| 放电条件下SF5CF3的分解反应 |
| 摘要点击 1959 全文点击 1717 投稿时间：2004-03-09 修订日期：2004-05-17 |
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| 中文关键词 火花放电 SF5CF3 辐射强迫 分解 汇 |
| 英文关键词 spark discharge SF5CF3 radiative force dissociation sinks |
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| 中文摘要 |
| SF5CF3是近年被发现的具有强红外辐射强迫、长寿命的新温室气体.本文利用火花放电技术模拟研究了放电条件下SF5CF3的去除机理.结果表明,SF5CF3在放电过程中将被分解并生成多种含硫、氟、氧和碳的化合物.H2O的存在能够降低SF5CF3的分解速率,但降低的量与H2O的分压无关. 在有H2O存在的条件下,当体系总压约为31kPa时,闪电过程中SF5CF3的分解速率常数分别为0.011s-.同时,SF5CF3的分解率随着体系的总压上升而呈指数下降.基于实验结果,对SF5CF3在放电过程中的反应途径作了探讨,并估算实际大气中放电的一种形式--闪电所引起的SF5CF3的分解量为53.6 kg·a-. |
| 英文摘要 |
| SF5CF3 was identified recently as a potent greenhouse gas with strong radiative force and long atmosphere residential life. Spark discharge method was used to take simulative investigation on the elimination of SF5CF3 from atmosphere under discharge here. The results show that SF5CF3 was dissociated under discharge and formed some compounds containing S, F, O and C. The dissociation of SF5CF3 was reduced if the system existed H2O, but it was independent of the amount of H2O. The rate coefficients were estimated to be 0.011s- under moisture circumstance when the system total pressure was about 31 kPa. And the increase of the system pressure would cause exponential decrease of SF5CF3 dissociation. The reactive mechanism was argued based on the experiment results and the sinks of SF5CF3 under lightning (one of the discharge in the atmosphere) was estimated to be 53.6 kg·a-. |
