Experimental study of argon dilution effects on NO x emission in a non-premixed flame in comparison with nitrogen

Rangrazi, Abdolrasoul; Niazmand, Hamid; Heravi, H. M.

doi:10.1007/s11814-013-0088-6

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…H2O has a large thermal capacity ( 33.7 KJ / ( kmol * K ) ), and the mass-based enthalpy change between 300 and 2000 K for CO2 and N2 is approximately 50 % that of H2O [22]. Rangrazi et al's results [40] show that nitrogen and argon dilution reduces the combustion chamber temperature because of the enhancement in mass flow of the mixture and the heat required for its heating. Lentati et al [41] proved that the thermal cooling effects of H2O addition can influence the flame character more significantly, compared with the chemical effect.…”

Section: Physical Effects Of H2o Additionmentioning

confidence: 99%

The Chemical and Physical Effect of Diluent H2O on NO and CO Emissions in Computational CH4 / Air Laminar Diffusion Flames

Yang¹,

Zhang²,

Sun³

et al. 2019

dteees

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Section: Physical Effects Of H2o Additionmentioning

confidence: 99%

The Chemical and Physical Effect of Diluent H2O on NO and CO Emissions in Computational CH4 / Air Laminar Diffusion Flames

Yang¹,

Zhang²,

Sun³

et al. 2019

dteees

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“…When the fraction of CO 2 addition is up to 30%, the entire flame is almost blue which suggests little soot formation, Figure 2c. Rangrazi et al [26] experimentally investigated the effects of argon and nitrogen dilution on changing the color of a turbulent non-premixed flame. They concluded that the dilution increases the momentum flux and strengthen the mixing of fuel and air, and thus changes the flame color from yellow to blue due to more complete combustion.…”

Section: Flame Appearancementioning

confidence: 99%

Experimental investigation on soot formation in an ethylene/air laminar diffusion flame diluted with CO₂ at pressures up to 8 atm

et al. 2016

Env Prog and Sustain Energy

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The effects of CO2 addition to the fuel on the temperature field and soot formation in a co‐flow laminar diffusion flame of ethylene/air over the pressure range of 1 to 8 atm were investigated experimentally. The flame was produced in a high pressure combustion chamber. A technique of diffuse‐light two‐dimensional line‐of‐sight attenuation (diffuse 2D‐LOSA) was applied to measure soot volume fraction distribution in the flame. The influence of CO2 dilution on flame appearance at various pressures was investigated. The quantity of soot formation decreases with the increase in CO2 addition at all pressures, with the decrease rates being slower under higher pressure than lower pressure. With the addition of CO2 to fuel side, the sooting zone decreases and tends to be concentrated toward the tip of flame. Generally, the overall soot temperatures of the CO2 dilution flames decrease with increasing pressure and CO2 addition, the most significant change in the lower and middle of the flame. At same pressure, the CO2 addition has little impact on the flame height. As the pressure rises, however, the axial diameter of flame decreases to give an overall stretched appearance. © 2016 American Institute of Chemical Engineers Environ Prog, 36: 476–482, 2017

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“…More studies regarding the reduction of NO x emissions where inert gases such as CO 2 and N 2 were added to the fuel were conducted by Glarborg et al [8], Rangrazi et al [9], Devi et al [10] (combustion of biogas), and Salvador et al [11] (addition of N 2 ). These experiments revealed that the reaction of CO 2 with hydrocarbons could contribute to CO formation, which can lead to near-burner corrosion and slagging.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Inert Fuel Compounds on Flame Characteristics

et al. 2021

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To describe the effects of inert compounds in gaseous fuel, experiments on three different process burners (staged fuel burner, staged air burner, and low-calorific burner) were carried out. The tested burners are commercially available, but they were specially designed for experimental usage. Tests were carried out in the semi-industrial burner testing facility to investigate the influence of inert gases on the flame characteristics, emissions, and heat flux to the combustion chamber wall. Natural gas was used as a reference fuel, and, during all tests, thermal power of 500 kW was maintained. To simulate the combustion of alternative fuels with lower LHV, N2 and CO2 were used as diluents. The inert gas in the hydrocarbon fuel at certain conditions can lower NOx emissions (up to 80%) and increase heat flux (up to 5%). Once incombustible compounds are present in the fuel, the higher amount of fuel flowing through nozzles affects the flow in the combustion chamber by increasing the Reynolds number. This can change the flame pattern and temperature field, and it can be both positive and negative, depending on actual conditions.

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Experimental study of argon dilution effects on NO x emission in a non-premixed flame in comparison with nitrogen

Cited by 7 publications

References 16 publications

The Chemical and Physical Effect of Diluent H2O on NO and CO Emissions in Computational CH4 / Air Laminar Diffusion Flames

The Chemical and Physical Effect of Diluent H2O on NO and CO Emissions in Computational CH4 / Air Laminar Diffusion Flames

Experimental investigation on soot formation in an ethylene/air laminar diffusion flame diluted with CO₂ at pressures up to 8 atm

The Effect of Inert Fuel Compounds on Flame Characteristics

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Experimental study of argon dilution effects on NO x emission in a non-premixed flame in comparison with nitrogen

Cited by 7 publications

References 16 publications

The Chemical and Physical Effect of Diluent H2O on NO and CO Emissions in Computational CH4 / Air Laminar Diffusion Flames

The Chemical and Physical Effect of Diluent H2O on NO and CO Emissions in Computational CH4 / Air Laminar Diffusion Flames

Experimental investigation on soot formation in an ethylene/air laminar diffusion flame diluted with CO2 at pressures up to 8 atm

The Effect of Inert Fuel Compounds on Flame Characteristics

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Experimental investigation on soot formation in an ethylene/air laminar diffusion flame diluted with CO₂ at pressures up to 8 atm