Supercritical water extraction of Taiheiyo coal

Masafumi Ajiri; Susumu Nagashima; Hiroshi Shibuichi; Masahiro Shishido; Kunio Arai

doi:10.3775/jie.75.742

Supercritical water extraction of Taiheiyo coal

Masafumi Ajiri, Susumu Nagashima, Hiroshi Shibuichi, Masahiro Shishido, Kunio Arai

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Supercritical water extraction of Japanese sub-bituminous (Taiheiyo) coal was conducted with semi-batch type reactor (380°C , 25-40 MPa) and the results were compared with that for supercritical toluene extraction (380°C , 15-30 MPa) . Higher coal conversion (55wt%) and liquid yield (45wt%) were obtained for supercritical water extraction, and this is found to be because of (1) the inhibition of polymerization or recombination of the primary products of thermal decomposition of coal and possibly due to the radical quenching with H or OH, and (2) the hydrolysis of ether or ester bond in coal.

Original language	English
Pages (from-to)	749-750
Number of pages	2
Journal	Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy
Volume	75
Issue number	8
DOIs	https://doi.org/10.3775/jie.75.742
Publication status	Published - 1996

Keywords

Coal liquefaction
Reaction mechanism
Supercritical toluene
Supercritical water

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10.3775/jie.75.742

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abstract = "Supercritical water extraction of Japanese sub-bituminous (Taiheiyo) coal was conducted with semi-batch type reactor (380°C , 25-40 MPa) and the results were compared with that for supercritical toluene extraction (380°C , 15-30 MPa) . Higher coal conversion (55wt%) and liquid yield (45wt%) were obtained for supercritical water extraction, and this is found to be because of (1) the inhibition of polymerization or recombination of the primary products of thermal decomposition of coal and possibly due to the radical quenching with H or OH, and (2) the hydrolysis of ether or ester bond in coal.",

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T1 - Supercritical water extraction of Taiheiyo coal

AU - Ajiri, Masafumi

AU - Nagashima, Susumu

AU - Shibuichi, Hiroshi

AU - Shishido, Masahiro

AU - Arai, Kunio

PY - 1996

Y1 - 1996

N2 - Supercritical water extraction of Japanese sub-bituminous (Taiheiyo) coal was conducted with semi-batch type reactor (380°C , 25-40 MPa) and the results were compared with that for supercritical toluene extraction (380°C , 15-30 MPa) . Higher coal conversion (55wt%) and liquid yield (45wt%) were obtained for supercritical water extraction, and this is found to be because of (1) the inhibition of polymerization or recombination of the primary products of thermal decomposition of coal and possibly due to the radical quenching with H or OH, and (2) the hydrolysis of ether or ester bond in coal.

AB - Supercritical water extraction of Japanese sub-bituminous (Taiheiyo) coal was conducted with semi-batch type reactor (380°C , 25-40 MPa) and the results were compared with that for supercritical toluene extraction (380°C , 15-30 MPa) . Higher coal conversion (55wt%) and liquid yield (45wt%) were obtained for supercritical water extraction, and this is found to be because of (1) the inhibition of polymerization or recombination of the primary products of thermal decomposition of coal and possibly due to the radical quenching with H or OH, and (2) the hydrolysis of ether or ester bond in coal.

KW - Coal liquefaction

KW - Reaction mechanism

KW - Supercritical toluene

KW - Supercritical water

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Supercritical water extraction of Taiheiyo coal

Abstract

Keywords

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