Oxygen temperature variation of a non-premixed oxy-methane flame in a lab-scale slot burner

Oh, Jeongseog; Hong, Sungkook

doi:10.1016/j.applthermaleng.2016.05.112

Cited by 3 publications

(2 citation statements)

References 48 publications

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“…However, CO 2rich flue gas is required to increase the efficiency and economy during carbon capture and storage. Several new advanced combustion technologies that use O 2 /CO 2 as an oxidizer, such as oxy-fuel combustion technology (Buhre et al, 2005;Wall, 2007;Hjärtstam et al, 2009;Rathnam et al, 2009;Scheffknecht et al, 2011;Taniguchi et al, 2011;Chen et al, 2012;Dhaneswar and Pisupati, 2012;Luo et al, 2015;Moroń and Rybak, 2015;Liu et al, 2016;Ge et al, 2017;Seddighi, 2017;Menage et al, 2018;Zhang et al, 2018), moderate or intense low-oxygen dilution (MILD) oxy-combustion (Li et al, 2013;Tu et al, 2015;Mardani and FazlollahiGhomshi, 2016;Mao et al, 2017;Gładysz et al, 2018), gaseous fuel-fired oxy-fuel combustion technology (Yin et al, 2011;Seepana and Jayanti, 2012a;Seepana and Jayanti, 2012b;Oh et al, 2013a;Oh et al, 2013b;Oh and Noh, 2014;Giménez-López et al, 2015;Oh and Noh, 2015;Oh and Hong, 2016;Bürkle et al, 2018), and high-temperature oxygen combustion technology (Li et al, 2014;Li et al, 2015;Li et al, 2016), have been developed to meet this requirement. However, many other challenges must be solved before these combustion technologies can be widely adopted in the industry, since the differences in the physical properties and chemical characteristics of CO 2 and N 2 can lead to important distinctions in flame structure.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on the Combustion Characteristics of a Laminar Non-Premixed Methane Jet Flame in Oxygen/Carbon Dioxide Coflow

Zhang

Xie

et al. 2022

Front. Energy Res.

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The combustion characteristics of laminar non-premixed CH4 jet flame in an O2/CO2 coflows with different oxygen mole fractions were studied experimentally. The flame heights at different oxygen concentrations and fuel jet velocity were obtained. The experimental observation shows that the luminosity of the CH4 jet flame in O2/CO2 coflow is different from that of the flame in air stream. A two-dimensional numerical study of a laminar non-premixed CH4 jet flame in the O2/CO2 coflow with the O2 mole fraction of 0.35 was conducted to analyze the effects of CO2 dilution on the flame. The distribution of OH radicals in the flame was measured experimentally using planar laser-induced fluorescence (PLIF) to validate the computational method adopted in this work, and the computational and experimental results of the OH distributions showed good consistency at various fuel flow velocities. Three artificial species were created in the numerical experiment to analyze the effects of the chemical reactions, third-body collisions, and transport properties of CO2 on the height, width, and temperature distribution of the flame. The results showed that CO2 participation in chemical reactions exerts significant effects on the flame. However, the influences of the third-body effects and transport properties of CO2 on the jet flame are unremarkable. The global reaction pathways and distributions of important species in the laminar non-premixed CH4 jet flame were analyzed in detail to investigate the influence mechanisms of CO2 on the flame height and temperature. The entire flame can be divided into two oxidation parts, which separated by the boundary of the HCCO. The H, O, and OH concentrations and distributions in different parts of the flame were influenced by CO2 dilution, resulting in different flame heights and temperature distributions.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on the Combustion Characteristics of a Laminar Non-Premixed Methane Jet Flame in Oxygen/Carbon Dioxide Coflow

Zhang

Xie

et al. 2022

Front. Energy Res.

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“…Using pure oxygen as the oxidizer would significantly reduce NO x emissions [24], which have many environmental hazards. Besides, capturing CO 2 is easier in methane/oxygen combustions than which uses air as oxidizer [25,26].…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of non-premixed and premixed rotational tubular flame: a study of flame structure and instability

Bordbar

Motaghian

Pasdarshahri

2019

J Braz. Soc. Mech. Sci. Eng.

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Tubular flames are considered due to their advantages in the geometry of the flame. The major importance of tubular flame which makes it different from other flames is its uniform temperature distribution. Therefore, it reduces the possibility of the formation of thermal fluctuations and hot spots along the furnaces. In this paper, high-speed, non-premixed and premixed tubular flames are numerically investigated using computational fluid dynamics under various operational conditions. Methane/air and CO 2-diluted methane/oxygen combustions are considered in both non-premixed and premixed modes. k − SST model, eddy dissipation concept combustion model, and P1 radiation model have been used as numerical models. Numerical results are validated against available experimental measurements in the non-premixed tubular flame using DRM22 kinetic mechanism for methane/air combustions and GRI-Mech 3.0 for methane/oxygen mixtures. The structure of the tubular flame in the combustion chamber and stability limits of tubular flame in terms of operating conditions have been studied in the present paper. Results show that premixed tubular flames establish more uniform radial temperature distribution and wider stable flame operating conditions. In addition, diluted methane/oxygen tubular flames have been shown broader stable condition limits than methane/air flames.

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Spectral Radiation Analysis of Premixed Oxy-Methane Flames

Chowdhury

Afrose

Love

2019

Journal of Heat Transfer

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For a hydrocarbon burning with oxygen, the resulting exhaust stream is composed mainly of carbon dioxide and water vapor. This exhaust allows for easier carbon capture and sequestration since the water can be condensed out. Another advantage is the significant reduction of NOx since much of the nitrogen found in air-fired systems is eliminated. Although beneficial, many of the exhaust gas products' radiative heat transfer characteristics are unknown. Motivated by this, this paper focuses on the spectral radiation measurement of premixed oxy-methane combustion flames. This is important for combustion system designers since radiative heat from the flame is significant for oxy-flames. This study is conducted by varying equivalence ratio, firing input, and CO2 recirculation ratio. The spectral radiation of premixed oxy-methane flames is collected from 1.2 μm to 5 μm wavelengths. During the experimental study, it is found that the water vapor emits at 1.4 μm, 1.85 μm, and 2.5 μm wavelengths. A short band of carbon dioxide emission is detected at 1.96 μm. Three other carbon dioxide radiation maxima are observed at the proximity of 2.71 μm, 2.85 μm, and 4.38 μm. The study revealed that the spectral intensity of CO2 and H2O for oxy-methane combustion increases almost five times compared to the air-methane combustion at stochiometric condition. It is also found that the spectral intensity decreases as the equivalence ratio increases. The spectral radiative emission intensity increases as the firing input increases. Another observation includes the fact that spectral intensity increases up to five times when 60% CO2 is recirculated as a diluent in the flame.

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Oxygen temperature variation of a non-premixed oxy-methane flame in a lab-scale slot burner

Cited by 3 publications

References 48 publications

Experimental and Numerical Study on the Combustion Characteristics of a Laminar Non-Premixed Methane Jet Flame in Oxygen/Carbon Dioxide Coflow

Experimental and Numerical Study on the Combustion Characteristics of a Laminar Non-Premixed Methane Jet Flame in Oxygen/Carbon Dioxide Coflow

Numerical investigation of non-premixed and premixed rotational tubular flame: a study of flame structure and instability

Spectral Radiation Analysis of Premixed Oxy-Methane Flames

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