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Development of low rank coals upgrading and their CWM producing technology; Teihin`itan kaishitsu ni yoru CWM seizo gijutsu

Abstract

A CWM manufacturing technology was developed by means of upgrading low rank coals. Even though some low rank coals have such advantages as low ash, low sulfur and high volatile matter content, many of them are merely used on a small scale in areas near the mine-mouths because of high moisture content, low calorification and high ignitability. Therefore, discussions were given on a coal fuel manufacturing technology by which coal will be irreversibly dehydrated with as much volatile matters as possible remaining in the coal, and the coal is made high-concentration CWM, thus the coal can be safely transported and stored. The technology uses a method to treat coal with hot water under high pressure and dry it with hot water. The method performs not only removal of water, but also irreversible dehydration without losing volatile matters by decomposing hydrophilic groups on surface and blocking micro pores with volatile matters in the coal (wax and tar). The upgrading effect was verified by processing coals in a pilot plant, which derived greater calorification and higher concentration CWM than with the conventional processes. A CWM combustion test proved lower NOx, lower SOx and higher combustion rate than for bituminous coal. The ash  More>>
Authors:
Sugiyama, T; [1]  Tsurui, M; Suto, Y; Asakura, M; [2]  Ogawa, J; Yui, M; Takano, S [3] 
  1. Center for Coal Utilization, Japan, Tokyo (Japan)
  2. JGC Corp., Tokyo (Japan)
  3. Japan COM Co. Ltd., Japan, Tokyo (Japan)
Publication Date:
Sep 01, 1996
Product Type:
Miscellaneous
Report Number:
ETDE/JP-98750585
Reference Number:
SCA: 013000; 010300; 015000; PA: JP-97:0K0404; EDB-98:071488; SN: 98001942570
Resource Relation:
Other Information: PBD: Sep 1996; Related Information: Is Part Of 6th Conference on Coal Utilization Technology; PB: 305 p.; Dai 6 kai sekitan riyo gijutsu kaigi koenshu
Subject:
01 COAL, LIGNITE, AND PEAT; COAL; COMMERCIALIZATION; WATER; FUEL SLURRIES; TECHNOLOGY IMPACTS; PROCEEDINGS; MANUFACTURING; COAL RANK; VOLATILE MATTER; WATER REMOVAL; HOT WATER; DRYING; PLUGGING; POROSITY; MICROSTRUCTURE; IRREVERSIBLE PROCESSES; CALORIFIC VALUE; TEXACO GASIFICATION PROCESS
OSTI ID:
623063
Research Organizations:
Center for Coal Utilization, Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE98750585; TRN: JN97K0404
Availability:
Available from Center for Coal Utilization, Japan, 3-4, Okubo 2-chome, Shinjuku-ku, Tokyo, (Japan); OSTI as DE98750585
Submitting Site:
NEDO
Size:
pp. 95-107
Announcement Date:

Citation Formats

Sugiyama, T, Tsurui, M, Suto, Y, Asakura, M, Ogawa, J, Yui, M, and Takano, S. Development of low rank coals upgrading and their CWM producing technology; Teihin`itan kaishitsu ni yoru CWM seizo gijutsu. Japan: N. p., 1996. Web.
Sugiyama, T, Tsurui, M, Suto, Y, Asakura, M, Ogawa, J, Yui, M, & Takano, S. Development of low rank coals upgrading and their CWM producing technology; Teihin`itan kaishitsu ni yoru CWM seizo gijutsu. Japan.
Sugiyama, T, Tsurui, M, Suto, Y, Asakura, M, Ogawa, J, Yui, M, and Takano, S. 1996. "Development of low rank coals upgrading and their CWM producing technology; Teihin`itan kaishitsu ni yoru CWM seizo gijutsu." Japan.
@misc{etde_623063,
title = {Development of low rank coals upgrading and their CWM producing technology; Teihin`itan kaishitsu ni yoru CWM seizo gijutsu}
author = {Sugiyama, T, Tsurui, M, Suto, Y, Asakura, M, Ogawa, J, Yui, M, and Takano, S}
abstractNote = {A CWM manufacturing technology was developed by means of upgrading low rank coals. Even though some low rank coals have such advantages as low ash, low sulfur and high volatile matter content, many of them are merely used on a small scale in areas near the mine-mouths because of high moisture content, low calorification and high ignitability. Therefore, discussions were given on a coal fuel manufacturing technology by which coal will be irreversibly dehydrated with as much volatile matters as possible remaining in the coal, and the coal is made high-concentration CWM, thus the coal can be safely transported and stored. The technology uses a method to treat coal with hot water under high pressure and dry it with hot water. The method performs not only removal of water, but also irreversible dehydration without losing volatile matters by decomposing hydrophilic groups on surface and blocking micro pores with volatile matters in the coal (wax and tar). The upgrading effect was verified by processing coals in a pilot plant, which derived greater calorification and higher concentration CWM than with the conventional processes. A CWM combustion test proved lower NOx, lower SOx and higher combustion rate than for bituminous coal. The ash content was also found lower. This process suits a Texaco-type gasification furnace. For a production scale of three million tons a year, the production cost is lower by 2 yen per 10 {sup 3} kcal than for heavy oil with the same sulfur content. 11 figs., 15 tabs.}
place = {Japan}
year = {1996}
month = {Sep}
}