【摘要】 在 1 8 5nm紫外光照射下 ,研究了COS体系、COS O2 体系以及COS 空气体系中COS的转化反应 ,并考察了光照时间、O2 分压和水气对COS光解的影响 .推导了COS光解速率方程 ,并计算了其表观量子产率 ,据此提出了 1 85nm紫外光作用下COS在不同体系中的反应机理 .实验表明 ,平流层紫外光解是COS的重要汇 ,也是平流层含硫气溶胶的主要来源之一更多还原

【Abstract】 The UV photolysis kinetics of COS at 185nm was investigated in three systems(COS,COS O 2 and COS air).The exposed time,O 2 partial pressure and water vapor had an obvious effect on the conversion rate of COS.The experimental results show that photodissociations reveal the apparent first order reaction with the rate constants 3 88×10 -4 s -1 for COS and 2 02×10 -3 s -1 for COS O 2.The products of COS photolysis,SO 2,SO 3,CO 2 and CO,were determined both in COS O 2 and COS air systems,which indicated that the COS UV photolysis was one of the main sources of the sulphate aerosols in the stratosphere.更多还原