Study on photosensitized oxidative desulfurization of thiophene by riboflavin |
| |
Authors: | Di-shun ZHAO Fa-tang LI Zhi-min SUN |
| |
Affiliation: | aCollege of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China;bCollege of Sciences, Hebei University of Science and Technology, Shijiazhuang 050018, China |
| |
Abstract: | Photosensitized oxidative desulfurization of thiophene in n-octane/water extraction system with riboflavin as photosensitizer and O2 in air as oxidant was studied. A 500 W high pressure Hg lamp was used as the light source for irradiation and air was introduced by a gas pump for supplying O2. The desulfurization yield of thiophene was 85.4% for a 3 h photoirradiation under the conditions with an air flow of 150 mL/min, water/oil ratio of 1:1 and riboflavin concentration of 30 μmol/L. The mechanism of photosensitized oxidation of thiophene is1O2 exited from 3O2 by the addition of riboflavin. Under the above conditions, the photooxidation kinetics of thiophene with O2/riboflavin is first-order with a rate constant of 0.3277 h−1 and half-time of 1.37 h. |
| |
Keywords: | thiophene photooxidation riboflavin photosensitizer |
本文献已被 ScienceDirect 等数据库收录! |