Modeling changes of fractal pore structures in coal pyrolysis

被引：35

作者：

Chen, Yongli ^{[1
]}

Wang, Xiaoliang ^{[1
]}

He, Rong ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Thermal Engn, Beijing 100084, Peoples R China

来源：

FUEL | 2011年 / 90卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Coal; Pore; Pyrolysis; Fractal; X-RAY-SCATTERING; CHAR; EVOLUTION; DEVOLATILIZATION; TEMPERATURE; COMBUSTION; DIMENSIONS; PRESSURE; PROPERTY; BEHAVIOR;

D O I：

10.1016/j.fuel.2010.10.016

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：

Coal pyrolysis processes are numerically investigated in mathematically produced coal pore models which simulate real coal pores in the parameters of the porosity and fractal dimension. The simulations include FG-DVC chemical reaction model, gas molecular diffusion in pores, energy conservation model and coal swelling model. Numerical results are verified by experimental results qualitatively, and they revealed that both the porosity and volatile contents of the parent coal can affect the fractal dimension of the final char pores after pyrolysis linearly. A formula to predict the fractal dimension of char pores from its parent coal properties is obtained by curve fitting in numerous results. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：499 / 504

页数：6

共 36 条

[11] COMPARISON OF TAR EVOLUTION RATE PREDICTIONS IN COAL PYROLYSIS FROM THE MULTIPLE INDEPENDENT PARALLEL REACTION MODEL AND THE FUNCTIONAL-GROUP MODEL OVER A WIDE-RANGE OF HEATING RATES [J].

KO, GH ;

PETERS, WA ;

HOWARD, JB .

ENERGY & FUELS, 1988, 2 (04) :567-573

[12]

KO GH, 1988, P COMBUST INST, V22, P115

[13]

Kobayashi H., 1977, Proceedings of the Combustion Institute, V16, P411

[14] Characterization of solid residues from municipal solid waste incinerator [J].

Li, M ;

Xiang, J ;

Hu, S ;

Sun, LS ;

Su, S ;

Li, PS ;

Sun, XX .

FUEL, 2004, 83 (10) :1397-1405

[15] Fractal generation of char pores through random walk [J].

Liang, Zhanggang ;

He, Rong ;

Chen, Qun ;

Xu, Xuchang .

COMBUSTION SCIENCE AND TECHNOLOGY, 2007, 179 (03) :637-661

[16] Textural characterization of coals using fractal analysis [J].

Mahamud, M ;

López, O ;

Pis, JJ ;

Pajares, JA .

FUEL PROCESSING TECHNOLOGY, 2003, 81 (02) :127-142

[17] The physical character of coal char formed during rapid pyrolysis at high pressure [J].

Matsuoka, K ;

Akiho, H ;

Xu, WC ;

Gupta, R ;

Wall, TF ;

Tomita, A .

FUEL, 2005, 84 (01) :63-69

[18] Influence of fractal pores on the oxidation behavior of brown coal [J].

McMahon, PJ ;

Snook, IK ;

Moss, SD ;

Johnston, PR .

ENERGY & FUELS, 1999, 13 (05) :965-968

[19] Water adsorption and small angle X-ray scattering studies on the effect of coal thermal treatment [J].

Mitropoulos, AC ;

Haynes, JM ;

Richardson, RM ;

Steriotis, TA ;

Stubos, AK ;

Kanellopoulos, NK .

CARBON, 1996, 34 (06) :775-781

[20] A simple method for estimating f(E) and k0(E) in the distributed activation energy model [J].

Miura, K ;

Maki, T .

ENERGY & FUELS, 1998, 12 (05) :864-869

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