Photochemical Ozidation of Thiophene Adsorbed on Na-ZSM-5 Zeolite by O2 in Oil/Acetonitrile Two-Phase Eztraction System
Photochemical oxidation of thiophene in n-octane/acetonitrile extraction system using O2 as oxidant was studied. Results obtained here can be used as the reference for the oxidative desulfurization of gasoline because thiophene is one of the main components containing sulfur in fluid catalytic cracking gasoline. A 500w high-pressure mercury lamp was used as light source for irradiation and air was introduced by a gas pump to supply O2. Thiophene dissolved in nopolar n-octane solvent was photodecomposed and removed into the polar acetonitrile phase. The desulfurization rate of thiophene in n-octane is 65.2％ under photo-irradiation for 5 h. It can be improved to 96.8％ by adding 0.15 g Na-ZSM-5 zeolite into 100mL reaction system, which is the absorbent for O2 and thiophene. And the photooxidation kinetics of thiophene with O2 and Na-ZSM-5 zeolite is first-order with an apparent rate constant of 0.6305 h-1 and half-time of 1.10 h under the conditions of air flow at 150 mL·min-1 and V(n-octane): V(water)=1:1.The sulfur content can be depressed from 800μL·L-1 to less than 26μL·L-1.
thiophene photochemical ozidation desulfurization Na-ZSM-5 zeolite kinetics
Fa-tang LI Rui-hong LIU Zhi-min SUN Di-shun ZHAO
College of Science Hebei University of Science and Technology Shijiazhuang 050018, China College of Chemical and Pharmaceutical Engineering Hebei University of Science and Technology Shijia
国际会议
上海
英文
3762-3765
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）