Conversion of brown coal in sub- and supercritical water at cyclic pressurization and depressurization

被引：27

作者：

Fedyaeva, O. N. ^{[1
]}

Vostrikov, A. A. ^{[1
]}

Shishkin, A. V. ^{[1
]}

Sokol, M. Ya. ^{[1
]}

Borisova, L. S. ^{[2
]}

Kashirtsev, V. A. ^{[2
]}

机构：

[1] Russian Acad Sci, Kutateladze Inst Thermophys, Siberian Branch, Novosibirsk, Russia

[2] Russian Acad Sci, Trofimuk Inst Petr Geol & Geophys, Siberian Branch, Novosibirsk, Russia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B | 2012年 / 6卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

supercritical water; brown coal; conversion; sulfur and oxygen removal; OXIDATION; PYROLYSIS;

D O I：

10.1134/S1990793111080069

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The conversion of brown coal in sub- and supercritical water at 310-460A degrees C and pressures up to 30 MPa in the cyclic pressurization and depressurization modes is studied. The temperature dependences of coal organic matter (COM) conversion and the yield of volatile and condensed products are obtained. The temperature dependence of the yield of condensed substances has a maximum at 370A degrees C. The fraction of high-molecular substances in condensed products is increased with increasing temperature. The cumulative conversion of COM into volatile and condensed products upon heating to 460A degrees C was 31.4 and 8.6%, respectively. According to the data of mass spectrometry analysis of volatile products and the elemental analysis of the initial coal, carbonaceous residue after the conversion, and condensed products, 82.3% of oxygen and 74.7% of sulfur, are removed from COM. CO2 and H2S are the main products of the conversion of oxygen- and sulfur-containing groups.

引用

页码：793 / 803

页数：11

共 42 条

[1]

Aleksandrov A. A., 2003, TABLES THERMOPHYSICA

[2]

Alekseenko S. V., 2003, IZV ROSS AKAD NAUK E, P52

[3]

[Anonymous], 1998, CHEM ENC

[4] A process for generating power from the oxidation of coal in supercritical water [J].

Bermejo, MD ;

Cocero, MJ ;

Fernández-Polanco, F .

FUEL, 2004, 83 (02) :195-204

[5]

Bogomolov A. I., 1984, MODERN METHODS PETRO

[6]

Bovan L. A., 2009, KHIM TVERD TOPL, P14

[7] MODIFICATION OF COAL BY SUBCRITICAL STEAM - AN EXAMINATION OF MODIFIED ILLINOIS NO 6 COAL [J].

BRANDES, SD ;

GRAFF, RA ;

GORBATY, ML ;

SISKIN, M .

ENERGY & FUELS, 1989, 3 (04) :494-498

[8] Pyrolysis of a low-rank coal in sub- and supercritical water [J].

Cheng, LM ;

Zhang, R ;

Bi, JC .

FUEL PROCESSING TECHNOLOGY, 2004, 85 (8-10) :921-932

[9] Temperature pyrolysis of brown coal and brown coal containing iron hydroxyl complexes [J].

Domazetis, George ;

Raoarun, Monthida ;

James, Bruce D. .

ENERGY & FUELS, 2006, 20 (05) :1997-2007

[10]

Eremin I. V., 1994, RANK COMPOSITION COA

← 1 2 3 4 5 →