The characteristics of coal-char oxidation under high partial pressure of oxygen

被引：40

作者：

Hu, YQ ^{[1
]}

Nikzat, H ^{[1
]}

Nawata, M ^{[1
]}

Kobayashi, N ^{[1
]}

Hasatani, M ^{[1
]}

机构：

[1] Nagoya Univ, Dept Energy Engn & Sci, Nagoya, Aichi 4648603, Japan

来源：

FUEL | 2001年 / 80卷 / 14期

关键词：

pulse technique; char oxidation; high partial pressure of oxygen; kinetics;

D O I：

10.1016/S0016-2361(01)00086-2

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：

Pulse technique was proposed in this paper to study the characteristics of three kinds coal-char combustion with high partial pressure of oxygen under the temperature of 1273-1573 K to simulate the process of coal combustion with pure oxygen. Oxygen or the mixture of nitrogen and oxygen was taken as the pulse gas. An on-line gas chromatography with TCD was employed to detect the concentration of CO and CO, in the reacted pulse gas. Helium was used as both the carrier gas and reference gas in TCD. The results showed that the apparent reaction rate increased strongly as a function of oxygen concentration up to 100% under the operation pressure 0.18 MPa. The reaction orders for the three chars were all close to unity. The activation energies were about 20 kcal/mol in the temperature range of 1273-1573 K. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：2111 / 2116

页数：6

共 32 条

[1] KINETICS OF THERMAL DECOMPOSITION OF PULVERIZED COAL PARTICLES [J].

BADZIOCH, S ;

HAWKSLEY, PG .

INDUSTRIAL & ENGINEERING CHEMISTRY PROCESS DESIGN AND DEVELOPMENT, 1970, 9 (04) :521-&

[2] TRANSIENT METHOD AND ELEMENTARY STEPS IN HETEROGENEOUS CATALYSIS [J].

BENNETT, CO .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1976, 13 (02) :121-148

[3]

Carpenter AN, 1993, COAL COMBUSTION ANAL

[4]

Field M. A., 1967, COMBUSTION PULVERIZE, P186

[5] MEASUREMENTS OF EFFECT OF RANK ON COMBUSTION RATES OF PULVERIZED COAL [J].

FIELD, MA .

COMBUSTION AND FLAME, 1970, 14 (1-3) :237-&

[6]

GARAY PN, 1994, P 2 AM C EL POW, P280

[7] Does solid carbon burn in oxygen to give the gaseous intermediate CO or produce CO2 directly?: Some experiments in a hot bed of sand fluidized by air [J].

Hayhurst, AN ;

Parmar, MS .

CHEMICAL ENGINEERING SCIENCE, 1998, 53 (03) :427-438

[8] Estimation of kinetic rate parameters for coal combustion from measurements of the ignition temperature [J].

Hull, AS ;

Agarwal, PK .

FUEL, 1998, 77 (9-10) :1051-1058

[9]

LANAUZE RD, 1982, P INT S COMB COMB I, P1087

[10] Characteristics of entrained flow coal gasification in a drop tube reactor [J].

Lee, JG ;

Kim, JH ;

Lee, HJ ;

Park, TJ ;

Kim, SD .

FUEL, 1996, 75 (09) :1035-1042

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