Kinetics and mechanistic studies of the atmospheric oxidation of alkynes

Abstract

Kinetics studies of the OH-initiated oxidation of 2-butyne, propyne, and acetylene were conducted at 100 Torr and 298 K using turbulent flow chemical ionization mass spectrometry. The major oxidation products were identified, and with the aid of supporting electronic structure thermodynamics calculations, a general OH-initiated oxidation mechanism for the alkynes is proposed. The major product branching ratio and the product-forming rate constants for the 2-butyne-OH adduct + O2 reaction were experimentally determined as well. The atmospheric implications of the chemical oxidation mechanism and kinetics results are discussed.

Publisher

American Chemical Society

Publication Date

3-1-2005

Publication Title

Journal of Physical Chemistry A

Department

Chemistry and Biochemistry

Document Type

Article

DOI

https://dx.doi.org/10.1021/jp0454671

Keywords

Temperature dependence, Branching channel, Rate constant, Gas phase, OH radicals, Acetylene, Hydrocarbons, Photolysis, Emissions

Language

English

Format

text

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