A Proposed Mechanism of Photocatalytic Oxidation of Trichloroethylene in Gas Phase  

作　　者：Gong Hu LI Hu Lan MA Wei Zhu AN (Chengdu Institute of Organic Chemistry, The Chinese Academy of Sciences, Chengdu 610041) 

出　　处：《Chinese Chemical Letters》2000年第1期31-34,共4页中国化学快报（英文版）

摘　　要：GC/MS has been used to identify gas phase products and intermediates formed during the gas phase photocatalytic oxidation of trichloroethylene (TCE) on TiO(2) with low BET surface area. A new byproduct, oxalyl choloride (ClCOCOCl) was detected together with other byproducts such as COCl(2), CHCl(3), DCAC and C(2)HCl(5). Firstly the method of perturbation on the reaction system was conducted. Very little amount of water was carried into the feed gas and subsequent changes were observed. The discussion based on the product distribution changes led to a postulated mechanism consisting of two stages.GC/MS has been used to identify gas phase products and intermediates formed during the gas phase photocatalytic oxidation of trichloroethylene (TCE) on TiO(2) with low BET surface area. A new byproduct, oxalyl choloride (ClCOCOCl) was detected together with other byproducts such as COCl(2), CHCl(3), DCAC and C(2)HCl(5). Firstly the method of perturbation on the reaction system was conducted. Very little amount of water was carried into the feed gas and subsequent changes were observed. The discussion based on the product distribution changes led to a postulated mechanism consisting of two stages.

关 键 词：photocatalytic oxidation TRICHLOROETHYLENE product distribution 

分 类 号：O644[理学—物理化学]