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Issue 13, 2009
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Temperature dependence of the rate coefficient for the α-pinene reaction with ozone in the range between 243 K and 303 K

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Abstract

The absolute rate coefficient for the reaction of α-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 α-pinene were measured directly. An Arrhenius expression for the α-pinene + ozone reaction was derived with a pre-exponential factor of (1.4 ± 0.4) × 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 α-pinene from the boundary layer into the cold regions of the free troposphere.

Graphical abstract: Temperature dependence of the rate coefficient for the α-pinene reaction with ozone in the range between 243 K and 303 K

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Publication details

The article was received on 01 Aug 2008, accepted on 24 Dec 2008 and first published on 09 Feb 2009


Article type: Paper
DOI: 10.1039/B813407C
Citation: Phys. Chem. Chem. Phys., 2009,11, 2323-2328
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    Temperature dependence of the rate coefficient for the α-pinene reaction with ozone in the range between 243 K and 303 K

    R. Tillmann, H. Saathoff, T. Brauers, A. Kiendler-Scharr and T. F. Mentel, Phys. Chem. Chem. Phys., 2009, 11, 2323
    DOI: 10.1039/B813407C

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