Comparison of structures of laminar methane–oxygen and methane–air diffusion flames from atmospheric to 60atm

Joo, Peter H.; Charest, Marc; Groth, C. P. T.; Gülder, Ömer L.

doi:10.1016/j.combustflame.2013.04.030

Cited by 49 publications

(12 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…74 The transport properties comprise mass diffusivity, dynamic viscosity, and thermal conductivity. in the O 2 /CO 2 oxidizer will not be enough to sustain stable flame, 81,82 ie, the minimum oxygen fraction is greater than 21%. The CO 2 /O 2 oxidizer also has higher volumetric heat capacity compared with air, which in turn reduces the flame temperature, thereby reducing flame speed and stability.…”

Section: Comparison Of Air-fuel Vs Oxy-fuel Combustion Conceptsmentioning

confidence: 99%

“…It can thus be deduced that if an air-fuel combustor is converted to oxy-fuel operation at the same equivalence ratio and without any geometry changes, a 21% oxygen fraction (by vol.) in the O 2 /CO 2 oxidizer will not be enough to sustain stable flame, 81,82 ie, the minimum oxygen fraction is greater than 21%. Ditaranto et al 83,84 have shown that the oxy-combustion process requires at least 30% oxygen fraction to achieve stable combustion as compared with air-based combustion.…”

Section: Comparison Of Air-fuel Vs Oxy-fuel Combustion Conceptsmentioning

confidence: 99%

See 1 more Smart Citation

Frontiers in combustion techniques and burner designs for emissions control and CO₂capture: A review

et al. 2019

View full text Add to dashboard Cite

Summary The use of fossil fuel is expected to increase significantly by midcentury because of the large rise in the world energy demand despite the effective integration of renewable energies in the energy production sector. This increase, alongside with the development of stricter emission regulations, forced the manufacturers of combustion systems, especially gas turbines, to develop novel combustion techniques for the control of NOx and CO2 emissions, the latter being a greenhouse gas responsible for more than 60% to the global warming problem. The present review addresses different burner designs and combustion techniques for clean power production in gas turbines. Combustion and emission characteristics, flame instabilities, and solution techniques are presented, such as lean premixed air‐fuel (LPM) and premixed oxy‐fuel combustion techniques, and the combustor performance is compared for both cases. The fuel flexibility approach is also reviewed, as one of the combustion techniques for controlling emissions and reducing flame instabilities, focusing on the hydrogen‐enrichment and the integrated fuel‐flexible premixed oxy‐combustion approaches. State‐of‐the‐art burner designs for gas turbine combustion applications are reviewed in this study, including stagnation point reverse flow (SPRF) burner, dry low NOx (DLN) and dry low‐emission (DLE) burners, EnVironmental burners (including EV, AEV, and SEV burners), perforated plate (PP) burner, and micromixer (MM) burner. Special emphasis is made on the MM combustor technology, as one of the most recent advances in gas turbines for stable premixed flame operation with wide turndown and effective control of NOx emissions. Since the generation of pure oxygen is prerequisite to oxy‐combustion, oxygen‐separation membranes became of immense importance either for air separation for clean oxy‐combustion applications or for conversion/splitting of the effluent CO2 into useful chemical and energy products. The different carbon‐capture technologies, along with the most recent carbon‐utilization approaches towards CO2 emissions control, are also reviewed.

show abstract

Section: Comparison Of Air-fuel Vs Oxy-fuel Combustion Conceptsmentioning

confidence: 99%

Section: Comparison Of Air-fuel Vs Oxy-fuel Combustion Conceptsmentioning

confidence: 99%

Frontiers in combustion techniques and burner designs for emissions control and CO₂capture: A review

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The thermophoretic sampling system was designed with the aim of integrating it into an existing high-pressure combustion chamber and its laminar diffusion flame burner. This high-pressure chamber and the co-flow burner have been described in detail in previous publications highlighting its full experimental capabilities; [28][29][30][31][32][33][34][35][36] only certain technical features, which are required to describe the thermophoretic sampling system and its operation, will be summarized here. A schematic of the experimental setup is shown in Fig.…”

Section: Thermophoretic Sampling System Design and Operationmentioning

confidence: 99%

A multi-probe thermophoretic soot sampling system for high-pressure diffusion flames

Vargas

Gülder

2016

Review of Scientific Instruments

Self Cite

View full text Add to dashboard Cite

Optical diagnostics and physical probing of the soot processes in high pressure combustion pose challenges that are not faced in atmospheric flames. One of the preferred methods of studying soot in atmospheric flames is in situ thermophoretic sampling followed by transmission electron microscopy imaging and analysis for soot sizing and morphology. The application of this method of sampling to high pressures has been held back by various operational and mechanical problems. In this work, we describe a rotating disk multi-probe thermophoretic soot sampling system, driven by a microstepping stepper motor, fitted into a high-pressure chamber capable of producing sooting laminar diffusion flames up to 100 atm. Innovative aspects of the sampling system design include an easy and precise control of the sampling time down to 2.6 ms, avoidance of the drawbacks of the pneumatic drivers used in conventional thermophoretic sampling systems, and the capability to collect ten consecutive samples in a single experimental run. Proof of principle experiments were performed using this system in a laminar diffusion flame of methane, and primary soot diameter distributions at various pressures up to 10 atm were determined. High-speed images of the flame during thermophoretic sampling were recorded to assess the influence of probe intrusion on the flow field of the flame.

show abstract

“…The authors observed that, as the pressure increased, the visible flame height of the methane/oxygen flames decreased, while the visible flame height of methane/air flames remained constant. The comparison of soot production, for different pressures, showed that maximum soot fraction produced by methane/ air flames was considerably higher than in methane/oxygen flames [12].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the intensity of visible spectra of these flames was more important with oxygen enrichment. Joo et al [12] performed a numerical and an experimental study of the structures of laminar diffusion methane/oxygen and methane/air flames under a wide range of operating pressures (from 1 atm to 60 atm). The authors observed that, as the pressure increased, the visible flame height of the methane/oxygen flames decreased, while the visible flame height of methane/air flames remained constant.…”

Section: Introductionmentioning

confidence: 99%

A numerical investigation of structure and emissions of oxygen-enriched syngas flame in counter-flow configuration

Safer

Tabet

Ouadha

et al. 2015

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Comparison of structures of laminar methane–oxygen and methane–air diffusion flames from atmospheric to 60atm

Cited by 49 publications

References 39 publications

Frontiers in combustion techniques and burner designs for emissions control and CO₂capture: A review

Frontiers in combustion techniques and burner designs for emissions control and CO₂capture: A review

A multi-probe thermophoretic soot sampling system for high-pressure diffusion flames

A numerical investigation of structure and emissions of oxygen-enriched syngas flame in counter-flow configuration

Contact Info

Product

Resources

About

Comparison of structures of laminar methane–oxygen and methane–air diffusion flames from atmospheric to 60atm

Cited by 49 publications

References 39 publications

Frontiers in combustion techniques and burner designs for emissions control and CO2capture: A review

Frontiers in combustion techniques and burner designs for emissions control and CO2capture: A review

A multi-probe thermophoretic soot sampling system for high-pressure diffusion flames

A numerical investigation of structure and emissions of oxygen-enriched syngas flame in counter-flow configuration

Contact Info

Product

Resources

About

Frontiers in combustion techniques and burner designs for emissions control and CO₂capture: A review

Frontiers in combustion techniques and burner designs for emissions control and CO₂capture: A review