The Effects of CO2, N2, and H2O Dilutions on NO Formation of Partially Premixed Synthesis Gas Combustion

Öztürk, Suat

doi:10.17776/csj.543130

Cited by 5 publications

(1 citation statement)

References 16 publications

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“…In contrast, for H 2 -rich syngas, the radiation effect is monotonic. Ozturk [13] studied the effects of CO 2 , N 2 , and H 2 O dilution on the adiabatic, turbulent, partially premixed combustion of synthesis gas and pointed out that increasing the dilution rates gradationally reduces the NO concentration and H 2 O has the best effect on reduction of NO emissions, followed by CO 2 and N 2 . Although these studies help fundamental understanding of the influence of diluents and dilution level on the combustion characteristics of hydrocarbon fuels, they were conducted for either fuel-side dilution or air-side dilution.…”

Section: Introductionmentioning

confidence: 99%

A Detailed Numerical Study of NOx Kinetics in Counterflow Methane Diffusion Flames: Effects of Fuel-Side versus Oxidizer-Side Dilution

Liu

Wang

et al. 2021

Journal of Combustion

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Dilution combustion has been widely utilized due to various merits, such as enhanced efficiency, fewer pollutants emissions, and even a promising future in alleviating global warming. Diluents can be introduced through the oxidizer or fuel side to achieve the desired combustion properties, and H2O and CO2 are the most common ones. A comprehensive comparison between the different dilution methods still lacks understanding and optimizes the dilution combustion technologies. This study numerically compared the effects of H2O and CO2 dilution in the oxidizer or fuel stream on counterflow methane diffusion flames, emphasizing NO formation kinetics. Results showed that the impact of different radiation heat transfer models on NO emissions diminishes with increasing the dilution ratio. The calculations of radiation heat transfer were treated in three ways: radiation-neglected, optically thin, and using a nongrey radiation model. When keeping the oxygen content and methane fraction constant, CO2 dilution in the air-side has the most profound influence on NO reduction, and CO2 dilution in the fuel-side has the least. H2O dilution showed a medium impact with a larger degree on air-side than that on fuel-side. To gain a deeper understanding of this effect order, the contributions of different NO formation routes were quantified, and analyses were made based on the diluents’ chemical and thermal effects. It was found that the oxidizer-side dilution and fuel-side dilution affect the NO formation pathway similarly. Still, the influence of H2O dilution on the NO formation pathway differs from that of CO2 dilution.

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Section: Introductionmentioning

confidence: 99%

A Detailed Numerical Study of NOx Kinetics in Counterflow Methane Diffusion Flames: Effects of Fuel-Side versus Oxidizer-Side Dilution

Liu

Wang

et al. 2021

Journal of Combustion

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Effect of N2 dilution on combustion instabilities and emissions in biogas flame

Yılmaz

Cam

Alabaş

2022

Fuel

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Experimental Investigation of Different Shale Gases in a Premixed Combustion Chamber

ÇETİNTAŞ

TAŞTAN²

2022

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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The negative consequences of global climate change have increased day by day in the world. For this reason, it has been revealed that people should use fuels that produce less emissions. The aim of the presented study is to determine the effects of shale gas components on emission characteristics and temperature distribution. In this study, combustion and emission behaviors of shale gas mixtures with different CH 4 / C 3 H 8 / CO 2 /N 2 contents were experimentally investigated. Emission and temperature measurements were performed at four different swirl numbers (0.2/0.6/1.0/1.4), at a thermal power of 4 kW and an equivalence ratio of 0.7. In the experiments, 6 different shale gas mixtures were used. As a result of this study, it has been seen that emission values vary greatly depending on the content of the shale gas. It has been also observed that all shale gases create more NO x , CO and CO 2 values than pure methane. C 3 H 8 value in the shale gas mixture caused an increase in NO x amount, axial temperature values and flue gas temperature. As the CO 2 content increased, the CO value increased, while the NO, axial temperature and flue gas temperature values decreased.

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The Effects of CO2, N2, and H2O Dilutions on NO Formation of Partially Premixed Synthesis Gas Combustion

Cited by 5 publications

References 16 publications

A Detailed Numerical Study of NOx Kinetics in Counterflow Methane Diffusion Flames: Effects of Fuel-Side versus Oxidizer-Side Dilution

A Detailed Numerical Study of NOx Kinetics in Counterflow Methane Diffusion Flames: Effects of Fuel-Side versus Oxidizer-Side Dilution

Effect of N2 dilution on combustion instabilities and emissions in biogas flame

Experimental Investigation of Different Shale Gases in a Premixed Combustion Chamber

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