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- W1965196557 abstract "The pyrolysis of NH 3 was studied behind reflected shock waves at temperatures 2500–3000 K, using mass spectrometric analysis of dynamically sampled gas. The initial mixtures contained 0.14% to 6% NH 3 , with Kr as diluent, at total gas concentrations of about 2 × 10 −6 mol cm −3 . Concentration profiles of NH 3 , NH 2 , NH, and N 2 were measured. It was found that the apparent rate coefficient for overall removal of NH 3 is increased by increasing the initial NH 3 concentration, but is decreased by addition of H 2 . Addition of H 2 also suppressed NH, but left the NH 2 concentration relatively unchanged. A close correlation was found between NH 2 concentration and N 2 formation rate, indicating that NH 2 participates in the reaction which produces N 2 .The experimental results are consistent with a chain mechanism in which NH 3 is removed by unimolecular decomposition and by attack by H, NH, and NH 2 . Computer analysis yields a rate constant of 1.2 × 10 16 exp (−91 000 cal mol −1 /RT) cm 3 mol −1 s −1 for the unimolecular process." @default.
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- W1965196557 date "1979-03-15" @default.
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- W1965196557 title "A shock-tube study of ammonia pyrolysis" @default.
- W1965196557 cites W1965942115 @default.
- W1965196557 doi "https://doi.org/10.1139/v79-112" @default.
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