Abstract
AbstractThe reactions of OH radicals with the isomers of butene (1‐C4H8, cis‐2‐C4H8, trans‐2‐C4H8, iso‐C4H8) have been studied at low pressure using an isothermal flow reactor (295 – 298 K, p = 0.9 – 10 Torr) and a Laval‐nozzle reactor (p < 0.1 Torr). The hydroxyl radicals have been produced via the reactions H/D + NO2 or F + H2O/D2O, hydroxy butyl radicals via the reactions F + 1‐C4H9OH, 2‐C4H9OH, sec‐C4H9OH, tert‐C4H9OH. Samples were withdrawn continuously by a molecular beam sampling system and were analyzed mass spectrometrically, applying synchronous ion counting and chemical modulation techniques. – The reaction mechanism is found as The stabilization of the adduct is the main reaction channel at room temperature and around 1 Torr, abstraction reactions are negligeable. – The reaction mechanisms were analyzed in terms of addition/redissociation/stabilization/isomerization/decomposition, using unimolecular rate theory. The results were applied for the prediction of product formation at conditions of technical combustion processes.
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More From: Berichte der Bunsengesellschaft für physikalische Chemie
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