Thermal Decomposition of Nitrocompounds in Shock Waves. IV: Decomposition of Nitric Acid

1974; Volume: 78; Issue: 1 Linguagem: Inglês

10.1002/bbpc.19740780112

ISSN

0005-9021

Autores

K. Glänzer, J. Troe,

Tópico(s)

Combustion and flame dynamics

Resumo

Abstract The thermal decomposition of nitric acid highly diluted in Ar has been studied in shock waves at 890 < T < 1200 K and 8.0 · 10 −6 < [Ar] < 3.2 · 10 −4 mol cm −3 . Concentration profiles of HNO 3 , NO 2 , and NO 3 have been monitored. The rate constants of the unimolecular decomposition of HNO 3 and the subsequent reaction OH + HNO 3 can be determined directly. The results for the unimolecular decay and low temperature data of the combination reaction of HO and NO 2 have been combined to derive expressions for the rate constants in the range between room temperature and 1200K. A reaction mechanism which accounts for the observed concentration profiles is discussed.

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