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- W2019135038 abstract "Mass spectrometric measurements have shown that the charged species in an oxygen-rich flame are mainly H3O+ and the free electron. These ions are most probably produced via H + OH⇌H2O*(6), H2O*+ H → H3O++ e–(7) where H2O* is excited, either vibrationally or electronically. The fact that the concentrations of the radicals H and OH early in such a flame exceed their values for final equilibrium, leads to the initial generation of ions being relatively rapid. When the alkali metals, Na or K, are added to the flame, Na+ and K+ appear much more quickly than can be explained by thermal ionisation, which dominates the production of ions from alkali metals in fuel-rich flames. The explanation appears to be the hitherto unsuspected reaction: H2O*+ A → A+· H2O + e–, A+· H2O + M = A++ H2O + M where A = Na or K. Kinetic parameters have been derived for many of these processes, and are presented. Alternative explanations, e.g. K + OH → K++ OH– or K + H3O+→ K++ H2O + H, are not able to account for the rapid production of ions. It is also concluded that the H2O* participating in reactions (6) and (7) is most probably in an antibonding electronic state." @default.
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- W2019135038 title "Ionisation in premixed fuel-lean flames of H2, O2and N2. Part 2.—Ions from alkali-metal additives" @default.
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- W2019135038 doi "https://doi.org/10.1039/ft9959100835" @default.
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