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Title: Sulfur removal and comminution of carbonaceous material

Abstract

Finely divided, clean coal or other carbonaceous material is provided by forming a slurry of coarse coal in aqueous alkali solution and heating the slurry under pressure to above the critical conditions of steam. The supercritical fluid penetrates and is trapped in the porosity of the coal as it swells in a thermoplastic condition at elevated temperature. By a sudden, explosive release of pressure the coal is fractured into finely divided particles with release of sulfur-containing gases and minerals. The finely divided coal is recovered from the minerals for use as a clean coal product. 2 figs.

Inventors:
; ;
Issue Date:
Research Org.:
USDOE Pittsburgh Energy Technology Center, PA
OSTI Identifier:
6316021
Patent Number(s):
-US-A7105166
Application Number:
ON: DE89011783
Assignee:
Dept. of Energy TIC; ERA-14-027789; EDB-89-075606
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL; COMMINUTION; SULFUR; REMOVAL; CARBONACEOUS MATERIALS; INVENTIONS; POTASSIUM HYDROXIDES; SLURRIES; SODIUM HYDROXIDES; STEAM; SUPERCRITICAL STATE; SWELLING; ALKALI METAL COMPOUNDS; DISPERSIONS; ELEMENTS; ENERGY SOURCES; FOSSIL FUELS; FUELS; HYDROGEN COMPOUNDS; HYDROXIDES; MATERIALS; MIXTURES; NONMETALS; OXYGEN COMPOUNDS; POTASSIUM COMPOUNDS; SODIUM COMPOUNDS; SUSPENSIONS; 010300* - Coal, Lignite, & Peat- Preparation- (1987-)

Citation Formats

Narain, N.K., Ruether, J.A., and Smith, D.N. Sulfur removal and comminution of carbonaceous material. United States: N. p., 1987. Web.
Narain, N.K., Ruether, J.A., & Smith, D.N. Sulfur removal and comminution of carbonaceous material. United States.
Narain, N.K., Ruether, J.A., and Smith, D.N. Wed . "Sulfur removal and comminution of carbonaceous material". United States.
@article{osti_6316021,
title = {Sulfur removal and comminution of carbonaceous material},
author = {Narain, N.K. and Ruether, J.A. and Smith, D.N.},
abstractNote = {Finely divided, clean coal or other carbonaceous material is provided by forming a slurry of coarse coal in aqueous alkali solution and heating the slurry under pressure to above the critical conditions of steam. The supercritical fluid penetrates and is trapped in the porosity of the coal as it swells in a thermoplastic condition at elevated temperature. By a sudden, explosive release of pressure the coal is fractured into finely divided particles with release of sulfur-containing gases and minerals. The finely divided coal is recovered from the minerals for use as a clean coal product. 2 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {10}
}