Journal ArticleDOI
NOx and fuel emissions in combustion of hydrogen/air mixtures near inert surfaces
Preeti Aghalayam,Dionisios G. Vlachos +1 more
- Vol. 27, Iss: 1, pp 1435-1442
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TLDR
In this article, the roles of inlet composition, radiative loss from the surface, and thermal quenching by cold walls in NO x and fuel emissions were analyzed for premixed H 2 /air flames near inert surfaces.Abstract:
Combustion of premixed H 2 /air flames near inert surfaces was studied numerically using detailed chemistry and multicomponent transport. The roles of inlet composition, radiative loss from the surface, and thermal quenching by cold walls in NO x and fuel emissions were analyzed. It is shown that the bifurcation behavior in terms of extinguishability strongly determines the role of thermal quenching in emissions. For weak, extinguishable flames, thermal quenching at the surface effectively reduces NO x emissions, although at the cost of higher fuel emissions. Strong, nonextinguishable flames at low strain rates are practically unaffected by thermal quenching except for an increased NO 2 mole fraction near the surface.read more
Citations
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Journal ArticleDOI
Surface modification of polypropylene film using N2O-containing flames
Mark A. Strobel,Neal P. Sullivan,Melvyn C. Branch,John Park,Michael J. Ulsh,Ronald S. Kapaun,Beth Leys +6 more
TL;DR: In this paper, contact-angle measurements and X-ray photoelectron spectroscopy (XPS) were used to characterize polypropylene (PP) films that were exposed to laminar premixed air: natural gas flames containing small quantities of nitrous oxide.
Journal ArticleDOI
Gas-phase modeling of impinging flames used for the flame surface modification of polypropylene film
Mark A. Strobel,Neal P. Sullivan,Melvyn C. Branch,Viv Jones,John Park,Michael J. Ulsh,Joan M. Strobel,Christopher S. Lyons +7 more
TL;DR: In this paper, contact-angle measurements, atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS) were used to characterize flame-treated biaxially oriented polypropylene (PP) films.
Journal ArticleDOI
Transport issues when impinging laminar premixed flame jets on a rotating cylinder
TL;DR: In this paper, the effects of strain on the impinging flame-jet structure were modeled using the SPIN application of the CHEMKIN software, and the results indicated that the species that are likely to participate in surface oxidation are H, OH, O 2, HO 2, and H 2 O 2.
Journal ArticleDOI
Exergy analysis and NO emission of the H2-fueled micro burner with slinky projection shape channel for micro-thermophotovoltaic system
TL;DR: In this paper , a micro burner with a slinky projection shape channel was proposed to improve the energy output of the MTPV system and reduce the NOx emission, and the effect of the slinky projections amplitude, slinky projection fins number, and basic oscillating channel radius on the energy conversion characteristics and NOx emissions was investigated.
Journal ArticleDOI
Destruction of NO during Catalytic Combustion on Platinum and Palladium
Navin Khadiya,Nick G Glumac +1 more
TL;DR: In this article, Mole fraction profiles of NO are obtained by laser-induced fluorescence in a catalytic combustion environment consisting of a stagnation flow of hydrogen, oxygen, and 150 ppm of NO over platinum and palladium substrates.
References
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TL;DR: This paper introduced the physical effects underlying heat and mass transfer phenomena and developed methodologies for solving a variety of real-world problems, such as energy minimization, mass transfer, and energy maximization.
Journal ArticleDOI
A numerical study of laminar flame wall quenching
TL;DR: In this paper, a laminar flame quenching at the cold wall of a combustion chamber has been studied, using a numerical model to describe the reactive flow, combining an unsteady treatment of fluid mechanics and a detailed chemical reaction mechanism.
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TL;DR: The first eight chapters are in the realm of combustion science with only the last two dealing with combustion engineering as discussed by the authors, and most if not all the chapters were written between 1980 and 1985, so they all suffer from being five to ten years out of date although some have stood up well with the passage of time.
Journal ArticleDOI
Implementing NOx control: Research to application
L.J. Muzio,G.C. Quartucy +1 more
TL;DR: A review of the history of NOx control implementation over this time period, with an emphasis on the role that research has played on NOX control technology, development and implementation is presented in this paper.
Journal ArticleDOI
Ignition and extinction of flames near surfaces: Combustion of H2 in air
TL;DR: In this paper, the ignition and extinction characteristics in homogeneous combustion of H2 in air close to inert surfaces are studied with detailed chemistry involving 19 reversible reactions and 9 species, and two-parameter bifurcation diagrams are constructed as functions of equivalence ratio and strain rate.