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
Proton affinity of water and the mechanism and kinetics of production of H3O+ in flames of H2, O2 and N2
TL;DR: From mass spectrometric measurements of the concentrations of H3O+ in flames of H2, O2 and N2 without additives, it was concluded that equilibrium levels of H 3O+ are gradually attained in the burnt gases.
Journal ArticleDOI
Ion chemistry of phosphorus in hydrocarbon flames: Part 1. electron scavenging by negative ion formation
TL;DR: The formation chemistry of this considerable variety of phosphorus anions is discussed in detail in detail, involving mainly three-body association, nucleophilic displacement (S N 2) and proton abstraction reactions as mentioned in this paper.
Journal ArticleDOI
Some observations on the ionization of alkali and alkaline-earth elements in hydrogen flames
K. Schofield,T.M. Sugden +1 more
TL;DR: In this paper, the intensity of atomic resonance radiation from controlled traces of sodium and potassium in premixed hydrogen-oxygen-nitrogen flames of known temperature at atmospheric pressure, under conditions where a substantial fraction of the alkali metal would be ionized at equilibrium.
Journal ArticleDOI
Chemical reactions in supersonic nozzle flows
TL;DR: In this paper, a supersonic nozzle flows is used to simulate vibrational relaxation and electron-ion recombination, and sudden freezing analysis is applied to analyze the resulting reactions.
Journal ArticleDOI
Mass-spectrometric investigation of the anions and cations in a hydrocarbon flame doped with sulphur/fluorine additives
TL;DR: In this article, a fuel-lean, premixed, CH 4 O 2 flame at atmospheric pressure was doped with 0.2 mol% of SF 6 and 0.1mol% of triflic anhydride (CF 3 SO 2 ) 2 O. The main objective was to ascertain the ability of these sulphur/fluorine additives and their combustion products to scavenge free electrons by forming negative ions in the flame gas.
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S.D.T. Axford,Allan N. Hayhurst +1 more