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Title: Low-rank coal oil agglomeration product and process

Abstract

A selectively-sized, raw, low-rank coal is processed to produce a low ash and relative water-free agglomerate with an enhanced heating value and a hardness sufficient to produce a non-decrepitating, shippable fuel. The low-rank coal is treated, under high shear conditions, in the first stage to cause ash reduction and subsequent surface modification which is necessary to facilitate agglomerate formation. In the second stage the treated low-rank coal is contacted with bridging and binding oils under low shear conditions to produce agglomerates of selected size. The bridging and binding oils may be coal or petroleum derived. The process incorporates a thermal deoiling step whereby the bridging oil may be completely or partially recovered from the agglomerate; whereas, partial recovery of the bridging oil functions to leave as an agglomerate binder, the heavy constituents of the bridging oil. The recovered oil is suitable for recycling to the agglomeration step or can serve as a value-added product.

Inventors:
 [1];  [1];  [2];  [1];  [1]
  1. (Grand Forks, ND)
  2. (Plymouth, MN)
Publication Date:
Research Org.:
University of North Dakota
OSTI Identifier:
868530
Patent Number(s):
US 5162050
Assignee:
University of North Dakota School of Engineering & Mines Foundation (Grand Forks, ND) NETL
DOE Contract Number:  
FC21-86MC10637
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
low-rank; coal; oil; agglomeration; product; process; selectively-sized; raw; processed; produce; ash; relative; water-free; agglomerate; enhanced; heating; value; hardness; sufficient; non-decrepitating; shippable; fuel; treated; shear; conditions; stage; reduction; subsequent; surface; modification; facilitate; formation; contacted; bridging; binding; oils; agglomerates; selected; size; petroleum; derived; incorporates; thermal; deoiling; step; whereby; completely; partially; recovered; partial; recovery; functions; leave; binder; heavy; constituents; suitable; recycling; serve; value-added; heating value; coal oil; surface modification; selected size; low-rank coal; rank coal; ash reduction; oil agglomeration; bridging oil; enhanced heat; value-added product; process incorporates; /44/

Citation Formats

Knudson, Curtis L., Timpe, Ronald C., Potas, Todd A., DeWall, Raymond A., and Musich, Mark A. Low-rank coal oil agglomeration product and process. United States: N. p., 1992. Web.
Knudson, Curtis L., Timpe, Ronald C., Potas, Todd A., DeWall, Raymond A., & Musich, Mark A. Low-rank coal oil agglomeration product and process. United States.
Knudson, Curtis L., Timpe, Ronald C., Potas, Todd A., DeWall, Raymond A., and Musich, Mark A. Wed . "Low-rank coal oil agglomeration product and process". United States. https://www.osti.gov/servlets/purl/868530.
@article{osti_868530,
title = {Low-rank coal oil agglomeration product and process},
author = {Knudson, Curtis L. and Timpe, Ronald C. and Potas, Todd A. and DeWall, Raymond A. and Musich, Mark A.},
abstractNote = {A selectively-sized, raw, low-rank coal is processed to produce a low ash and relative water-free agglomerate with an enhanced heating value and a hardness sufficient to produce a non-decrepitating, shippable fuel. The low-rank coal is treated, under high shear conditions, in the first stage to cause ash reduction and subsequent surface modification which is necessary to facilitate agglomerate formation. In the second stage the treated low-rank coal is contacted with bridging and binding oils under low shear conditions to produce agglomerates of selected size. The bridging and binding oils may be coal or petroleum derived. The process incorporates a thermal deoiling step whereby the bridging oil may be completely or partially recovered from the agglomerate; whereas, partial recovery of the bridging oil functions to leave as an agglomerate binder, the heavy constituents of the bridging oil. The recovered oil is suitable for recycling to the agglomeration step or can serve as a value-added product.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

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