Tropospheric lifetimes of potential CFC replacements: Rate coefficients for reaction with the hydroxyl radical |
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| Institution: | 1. Advanced Membrane Technology Research Center (AMTEC), Universiti Teknologi Malaysia (UTM), 81310 Skudai, Johor, Malaysia;2. Department of Chemical Engineering, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran;3. Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur St., Ontario K1N 6N5, Canada;1. Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, Xi’an Jiaotong University, Xi’an, Shaanxi Province, 710049, PR China;2. School of Physical Science and Technology, XinJiang University, Urumqi, Xinjiang Uygur Autonomous Region 830000, PR China;1. Faculty of Engineering Technology, Universiti Malaysia Perlis (UniMAP), Kampus UniCITI Alam, Sungai Chuchuh, Padang Besar, 02100 Perlis, Malaysia;2. Integrated Material Process, Advanced Materials and Manufacturing Centre (AMMC), Faculty of Manufacturing and Mechanical Engineering, Universiti Tun Hussein Onn Malaysia, Parit Raja, Batu Pahat 86400, Johor Darul Takzim, Malaysia;3. Advanced Membrane Technology Research Centre (AMTEC), Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia;4. Department of Science and Mathematics, Faculty of Science, Art and Heritage, Universiti Tun Hussein Onn Malaysia, Parit Raja, Batu Pahat 86400, Johor, Malaysia;5. Department of Mechanical and Automative Engineering, Faculty of Engineering Technology Infrastructure, Infrastructure University Kuala Lumpur (IUKL), Unipark Suria, 43000 Selangor, Malaysia;1. Physikalische und Theoretische Chemie, Fakultät für Mathematik und Naturwissenschaften, Bergische Universität Wuppertal, D-42097 Wuppertal, Germany;2. Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany;3. Hamburg Center for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany;4. Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom |
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| Abstract: | An important consideration in the selection of potential replacements for CFs is the rate of hydrogen-atom abstraction by the hydroxyl radical. Approximate linear correlations are investigated that allow the prediction of the relevant rate constants for partially fluorinated hydrocarbons. These rate constants may used to infer tropospheric lifetimes. For fluorinated ethers, estimates are presented for important rate constants which have not yet been determined experimentally, and lifetimes are predicted. Differences between ethers and alkanes are discussed, and trends in the variation of lifetimes with the degree of fluorination are noted. |
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