Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9610479 | Catalysis Today | 2005 | 6 Pages |
Abstract
The influence of temperature on the mechanism and kinetics of gas-phase photocatalytic oxidation (PCO) and thermal oxidation (TO) of methyl tert-butyl ether (MTBE) and tert-butyl alcohol (TBA) over TiO2 was studied in a continuous flow annular reactor. The reaction products of PCO of both substances included acetone, water, carbon dioxide and carbon monoxide. Volatile TO products of MTBE included 2-methyl-1-propene (2-MP), carbon monoxide, carbon dioxide and water; TBA decomposed to 2-MP and water. Thermal oxidation of MTBE became noticeable at 388Â K, TBA started to decompose thermally at 393Â K. Both PCO and TO fit well to the Langmuir-Hinshelwood (L-H) model for monomolecular reactions. The dependence of the kinetic constants on temperature was established in the form of an Arrhenius equation. The TiO2 catalyst showed no deactivation at temperatures above 373Â K but gradually lost its activity below 373Â K.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Sergei Preis, Anna Kachina, Nuria Capdet Santiago, Juha Kallas,