核黄素光敏化氧化二苯并噻吩的研究  

Study on Photosensitized Oxidative Desulfurization of Dibenzothiophene by Riboflavin

作　　者：张娟[1] 赵地顺[1] 杨洁[1] 杨立彦[1] 

机构地区：[1]河北科技大学化学与制药工程学院,石家庄050018

出　　处：《高等学校化学学报》2011年第5期1118-1122,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20276015);河北省自然科学基金(批准号:203364)资助

摘　　要：以二苯并噻吩(DBT)的正辛烷溶液模拟柴油、水为溶剂、空气中的O2为氧化剂和核黄素(RF)为光敏剂,研究了DBT在15 W紫外杀菌灯照射下的光化学氧化.结果表明,反应的最佳条件为:核黄素浓度20mg/L,空气流速80～100 mL/min.在该反应条件下反应2 h后,DBT的脱硫率为60%.核黄素是通过1O2历程来敏化DBT的,该条件下的脱硫反应符合一级反应的动力学特征.质谱分析DBT氧化后的产物有DBT亚砜、DBT砜和硫酸根离子.Photosensitized oxidative desulfutization of dibenzothiophene （DBT） in n-octane/water extraction system was studied with riboflavin as photosensitizer and O2 in air as oxidant. A 15 W UV lamp was used as the light source for irradiation and air was introduced by a gas pump for O2 supplying. The result showed that DBT was photooxidized successfully. The optimal reaction conditions are riboflavin concentration at 20 mg/L and the air flow at 80--100 mL/min. Under optimal conditions, the removal ratio of DBT is up to 60% after 2 h reaction. Riboflavin sensitized DBT by 1 O2 mechanism, the kinetics of photosensitized oxidation of DBT is first-order reaction. Photooxidized products of DBT are DBT 5-oxide, DBT 5,5-dioxide and SO2- by mass spectrum.

关 键 词：核黄素 二苯并噻吩 光氧化 脱硫 

分 类 号：O643[理学—物理化学]