Experimental investigation of the pressure influence on flame structure of fuel-rich oxy-fuel methane flames for synthesis gas production

Sentko, M.; Schulz, Sebastian; Stelzner, Björn; Anderlohr, C.; Vicari, M.; Trimis, D.

doi:10.1016/j.fuel.2020.119377

Cited by 9 publications

(6 citation statements)

References 41 publications

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“…A modified Agilent GC (7890B)/MS (5977B), similar to the one described by Sentko et al [25], was used in this study. A thermal conductivity detector (TCD) and two flame ionization detectors (FID) were used for quantifying the stable gases (CO, CO 2 , O 2 , H 2 and H 2 O) and hydrocarbons (HC), respectively.…”

Section: Gcmentioning

confidence: 99%

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Experimental Characterization of Flame Structure and Soot Volume Fraction of Premixed Kerosene Jet A-1 and Surrogate Flames

et al. 2021

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Modeling the chemical reactions and soot processes in kerosene flames is important to support the design of future generations of low-emission aircraft engines. To develop and validate these models, detailed experimental data from model flames with well-defined boundary conditions are needed. Currently, only few data from experiments with real aircraft engine fuels are available. This paper presents measurements of temperature, species and soot volume fraction profiles in premixed, flat flames using Jet A-1 kerosene and a two-component surrogate blend. Measurements were performed using a combination of TDLAS, GC and laser extinction. The results show that the flame structure in terms of temperature and species profiles of the kerosene and surrogate flames are very similar but differ greatly in the resulting soot volume fractions. Furthermore, the study shows that the available chemical mechanisms can correctly predict the temperature profiles of the flames but show significant differences from the experimentally observed species profiles. The differences in the sooting tendency of the kerosene and the surrogate are further investigated using detailed chemical mechanisms.

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Section: Gcmentioning

confidence: 99%

“…A total of 15 storage loops enabled sampling at different heights above the burner (HAB) of a flame. The probe as well as the sampling system and analyzing routines are described in more detail in [25].…”

Section: Gcmentioning

confidence: 99%

Experimental Characterization of Flame Structure and Soot Volume Fraction of Premixed Kerosene Jet A-1 and Surrogate Flames

et al. 2021

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“…Tunable diode laser absorption spectroscopy (TDLAS) is an optical noninvasive and calibration-free measurement technique, which was used to determine the temperature and H 2 O concentration profiles. The principle of TDLAS is summarized by, e.g., Goldenstein et al [9] and Bolshov et al [10], and the setup and analyzing procedures are described by Sentko et al [8,11]. Additionally, invasive gas sampling using a quartz probe, including a subsequent analysis via gas chromatography, was used to determine major combustion species.…”

Section: Pox Burner Setup and Experimental Resultsmentioning

confidence: 99%

“…Additionally, invasive gas sampling using a quartz probe, including a subsequent analysis via gas chromatography, was used to determine major combustion species. The setup is described in detail elsewhere [8,12].…”

Section: Pox Burner Setup and Experimental Resultsmentioning

confidence: 99%

Manufacturing of a Burner Plate by Diffusion Bonding to Investigate Premixed Fuel‐Rich Oxy‐Fuel Flames at Increased Pressure and Preheating

Gietzelt¹,

Sentko²,

Stelzner³

et al. 2023

Chem Eng & Technol

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Combustion of hydrocarbons with pure oxygen as oxidizer is used, e.g., in hightemperature processes such as the partial oxidation (POX) of hydrocarbons to produce synthesis gas of high purity. Due to the prevailing temperatures, active cooling is required for many parts. For laboratory-scale experiments, the dimensions of key parts are too small for conventional manufacturing processes. One example is the manufacturing of a burner plate especially developed for POX processes. The complex geometries of several hundreds of burner nozzles and perpendicular cooling channels across the diameter of the burner plate cannot be manufactured in a conventional way. For this burner, the advantage of chemical etching of thin sheet material and stacking of multiple sheet layouts was used to assemble the layout of the burner. The burner plate was then diffusion-bonded, allowing the complex design to be realized. The partial oxidation of CH 4 /O 2 flames at the laboratory scale could thus be studied under industrially relevant conditions.

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“…Unfortunately, the flame temperatures exhibiting the extent of SAFT are difficult to measure in experiments with low uncertainties. For example, in the pure CH 4 + O 2 flame temperature measurements by Sentko et al, 22,23 the experimental temperature uncertainty is around ±100 K for all high-temperature results, with inevitable heat losses from radiation and environmental diffusion. In contrast, the SAFT extent from simulations is on the level of 10−100 K for CH 4 + O 2 + N 2 flames in most cases 21 (also see Table 2), which could be thus misinterpreted, even if there were experimental results.…”

Section: Introductionmentioning

confidence: 99%

SAFT Regimes and Laminar Burning Velocities: A Comparative Study of NH₃ + N₂ + O₂ and CH₄ + N₂ + O₂ Flames

et al. 2023

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Super adiabatic flame temperature (SAFT) is a distinctive phenomenon in the adiabatic flame where the local maximum temperature exceeds the adiabatic flame temperature. The flame temperatures exhibiting the extent of SAFT are difficult to measure with low uncertainties in experiments, while the laminar burning velocity also represents global flame features, thus could possibly be related to the SAFT. The present study investigated the SAFT regimes, laminar burning velocities (S L), and their relationships for the CH4 + O2 + N2 and NH3 + O2 + N2 flames over large equivalence (ϕ) and oxygen ratio (x O2 ) ranges. The laminar burning velocities were experimentally measured using the heat flux method at ϕ = 1.4–1.8 and x O2 = 0.22–0.44, where some conditions have never been reported before in the literature. Comparisons were made with simulated S L results using five CH4 mechanisms and five NH3 mechanisms, and none of them well reproduce all of the experimental data. From the simulation results, three CH4 SAFT regimes (I, II, and III) and two NH3 SAFT regimes (I and II) have been identified, among which regime III for CH4 and regime II for NH3 were found for the first time. The kinetic origins of these regimes were discussed, and different flame features regarding the flame temperature and dominant species were clarified. The relationship between the SAFT extent and the laminar burning velocity is revealed by equation derivation based on the classical flame theories, proving that a mechanism reproducing well the S L and its temperature dependence can at the same time yield accurate predictions of the SAFT. The present study also provided the most sensitive reactions in the SAFT predictions accompanied by the rate constant uncertainties, which can be helpful for further mechanism development since none of the mechanisms reproduces well the present S L experimental data, let alone the SAFT extent.

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Experimental investigation of the pressure influence on flame structure of fuel-rich oxy-fuel methane flames for synthesis gas production

Cited by 9 publications

References 41 publications

Experimental Characterization of Flame Structure and Soot Volume Fraction of Premixed Kerosene Jet A-1 and Surrogate Flames

Experimental Characterization of Flame Structure and Soot Volume Fraction of Premixed Kerosene Jet A-1 and Surrogate Flames

Manufacturing of a Burner Plate by Diffusion Bonding to Investigate Premixed Fuel‐Rich Oxy‐Fuel Flames at Increased Pressure and Preheating

SAFT Regimes and Laminar Burning Velocities: A Comparative Study of NH₃ + N₂ + O₂ and CH₄ + N₂ + O₂ Flames

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Experimental investigation of the pressure influence on flame structure of fuel-rich oxy-fuel methane flames for synthesis gas production

Cited by 9 publications

References 41 publications

Experimental Characterization of Flame Structure and Soot Volume Fraction of Premixed Kerosene Jet A-1 and Surrogate Flames

Experimental Characterization of Flame Structure and Soot Volume Fraction of Premixed Kerosene Jet A-1 and Surrogate Flames

Manufacturing of a Burner Plate by Diffusion Bonding to Investigate Premixed Fuel‐Rich Oxy‐Fuel Flames at Increased Pressure and Preheating

SAFT Regimes and Laminar Burning Velocities: A Comparative Study of NH3 + N2 + O2 and CH4 + N2 + O2 Flames

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SAFT Regimes and Laminar Burning Velocities: A Comparative Study of NH₃ + N₂ + O₂ and CH₄ + N₂ + O₂ Flames