A numerical study of the influence of ammonia addition on the auto-ignition limits of methane/air mixtures

被引：9

作者：

Van den Schoor, F. ^{[1
]}

Norman, F. ^{[1
]}

Vandebroek, L. ^{[1
]}

Verplaetsen, F. ^{[2
]}

Berghmans, J. ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept Mech Engn, B-3000 Louvain, Belgium

[2] Adinex NV, B-2200 Herentals, Belgium

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 164卷 / 2-3期

关键词：

Auto-ignition; Methane; Ammonia; NITROGEN-OXIDE; NITRIC-OXIDE; OXIDATION; NO; COMBUSTION; HYDROCARBONS; TEMPERATURES; CHEMISTRY; PRESSURE; HYDROGEN;

D O I：

10.1016/j.jhazmat.2008.09.025

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study the auto-ignition limit of ammonia/methane/air mixtures is calculated based upon a perfectly stirred reactor model with convective heat transfer. The results of four different reaction mechanisms are compared with existing experimental data at an initial temperature of 723 K with ammonia concentrations of 0-20 mol.% and methane concentrations of 2.5-10 mol.%. It is found that the calculation of the auto-ignition limit pressure at constant temperature leads to larger relative deviations between calculated and experimental results than the calculation of the auto-ignition temperature at constant pressure. In addition to the calculations, a reaction path analysis is performed to explain the observed lowering of the auto-ignition limit of methane/air mixtures by ammonia addition. It is found that this decrease is caused by the formation of NO and NO(2), which enhance the oxidation of methane at low temperatures. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1164 / 1170

页数：7

共 29 条

[1]

Amano T., 1998, Proceedings of the Combustion Institute, V27, P397

[2]

BARBE P, 1995, J CHIM PHYS PCB, V92, P1666, DOI 10.1051/jcp/1995921666

[3] Low temperature oxidation of methane: the influence of nitrogen oxides [J].

Bendtsen, AB ;

Glarborg, P ;

Dam-Johansen, K .

COMBUSTION SCIENCE AND TECHNOLOGY, 2000, 151 (01) :31-71

[4]

BROMLEY JH, 1992, P 24 S COMB COMB I, P1003

[5] Kinetic and thermodynamic sensitivity analysis of the NO-sensitised oxidation of methane [J].

Bromly, JH ;

Barnes, FJ ;

Muris, S ;

You, X ;

Haynes, BS .

COMBUSTION SCIENCE AND TECHNOLOGY, 1996, 115 (4-6) :259-296

[6] KINETICS AND MODELING OF THE H-2-O-2-NOX, SYSTEM [J].

BROMLY, JH ;

BARNES, FJ ;

NELSON, PF ;

HAYNES, BS .

INTERNATIONAL JOURNAL OF CHEMICAL KINETICS, 1995, 27 (12) :1165-1178

[7] A comparison of measured temperatures with those calculated numerically and analytically for an exothermic chemical reaction inside a spherical batch reactor with natural convection [J].

Campbell, A. N. ;

Cardoso, S. S. S. ;

Hayhurst, A. N. .

CHEMICAL ENGINEERING SCIENCE, 2007, 62 (11) :3068-3082

[8] Experimental study and detailed kinetic modeling of the effect of exhaust gas on fuel combustion: mutual sensitization of the oxidation of nitric oxide and methane over extended temperature and pressure ranges [J].

Dagaut, P ;

Nicolle, A .

COMBUSTION AND FLAME, 2005, 140 (03) :161-171

[9] Kinetic modeling of the interactions between NO and hydrocarbons in the oxidation of hydrocarbons at low temperatures [J].

Faravelli, T ;

Frassoldati, A ;

Ranzi, E .

COMBUSTION AND FLAME, 2003, 132 (1-2) :188-207

[10] Cool flames at terrestrial, partial, and near-zero gravity [J].

Foster, Michael ;

Pearlman, Howard .

COMBUSTION AND FLAME, 2006, 147 (1-2) :108-117

← 1 2 3 →