TiO2 photocatalysis of gasoline oxygenates, kinetic parameters, and effects of catalyst types and loading on the degradation of methyl tert-butyl ether
Article
O'Shea, KE, Wu, T, Cooper, WJ. (2002). TiO2 photocatalysis of gasoline oxygenates, kinetic parameters, and effects of catalyst types and loading on the degradation of methyl tert-butyl ether
. ACS SYMPOSIUM SERIES, 799 165-176.
O'Shea, KE, Wu, T, Cooper, WJ. (2002). TiO2 photocatalysis of gasoline oxygenates, kinetic parameters, and effects of catalyst types and loading on the degradation of methyl tert-butyl ether
. ACS SYMPOSIUM SERIES, 799 165-176.
The fuel oxygenates, tert-butyl methyl ether (MTBE), diisopropyl ether (DIPE), tert-amyl methyl ether (TAME), and terf-butyl ethyl ether (ETBE) are readily degraded by TiO2 photocatalyst. Complete removal of these substrates can be easily achieved at concentrations up to at least 100 ppm. The observed rate of degradation for MTBE decreases with increasing concentration and while the degradation at a given concentration is consistent with first order kinetics, changes in the kinetic parameters as a function of concentration suggest the reaction is more complex than a simple first order process. A Langmuirian relationship between the initial rate of degradation and initial concentration of MTBE was observed which can be used to predict degradation rates over a wide range of concentrations. The photocatalytic activities of several TiO2 catalysts were measured and the effect of catalyst loading on the degradation rate was studied to determine the optimal conditions for the removal of MTBE.
