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首页> 外文期刊>Environmental Science & Technology >Atmospheric Chemistry Of Sulfuryl Fluoride: Reaction With Oh Radicals, Cl Atoms And 0_3, Atmospheric Lifetime, Ir Spectrum, And Global Warming Potential
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Atmospheric Chemistry Of Sulfuryl Fluoride: Reaction With Oh Radicals, Cl Atoms And 0_3, Atmospheric Lifetime, Ir Spectrum, And Global Warming Potential

机译：氟化硫的大气化学：与Oh自由基，Cl原子和0_3的反应，大气寿命，Ir光谱和全球变暖潜能

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摘要

Sulfuryl fluoride (SO_2F_2) is a radiatively active industrial chemical released into the atmosphere in significant (ktonne/ year) quantities. The potential for SO_2F_2 to contribute to radiative forcing of climate change needs to be assessed. Long path length FTIR/smog chamber techniques were used to investigate the kinetics of the gas-phase reactions of Cl atoms, OH radicals, and 0_3 with SO_2F_2, in 700 Torr total pressure of air or N_2 at 296 ± 1 K. Upper limits of M(Cl + SO_)2F_2) < 9 × 10~(-19), k(OH + SO_2F_2) < 1.7 × 10~(-14) and k(0_3 + SO_2F_2) < 5.5 × 10~(-24) cm~3 molecule~(-1) s~(-1) were determined. Reaction with Cl atoms, OH radicals, or 0_3 does not provide an efficient removal mechanism for SO_2F_2. The infrared spectrum of SO_2F_2 is reported and a radiative efficiency of 0.196 W m~(-2) ppbv~(-1) was calculated. Historic production data estimates are presented which provide an upper limit for expected atmospheric concentrations. The radiative forcing of climate change associated with emissions of SO_2F_2 depends critically on the atmospheric lifetime of SO_2F_2. Further research is urgently needed to define the magnitude of potential nonatmospheric sinks.
机译：硫酰氟（SO_2F_2）是一种放射性活性工业化学品，以大量（千吨/年）释放到大气中。需要评估SO_2F_2对气候变化的辐射强迫做出贡献的潜力。使用长路径长度FTIR /烟气室技术研究了在296±1 K的空气或N_2总压力为700 Torr时Cl原子，OH自由基和0_3与SO_2F_2的气相反应动力学。 M（Cl + SO_）2F_2）<9×10〜（-19），k（OH + SO_2F_2）<1.7×10〜（-14）和k（0_3 + SO_2F_2）<5.5×10〜（-24）cm确定了〜3分子〜（-1）s〜（-1）。与Cl原子，OH自由基或0_3的反应不能为SO_2F_2提供有效的去除机理。报告了SO_2F_2的红外光谱，计算出辐射效率为0.196 W m〜（-2）ppbv〜（-1）。给出了历史生产数据估算值，该估算值提供了预期大气浓度的上限。与SO_2F_2的排放有关的气候变化的辐射强迫关键取决于SO_2F_2的大气寿命。迫切需要进一步的研究来确定潜在的非大气汇的大小。

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