Experimental and Numerical Investigation of the Hetero-/Homogeneous Combustion of Lean Propane/Air Mixtures Over Platinum

Karagiannidis, Symeon

doi:10.1007/978-3-642-17668-5_4

Cited by 10 publications

(19 citation statements)

References 14 publications

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“…The homogeneous ignition location defined as the streamwise position where OH levels rise to 5% of their maximum values [71,72]; this definition is consistent with the intersection of the tangent to the inflection point of the OH profile with the x-axis [25]. Fig.…”

Section: Effect Of Reaction Modementioning

confidence: 98%

Effects of heterogeneous–homogeneous interaction on the homogeneous ignition in hydrogen-fueled catalytic microreactors

Chen

Liu

Gao

et al. 2016

International Journal of Hydrogen Energy

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Section: Effect Of Reaction Modementioning

confidence: 98%

Effects of heterogeneous–homogeneous interaction on the homogeneous ignition in hydrogen-fueled catalytic microreactors

Chen

Liu

Gao

et al. 2016

International Journal of Hydrogen Energy

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“…Finally, in fuel-lean combustion of higher hydrocarbons (Le > 1) plots similar to that of Figure 8.4 provide surface temperatures approaching the corresponding adiabatic equilibrium from upstream underadiabatic values. This is a highly desirable property that considerably simplifies reactor design; however, higher hydrocarbons such as propane and butane are of interest mainly in microreactors for portable power production [10] and not in largescale power generation.…”

Section: 21 Reactor Thermal Managementmentioning

confidence: 99%

“…A new configuration suitable for kinetic studies is the high-pressure, hightemperature, optically accessible channel-flow reactor shown in Figure 8.6 [10,17,21,47]. The test rig consists of a rectangular reactor, which is embedded inside a high-pressure tank that provides pressurization up to 20 bar.…”

Section: Hetero-/homogeneous Kineticsmentioning

confidence: 99%

“…The use of both LIF and Raman measurements is essential for the validation of gasphase reaction schemes [9,10,17,21,28]. An evaluation of the catalytic processes preceding the onset of homogeneous ignition is still necessary, despite the validation of the catalytic scheme [23] in the preceding section.…”

Section: Gas-phase Kineticsmentioning

confidence: 99%

“…Notwithstanding the large surface-to- volume ratios of such structures, which in turn favor catalytic fuel conversion, homogeneous combustion within the catalytic reactor cannot always be ignored, particularly at elevated pressures [9,10]. Progress in hetero-/homogeneous combustion technologies largely depends on crucial advances in catalyst technology (development of active and thermally stable catalysts) and also on multidimensional numerical modeling needed for reactor design.…”

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confidence: 99%

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Hetero‐/Homogeneous Combustion

Mantzaras

2010

Handbook of Combustion

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The sections in this article are Introduction Fundamentals of Catalytic Combustion Reactor Thermal Management Hetero‐/Homogeneous Combustion in Power Generation Hetero‐/Homogeneous Kinetics Fuel‐Lean Methane Combustion on Platinum Catalytic Kinetics Gas‐Phase Kinetics Hetero‐/Homogeneous Chemistry Coupling Fuel‐Lean Hydrogen Combustion on Platinum Fuel‐Rich Methane Combustion on Rhodium Application to Practical Systems Turbulent Hetero‐/Homogeneous Combustion Conclusions Acknowledgments

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New Directions in Advanced Modeling and in Situ Measurements Near Reacting Surfaces

Mantzaras

2013

Flow Turbulence Combust

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Multidimensional numerical modeling and in situ spatially-resolved measurements of gas-phase thermoscalars over the catalyst boundary layer have fostered fundamental investigation of the heterogeneous and homogeneous chemical reaction pathways and their coupling at realistic operating conditions. The methodology for validating catalytic and gas-phase reaction mechanisms is firstly outlined for industrially-relevant fuels. Combination of advanced modeling and in situ near-wall species and velocity measurements is then used to address the intricate interplay between interphase fluid transport (laminar or turbulent) and hetero-/homogeneous kinetics. Controlling parameters of this interplay are the homogeneous ignition chemistry, flame propagation characteristics, competition between the catalytic and gaseous pathways for fuel consumption, diffusional imbalance of the limiting reactant, flow laminarization due to heat transfer from the hot catalytic walls, and fuel leakage through the gaseous reaction zone. Dynamic reactor operation and intrinsic flame dynamics driven by interactions between homogeneous kinetics and catalytic walls are outlined using detailed transient simulation. It is shown that the presence of catalytic reactions moderates flame instabilities. Future directions for transient modeling and for temporally-resolved in situ near-wall measurements are finally summarized. Keywords Hetero-/homogeneous combustion modeling • Near-wall in situ Raman • LIF and PIV measurements • Homogeneous ignition over catalytic surfaces • Turbulent channel flow catalytic combustion • Flame dynamics in catalytic channels Nomenclature B ratio of catalytically active to geometrical surface area c p , c s Specific heat of gas at constant pressure, specific heat of solid

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Experimental and Numerical Investigation of the Hetero-/Homogeneous Combustion of Lean Propane/Air Mixtures Over Platinum

Cited by 10 publications

References 14 publications

Effects of heterogeneous–homogeneous interaction on the homogeneous ignition in hydrogen-fueled catalytic microreactors

Effects of heterogeneous–homogeneous interaction on the homogeneous ignition in hydrogen-fueled catalytic microreactors

Hetero‐/Homogeneous Combustion

New Directions in Advanced Modeling and in Situ Measurements Near Reacting Surfaces

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