| 초록 |
A fiber-optic bundled array reactor(OFR) as a means of light transmission to a solid supported P-25 Degussa TiO2 semiconductor was constructed. This reactor configuration enhances the uniformity and distribution of the light activated catalyst within a given reactor volume relative to conventional fixed bed reactor designs. This results in reduced mass transfer limitations to photochemical conversion and allows for higher processing capacities. The system can be operated in both gas- and aqueous-phase modes. In addition, the OFR system allows for remote delivery of light over a distance upto several kilometers, therefore it could be used for the in-situ treatment of contaminated underground sites. MTBE (Methyl tert-butyl ether) has been used as a gasoline additive to reduce volatile organic carbon emission from vehicles. The environmental fate of MTBE has become a subject of renewed interest due to the large quantities of this compound that are now being used to oxygenate gasoline. However, MTBE has hadnegative environmental impacts on water quality due to the leakage petroleum products from the underground storage tanks, which is highly soluble (e.g., 0.35 - 0.71M) and has been detected at high concentrations in ground water. The objective of this work was to illustrate the feasibility of photocatalysis with pulse illumination as a means of complete or partial destruction of MTBE with OFR .
|
