Ozonolysis of monoterpenes in mechanical ventilation systems |
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| Institution: | 2. Department of Applied Physics and Electronics, Umeå University, SE-901 87 Umeå, Sweden;3. Swedish Defence Research Agency, SE-901 82 Umeå, Sweden;1. Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aoba 6-3, Aoba-ku, Sendai 980-8578, Japan;2. Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei 10617, Taiwan, ROC;1. National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230029, PR China;2. School of Nuclear Engineering and Geophysics, East China Institute of Technology, Nanchang, Jiangxi 330013, PR China;3. Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, PR China;1. Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, 00014 Helsinki, Finland;2. Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 166 10 Prague 6, Czech Republic;3. Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, 128 43 Prague 2, Czech Republic;1. State Key Laboratory of Explosion Science and Technology, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China;2. Department of Chemistry and Center for Computational Chemistry, University of Georgia, Athens, GA 30602, USA |
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| Abstract: | In this investigation the ozonolysis of of three monoterpenes (α-pinene, Δ3-carene and limonene) was studied was studied in authentic mechanical ventilation systems, that included either a cross flow or a rotary heat exchanger. The effects of varying three experimental parameters were investigated: the level of ozone (25 and 75 ppb), the reaction time (25 and 75 s), and the surface area in the ventilation duct (14.8 and 29.5 m2). The initial concentration of each of the monoterpenes was 20 ppb in every experiment, and 1–16% of the α-pinene, <0.5–13% of the Δ3-carene, and <0.5–16% of the limonene reacted. The effects of humidity (g m?3) and temperature of the outdoor and supply air, and water losses in the ventilation duct, were also evaluated. Experiments were based on a chemometric statistical design. Comparison of the results to theoretically calculated values showed that theoretical calculations underestimated the amounts that reacted in the ventilation systems by factors of 2–13, depending on the monoterpene and experimental settings. |
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