H2/O2 three-body rates at high temperaturesHydrogen atoms are produced in the presence of excess O2, and the first-order decay are studied as a function of temperature and pressure in order to obtain the rate coefficient for the three-body reaction between H-atoms and O2. Attention is focused on the kinetic scheme employed as well as the reaction cell and photolysis and probe laser system. A two-photon laser-induced fluorescence technique is employed to detect H-atoms without optical-thickness or O2-absorption problems. Results confirm measurements reported previously for the H + O2 + N2 reaction at 300 K and extend these measurements to higher temperatures. Preliminary data indicate non-Arrehenius-type behavior of this reaction rate coefficient as a function of temperature. Measurements of the rate coefficient for H + O2 + Ar reaction at 300 K give a rate coefficient of 2.1 +/- 0.1 x 10 to the -32nd cm exp 6/molecule sec.
Document ID
19910058980
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Marinelli, William J. (Physical Sciences, Inc. Andover, MA, United States)
Kessler, William J. (Physical Sciences, Inc. Andover, MA, United States)
Carleton, Karen L. (Physical Sciences, Inc. Andover, MA, United States)