CS自由基与O_2的反应研究

STUDY ON CARBON MONOSULFIDE RADICAL AND OXYGEN REACTION

采用CS2 在 1 85nm光照下产生CS自由基的方法 ,研究了CS自由基与O2 的反应 .在纯CS2 和CS2 O2 体系 ,光解产生的CS自由基中 ,CS2 的量子产额分别为Φ表观 =0 6 2和Φ′表观 =2 0 5、表观速率常数分别为k表观 =8 0 6× 1 0 - 4s- 1和k′表观 =2 72×1 0 - 3 s- 1,并讨论了CS自由基与O2 反应的机理 .研究表明 ,CS自由基与O2 反应的主要产物为COS,SO2 和SO3 ,N2 的加入不影响CS自由基与O2 的反应 .

For the study on the source of COS in the atmosphere,the reaction of carbon monosulfide radical with O 2 was studied in the CS 2-O 2 system exposed at 185nm.The apparent rate constants and the apparent quantum yields of CS 2 dissociated into carbon monosulfide radical in the CS 2 and CS 2-O 2 systems were 8.06×10 -4s -1 and 2.72×10 -3s -1,0.62 and 2.05 respectively,and the mechanism for the reaction of CS with O 2 was discussed.The experiment showed that the main products of carbon monosulfide radical reaction with O 2 were COS,SO 2 and SO 3,and the added N 2 had no influence on the reaction of CS with O 2.