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Gas-phase photocatalytic oxidation of motor fuel oxygenated additives.
Water Sci Technol. 2004; 49(4):141-5.WS

Abstract

Methyl tert-butyl ether (MTBE) and tert-butyl alcohol (TBA) were oxidized in the gas phase by photocatalytic oxidation (PCO). Transient PCO was carried out at room temperature on TiO2 (Degussa P25), 0.2% Pt-TiO2, and 2% Pt-TiO2 catalysts. Surface-adsorbed reaction by-products were characterized by temperature-programmed desorption (TPD) and oxidation (TPO). Continuous flow PCO was also carried out at 373 K on TiO2. Acetone, H2O, and CO2 were the gas-phase products for PCO of TBA and MTBE, and formic acid was adsorbed on the TiO2 surface. Temperature-programmed desorption of TBA and MTBE formed 2-methyl-1-propene, water (TBA), and methanol (MTBE). During continuous-flow PCO, acetone desorbed in molar amounts equal to the amount of decomposed TBA and MTBE. The Pt/TiO2 catalysts had higher rates of complete oxidation during PCO and TPO. Injection of water during transient PCO increased the rates of oxidation of adsorbed TBA, formic acid, and acetone. Photocatalytic oxidation of TBA proceeded faster in humid air than dry air, but MTBE oxidation was less sensitive to humidity. The TiO2 catalyst was stable for MTBE, TBA, and acetone PCO at 373 K. The PCO at low conversions followed the Langmuir-Hinshelwood model.

Authors+Show Affiliations

Department of Chemical Engineering, Lappeenranta University of Technology, P.O. Box 20, Lappeenranta 53851, Finland. sergei.preis@lut.fiNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

15077962

Citation

Preis, S, and J L. Falconer. "Gas-phase Photocatalytic Oxidation of Motor Fuel Oxygenated Additives." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 49, no. 4, 2004, pp. 141-5.
Preis S, Falconer JL. Gas-phase photocatalytic oxidation of motor fuel oxygenated additives. Water Sci Technol. 2004;49(4):141-5.
Preis, S., & Falconer, J. L. (2004). Gas-phase photocatalytic oxidation of motor fuel oxygenated additives. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 49(4), 141-5.
Preis S, Falconer JL. Gas-phase Photocatalytic Oxidation of Motor Fuel Oxygenated Additives. Water Sci Technol. 2004;49(4):141-5. PubMed PMID: 15077962.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Gas-phase photocatalytic oxidation of motor fuel oxygenated additives. AU - Preis,S, AU - Falconer,J L, PY - 2004/4/14/pubmed PY - 2004/7/28/medline PY - 2004/4/14/entrez SP - 141 EP - 5 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci Technol VL - 49 IS - 4 N2 - Methyl tert-butyl ether (MTBE) and tert-butyl alcohol (TBA) were oxidized in the gas phase by photocatalytic oxidation (PCO). Transient PCO was carried out at room temperature on TiO2 (Degussa P25), 0.2% Pt-TiO2, and 2% Pt-TiO2 catalysts. Surface-adsorbed reaction by-products were characterized by temperature-programmed desorption (TPD) and oxidation (TPO). Continuous flow PCO was also carried out at 373 K on TiO2. Acetone, H2O, and CO2 were the gas-phase products for PCO of TBA and MTBE, and formic acid was adsorbed on the TiO2 surface. Temperature-programmed desorption of TBA and MTBE formed 2-methyl-1-propene, water (TBA), and methanol (MTBE). During continuous-flow PCO, acetone desorbed in molar amounts equal to the amount of decomposed TBA and MTBE. The Pt/TiO2 catalysts had higher rates of complete oxidation during PCO and TPO. Injection of water during transient PCO increased the rates of oxidation of adsorbed TBA, formic acid, and acetone. Photocatalytic oxidation of TBA proceeded faster in humid air than dry air, but MTBE oxidation was less sensitive to humidity. The TiO2 catalyst was stable for MTBE, TBA, and acetone PCO at 373 K. The PCO at low conversions followed the Langmuir-Hinshelwood model. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/15077962/Gas_phase_photocatalytic_oxidation_of_motor_fuel_oxygenated_additives_ L2 - https://www.lens.org/lens/search/patent/list?q=citation_id:15077962 DB - PRIME DP - Unbound Medicine ER -