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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.

Inventors:
 [1];  [2];  [3]
  1. (Bethel Park, PA)
  2. (McMurray, PA)
  3. (Herminie, PA)
Issue Date:
Research Org.:
Pittsburgh Energy Technology Center
OSTI Identifier:
866729
Patent Number(s):
4775387
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
sulfur; removal; comminution; carbonaceous; material; finely; divided; clean; coal; provided; forming; slurry; coarse; aqueous; alkali; solution; heating; pressure; critical; conditions; steam; supercritical; fluid; penetrates; trapped; porosity; swells; thermoplastic; condition; elevated; temperature; sudden; explosive; release; fractured; particles; sulfur-containing; gases; minerals; recovered; product; aqueous alkali; coal product; containing gases; supercritical fluid; elevated temperature; carbonaceous material; finely divided; containing gas; sulfur-containing gases; sulfur removal; alkali solution; sulfur-containing gas; clean coal; coarse coal; divided coal; /44/209/

Citation Formats

Narain, Nand K., Ruether, John A., and Smith, Dennis N. Sulfur removal and comminution of carbonaceous material. United States: N. p., 1988. Web.
Narain, Nand K., Ruether, John A., & Smith, Dennis N. Sulfur removal and comminution of carbonaceous material. United States.
Narain, Nand K., Ruether, John A., and Smith, Dennis N. Fri . "Sulfur removal and comminution of carbonaceous material". United States. https://www.osti.gov/servlets/purl/866729.
@article{osti_866729,
title = {Sulfur removal and comminution of carbonaceous material},
author = {Narain, Nand K. and Ruether, John A. and Smith, Dennis 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

Patent:

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