DETERMINATION OF THE DECOMPOSITION KINETICS OF HYDRAZINE USING A SINGLE-PULSE SHOCK TUBE.
Abstract
The rate of decomposition of carefully purified hydrazine was measured by a single-pulse shock tube method over the temperature range, 970K to 1120K and the pressure range, 2. 3 to 8. 6 atmospheres, at a concentration of about 1 mole per cent in argon. The experimental data on reaction order, activation energy, and stoichiometry, together with kinetic and thermochemical considerations, lead to the conclusion that the decomposition kinetics obey a simple non-chain mechanism. Possible chain mechanisms are examined in detail and found to be at variance with the observations. By making use of some recent data of Michel and Wagner, a high-pressure limiting rate constant is obtained for the reaction, N2H4 yields 2 NH2, over the temperature range from 970K to 1550K. Thus D(H2N-NH2) is determined to be 54 kcal, , with an uncertainty ofo of about 2 kcal. At low pressures, approximately 6 effectively classical oscillators appear to contribute energy to the unimolecular decomposition of N2H4. An apparent activation energy of ca. 36 kcal is predicted for the second-order flame reaction, in agreement with experiments. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1964
- Accession Number
- AD0605129
Entities
People
- B. E. Knox
- E. T. Mchale
- H. B. Palmemlaalmer
Organizations
- Pennsylvania State University