipment and the like; and the Group IA metal which remains within the liquefaction bottoms catalyzes the reaction when the liquefaction bottoms are subjected to a gasification reaction.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

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