Temperature dependence of the product branching ratio of the CN + O{sub 2} reaction

Journal Article · Thu May 13 00:00:00 EDT 1999 · Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory

DOI:https://doi.org/10.1021/jp990373q· OSTI ID:351575

Rim, K T; Hershberger, J F ^[1]

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1. North Dakota State Univ., Fargo, ND (United States). Dept. of Chemistry

The reaction of CN radicals with O{sub 2} was studied using infrared diode laser absorption spectroscopy. CO and CO{sub 2} products were detected directly, while the yield of NCO products was inferred by measuring the N{sub 2}O yield upon addition of excess NO. Experiments and kinetic modeling calculations were performed to examine the extent of secondary chemistry in this system. The following branching ratios of the CN + O{sub 2} reaction at 296 K were determined: {phi}(N+CO{sub 2}) = 0.02 {+-} 0.01 and {phi}(CO+NO) = 0.22 {+-} 0.02. The branching ratio into the CO + NO channel has a strong negative temperature dependence over the range 239--643 K.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG03-96ER14645
• OSTI ID: 351575
• Journal Information: Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory, Vol. 103, Issue 19; Other Information: PBD: 13 May 1999
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
CHEMICAL REACTION KINETICS
CYANIDES
RADICALS
OXYGEN
ABSORPTION SPECTROSCOPY
INFRARED SPECTRA
TEMPERATURE DEPENDENCE
REACTION INTERMEDIATES