Extraction of Taiheiyo coal with supercritical water-HCOOH mixture

被引：52

作者：

Adschiri, T ^{[1
]}

Sato, T ^{[1
]}

Shibuichi, H ^{[1
]}

Fang, Z ^{[1
]}

Okazaki, S ^{[1
]}

Arai, K ^{[1
]}

机构：

[1] Tohoku Univ, Dept Chem Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

FUEL | 2000年 / 79卷 / 3-4期

关键词：

supercritical water; coal conversion; formic acid;

D O I：

10.1016/S0016-2361(99)00158-1

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Taiheiyo coals were extracted with supercritical toluene (SC-toluene) (653 K, 20 MPa), supercritical water (SCW) (653 K, 35 MPa) and formic acid (HCOOH)-SCW mixed solvents (653 K, 35 MPa) using a semi-batch type system. The results clearly indicate that the coal conversion (= 1 - weight of residual coal (daf)/weight of loaded coal (daf)) and the liquid yield (= weight of liquid extracts/weight of loaded coal) in HCOOH-SCW were higher than those in SCW and SC-toluene. A considerable portion of coal is thus converted into light oils probably through hydrolysis and hydrogenation in HCOOH-SCW. We conducted another series of experiments for direct in situ observation of coal conversion in SCW and HCOOH-SCW using a diamond anvil cell (DAC). In HCOOH-SCW, the effective and rapid hydrogenation of coal with HCOOH occurs mainly at the early stage of the reaction. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：243 / 248

页数：6

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