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| Home > Publications database > Temperature dependence of the rate coefficient for the a-pinene reaction with ozone in the range between 243 K and 303 K |
| Journal Article | PreJuSER-4706 |
; ; ; ;
2009
RSC Publ.
Cambridge
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Please use a persistent id in citations: doi:10.1039/b813407c
Abstract: The absolute rate coefficient for the reaction of alpha-pinene with ozone was determined in the temperature range between 243 K and 303 K at atmospheric pressure. In total, 30 experiments were performed in the large (85 m3) temperature-controlled simulation chamber AIDA, where the concentrations of the reactants ozone and alpha-pinene were measured directly. An Arrhenius expression for the alpha-pinene + ozone reaction was derived with a pre-exponential factor of (1.4 +/- 0.4) x 10(-15) cm3 s(-1) and a temperature coefficient of (833 +/- 86) K. This rate coefficient is in good agreement (-5%) with the current IUPAC (IUPAC 2007) recommendation at 298 K. The IUPAC recommendation is significantly larger (+27%), around 243 K where the recommended values were extrapolated from higher temperatures. This finding is relevant for tropical regions where strong updrafts can rapidly transport reactive hydrocarbons like alpha-pinene from the boundary layer into the cold regions of the free troposphere.
Keyword(s): Absorption (MeSH) ; Kinetics (MeSH) ; Mass Spectrometry (MeSH) ; Monoterpenes: chemistry (MeSH) ; Ozone: chemistry (MeSH) ; Protons (MeSH) ; Temperature (MeSH) ; Tropical Climate (MeSH) ; Ultraviolet Rays (MeSH) ; Monoterpenes ; Protons ; Ozone ; alpha-pinene ; J
; JCR ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
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