The amounts of NOx and N2O formed in a fluidized bed combustor during the burning of coal volatiles and also of char

Hayhurst, A.N.; Lawrence, A.D.

doi:10.1016/0010-2180(95)00215-4

Cited by 108 publications

(77 citation statements)

References 14 publications

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“…The simulation were carried out for the different fuels properties the first one is the Methane fuel 4 CH , the second is the propane This fuel varies from in adiabatic temperature, molecular weight temperature distribution of the flame under Reynolds numbers of 8000 based on the fuel jet diameter. For this simulation the Reynolds number is that of the fuel jet.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Hayhurst and Lawrence [4] reported an experimental investigation of NOx emission in a fluidized bed combustor during burning of coal volatiles. Meunier and Carvalho [5] per-formed experimental and numerical investigations on NOx emissions from turbulent propane diffusion flames.…”

Section: Introductionmentioning

confidence: 99%

“…However, there is no more previous researches of the pollutants emission by impinging diffusion flame, the simulation was performed with different fuels 4 CH , 8 3 H C , 10 4 H C . Further, we will explore the relationship between pollutant emissions and different hydrocarbons components.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impinging Diffusion Flame and NO Production

Ghiti¹,

Bentebbiche²,

Hanchi³

2013

IJET

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Abstract-This paper reports a numerical investigation of an impinging diffusion flame on the pollutant emission for tree hydrocarbon fuels characteristics. The effects of the wall plate, the nozzle diameter, the Reynolds number on both thermal and prompt NO production. This work based on the Pre PDF simulation and K Epsilon models for study the reactive turbulent flow spreading on the lateral wall. We found that when the temperature increases the production of thermal NO increase, the NO production is more influenced by the hydrocarbon fuels.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impinging Diffusion Flame and NO Production

Ghiti¹,

Bentebbiche²,

Hanchi³

2013

IJET

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“…Similar to the earlier work (Krzywański et al, 2013), a system of 44 chemical reactions was considered in the model. Among them are homogeneous and heterogeneous reactions including char and volatile oxidation and formation/destruction of NO and N 2 O, as they were shown to be important during cocombustion process: Chen et al (2001), Desroches-Ducarne et al (1998), Furusawa et al (1982), Furusawa et al (1985), Gungor and Eskin (2008), Hayhurst and Lawrence (1996), Huilin et al (2000), Mukadi et al (2000), Saraiva et al (1993), Tomeczek (1992), Tomeczek and Gardoń (2003), Tsujimura et al (1983), Zhou et al (2011). For the purposes of this work, substantial modifications were made including changes in chemical kinetic equations, to make them capable to consider biomass and coal co-combustion.…”

Section: Reaction Modelmentioning

confidence: 99%

Model Research of Gas Emissions From Lignite and Biomass Co-Combustion in a Large Scale CFB Boiler

Krzywański¹,

Rajczyk²,

Nowak³

2014

Chemical and Process Engineering

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The paper is focused on the idea of a combustion modelling of a large-scale circulating fluidised bed boiler (CFB) during coal and biomass co-combustion. Numerical computation results for three solid biomass fuels co-combustion with lignite are presented in the paper. The results of the calculation showed that in previously established kinetics equations for coal combustion, some reactions had to be modified as the combustion conditions changed with the fuel blend composition. Obtained CO 2 , CO, SO 2 and NO x emissions are located in borders of ± 20% in the relationship to the experimental data. Experimental data was obtained for forest biomass, sunflower husk, willow and lignite cocombustion tests carried out on the atmospheric 261 MWe COMPACT CFB boiler operated in PGE Turow Power Station in Poland. The energy fraction of biomass in fuel blend was: 7% wt , 10% wt and 15% wt . The measured emissions of CO, SO 2 and NO x (i.e. NO + NO 2 ) were also shown in the paper. For all types of biomass added to the fuel blends the emission of the gaseous pollutants was lower than that for coal combustion.

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“…x Hayhurst and Lawrence [2] reported an experimental investigation on NO emission in a fluidized bed combustor x during burning of coal volatiles and concluded that low rank coal emits more NO than high rank coal. x Meunier and Carvalho [3] performed experimental and numerical investigations on the effect of jet Reynolds number on NO emission from turbulent propane diffusion x flame using laminar flamelet model with thermal and prompt mechanisms for NO formation.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Of Diluent Effect On NOx Emission In A X Turbulent Premixed Methane Flames

Subramani¹,

Ambedkar²,

Babu³

2008

Int. Jour. Appl. Bio-Eng.

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The stringent requirement to reduce the NO from various combustion devices while maintaining the combustor x performance is of paramount motivation for the current study. Partially premixing, fuel blends and fuel diluents represents promising approaches for reducing NO from flames. A detailed two dimensional, transient numerical study on the later aspect of fuel diluents x (helium) to reduce the NO emission in a back ward facing step geometry has been carried out using CFX 5.7. The equivalence ratio x has been varied from 0.85-1, to study the effect of excess air on NO emission. The methane flame is simulated using Eddy break-up x model with Zeldovich thermal mechanism for NO formation and the turbulence model is w-RSS (Reynolds Shear Stress). The x simulation results indicate that considerable reduction in NO emission and increase in flame stability can be achieved for a x predetermined addition of inert in to the fuel air mixture.

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The amounts of NOx and N2O formed in a fluidized bed combustor during the burning of coal volatiles and also of char

Cited by 108 publications

References 14 publications

Impinging Diffusion Flame and NO Production

Impinging Diffusion Flame and NO Production

Model Research of Gas Emissions From Lignite and Biomass Co-Combustion in a Large Scale CFB Boiler

Numerical Simulation Of Diluent Effect On NOx Emission In A X Turbulent Premixed Methane Flames

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