A reduced mechanism for nitrogen chemistry in methane combustion

Glarborg, Peter; Lilleheie, Nils Inge; Byggstøyl, S.; Magnussen, Bjørn F.; Kilpinen, Pia; Hupa, Mikko

doi:10.1016/s0082-0784(06)80106-2

Cited by 51 publications

(39 citation statements)

References 8 publications

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“…In this paper, for simulating of chemical reaction the skeletal mechanism of Glarborg [19] is used that consists of 26 species and 77 reactions. In this mechanism, some of reactions and species have been removed compared to GRI-2.11 mechanism.…”

Section: Combustion Mechanismmentioning

confidence: 99%

The Effects of Combustion Parameters on Pollutant Emissions in a Porous Burner

Khiavi

2014

International Journal of Spray and Combustion Dynamics

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This paper reports a two-dimensional numerical prediction of premixed methane/air combustion in inert porous media. The two dimensional Navier-stokes equations, the two separate energy equations for solid and gas and conservation equations for chemical species are solved using finite volume method based on SIMPLE algorithm. The burner under study is a rectangular one with two different regions. First region is a preheating zone (low porosity matrix) that followed by the actual combustion region (high porosity matrix). For simulating the chemical reactions, skeletal mechanism (26 species and 77 reactions) is used. For studying the pollutant emissions in this porous burner, the effects of porous matrix properties, excess air ratio and inlet velocity are studied. The predicted gas temperature contour and pollutant formations are in good agreement with the available experimental data. The results indicate that the downstream of the burner should be constructed from materials with high conductivity, high convective heat transfer coefficient and high porosity in order to decrease the CO and NO emissions. Also, with increasing the inlet velocity of gas mixture and the excess air ratio, the pollutant emissions are decreased.

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Section: Combustion Mechanismmentioning

confidence: 99%

The Effects of Combustion Parameters on Pollutant Emissions in a Porous Burner

Khiavi

2014

International Journal of Spray and Combustion Dynamics

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“…The basic component of nitrogen oxide emissions in high-temperature processes is NO. Complex mechanisms of nitrogen oxide formation during coal combustion have been classified using the source of nitrogen and divided into two basic groups (Zeldowicz, 1946;Fenimore & Jones, 1957;Fenimore, 1971;Johnsson et al, 1992;Bowman, 1973;Sarofim & Pohl, 1973;de Soete, 1975;Malte & Pratt, 1977;Levy et al, 1978;Fenimore & Fraenkel, 1981;Heyd, 1982;Miller et al, 1984;Glarborg et al, 1986;Fong & Peters, 1986;Niksa, 1988;Cheng et al, 1989;Miller & Bowman, 1989;Muzio et al, 1990;Glarborg et al, 1992;Williams et al, 1992;Tomeczek & Gradoń, 1997;Williams et al, 1997):…”

Section: Mechanisms Of Nitrogen Oxide Formation During Coal Combustionmentioning

confidence: 99%

“…Kinetic constants of the above reactions are presented in scientific papers Miller & Bowman, 1989). A detailed review of the kinetic constants of thermal NOs formation are presented in the Ph.D. dissertation by Gradoń (2003), while the issues of the thermal mechanism are included in the papers by, among others: Fenimore, 1971;Johnsson et al, 1992;Bowman, 1973;Sarofim & Pohl, 1973;de Soete, 1975;Malte & Pratt, 1977;Fenimore & Fraenkel, 1981;Glarborg et al, 1986;Miller & Bowman, 1989;Muzio et al, 1990;Glarborg et al, 1992;Williams et al, 1992;Tomeczek & Gradoń, 1997.…”

Section: Zeldowicz Mechanismmentioning

confidence: 99%

Fuel-N Conversion to NO, N2O and N2 During Coal Combustion

Gil¹

2012

Fossil Fuel and the Environment

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“…[7][8][9] The separate global modeling of thermal and prompt NO has been used successfully as a post-processing code with CFD package to calculate NO x emission in laminar multi-flame burners for direct air heating 10) and in small industrial rapid heating furnaces.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, some of the schemes cannot be implemented in practice by the user due to the absence of some reaction rate constants 8,10) and should be employed with caution. Attempts have been made to create simple burner scaling criteria approximations 12,13) based on numerous experiments for laminar and turbulent jet combustion.…”

Section: Introductionmentioning

confidence: 99%

A Mathematical Modeling and Validation Study of NOx Emissions in Metal Processing Systems.

Malikov¹,

Lisienko²,

Malikov³

et al. 2002

ISIJ International

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The model is based on separate calculations of prompt and thermal NO x and is accomplished using CFD code for flow, temperature and concentration fields in the combustion system. Thermal NO x is calculated with the Zeldovich model. The prompt NO x is considered to be independent of residence time and is computed with detailed kinetic data based GRI-Mech version 2.11 and CHEMKIN code by assuming that every computational cell is a perfectly stirred reactor. Three main parameters are considered to be critical in NO x production: 1) air equivalence ratio, 2) temperature, and 3) mixture dilution with combustion products. All of these parameters and methane oxidation reaction rates are readily available in every cell of the CFD domain. Once NO x emission index is computed by GRI-Mech in every cell, NO x reaction rate is easily evaluated by multiplying it with the methane oxidation reaction rate. The NO x concentration field is then calculated using known CFD transport parameters. Comparison of model predictions with measurements is made for a wide range of industrial natural gas-fired burners installed in combustion chambers and furnaces. The flame temperatures were in the range of 1 400-2 100 K, velocities were in the range of 10-200 m/s, burner nozzles were in the range of diameters 5-550 mm, and the combustion chamber or furnace internal equivalent size in the range of 0.05-3.5 m. Good agreement has been obtained in most cases.

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A reduced mechanism for nitrogen chemistry in methane combustion

Cited by 51 publications

References 8 publications

The Effects of Combustion Parameters on Pollutant Emissions in a Porous Burner

The Effects of Combustion Parameters on Pollutant Emissions in a Porous Burner

Fuel-N Conversion to NO, N2O and N2 During Coal Combustion

A Mathematical Modeling and Validation Study of NOx Emissions in Metal Processing Systems.

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