Journal ArticleDOI
Mass spectrometric sampling of flames: how ionic equilibria in flames produce sampling falsifications and “fake” ions, but provide kinetic and thermodynamic data on the reaction occurring
TLDR
In this paper, it was shown that if a positive ion reacts exothermally in a reversible reaction with a time constant briefer than ≈ 0.5 µs, that reaction will be equilibrated early in the flame and if the orifice is small, the equilibrium will be just fast enough to shift position to that for a temperature reduced in both the thermal boundary layer around the inlet, and in accelerating to the speed of sound.About:
This article is published in Progress in Energy and Combustion Science.The article was published on 2022-01-01. It has received 5 citations till now. The article focuses on the topics: Chemistry & Body orifice.read more
Citations
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Journal ArticleDOI
Cationic structure of premixed near-stoichiometric CH4/O2/Ar flames at atmospheric pressure: New insights from mass spectrometry, quantum chemistry, and kinetic modeling
Denis A. Knyazkov,Ilya E. Gerasimov,Tatyana A. Bolshova,Vitaly G. Kiselev,Andrey G. Shmakov,A. A. Paletsky +5 more
TL;DR: In this article , the effect of a nickel sampling cone used in the measurements on the flame was comprehensively modeled using a two-dimensional direct numerical simulation of reacting flow near the axially symmetric probe along with a reduced chemical kinetic mechanism.
Journal ArticleDOI
Technologies Integration towards Bio-fuels Production: A State-of-the-art Review
TL;DR: In this paper , a comprehensive review concerning the state-of-the-art conceptual designs of technologies integration as well as their performances is urgently needed for promoting future development of integrated bio-fuels production technologies.
Journal ArticleDOI
Investigation on the Effect of Charge Injection from Non-Thermal Plasma on Soot Formation in Laminar Coflow Diffusion Flame
Yong Tan,Yichen Zong,Maurin Salamanca,Jacob W. Martin,Jochen A.H. Dreyer,Jethro Akroyd,Wenming Yang,Markus Kraft +7 more
TL;DR: In this article , a modified coflow burner was developed to study the effect of charge injection from a nonthermal plasma into three helium-diluted laminar coflow diffusion ethylene flames.
Journal ArticleDOI
Experimental and kinetic modeling study of the positive ions in premixed ethylene flames over a range of equivalence ratios
Denis A. Knyazkov,Andrey V. Cherepanov,Vitaly G. Kiselev,Ilya E. Gerasimov,Tina Kasper,Andrey G. Shmakov +5 more
TL;DR: In this paper , the spatial distributions of positive ions in atmospheric-pressure burner-stabilized premixed flames of ethylene/oxygen/argon mixtures in a wide range of equivalence ratios ϕ = 0.4÷1.5.
Journal ArticleDOI
A Review on 1-D Nanomaterials: Scaling-Up with Gas-Phase Synthesis.
TL;DR: In this paper , a review of recent developments, applications, and capabilities in gas-phase synthesis methods of nanowire arrays is presented, as well as remaining challenges and needs are addressed to advance this field.
References
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Journal ArticleDOI
In situ chemical ionization as a probe for neutral constituents upstream in a methane-oxygen flame
TL;DR: In this paper, the early stages of combustion are considered for a conical premixed methane-oxygen flame of fuel-lean composition (equivalence ratio = 0.2) burning at atmospheric pressure.
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Heat release and radical recombination in premixed fuel-lean flames of H2+ O2+ N2. Rate constants for H + OH + M → H2O + M and HO2+ OH → H2O + O2
TL;DR: In this paper, the temperatures along the burnt gases of several oxygen-rich flames of H2+ O2+ N2 have been measured and a detailed evaluation of all the chemical reactions proceeding in such fuel-lean flames has been carried out.
Journal ArticleDOI
The formation of polyhedral carbon ions in fuel-rich acetylene and benzene flames
TL;DR: The mass distribution of positive and negative polyhedral carbon ions are quite different, the negative having more and larger particles as discussed by the authors, and the influence of the C/O ratio and the unburned gas velocity is investigated.
Journal ArticleDOI
Charged Particles in Sooting Flames I. Determination of Mass Distributions and Number Densities in C2H2‐O2 Flames
Abstract: A combination of a nozzle beam sampling system with a simple mass discriminator (mass range 50 to 105 mass units) is described which allows to determine the mass distributions and number densities both of positively and negatively charged soot particles in low pressure flames. The application to slightly sooting C2H2 - 0, flames shows that a strong increase in ionization at the start of the soot forming zone is associated with a soot particle growth from a few hundred to about 2000 mass units. Ionizing soot particles can be distinguished from heavy hydrocarbon ions originating in the oxidation zone. Charged soot particles are smaller on the average than uncharged ones. The maximum number density of charged particles is strongly correlated to the amount of soot formed in the flame. The ionization potential of small soot particles is estimated to ∼5 eV.
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S.D.T. Axford,Allan N. Hayhurst +1 more