Kinetic study of the NOâ-CHâO reaction and its possible role in nighttime tropospheric chemistry (original) (raw)

1985

Abstract

The kinetics of the reaction NOâ + CHâO ..cap alpha.. HONOâ + HCO (14) have been studied by using in situ, long-path (170 m), infrared and visible spectroscopy to follow the reactants and products in dilute mixtures of Oâ, NOâ, and CHâO in Nâ/Oâ at 700 torr (25 +/- 2°C). The concentrations of Oâ, NOâ, CHâO, NâOâ, CO, HONOâ, and HCOâH were determined as a function of time through their characteristic infrared absorption bands by using a Fourier transform infrared spectrometer system. The concentrations of NOâ and NOâ were followed by using the characteristic visible absorption bands monitored by a differential optical absorption spectrometer. The kinetic data were analyzed by using both rates of product formation (CO) and reactant removal (NâOâ, NOâ, CHâO) and computer simulations. 44 references, 2 figures, 3 tables.

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