Photodegradation of methyl tertiary butyl ether (MTBE) vapor with immobilized titanium dioxide

Sang Eun Park, Hyunku Joo, Joonwun Kang

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

A study on the photocatalytic degradation of methyl tertiary butyl ether (MTBE) vapor was performed with respect to reaction parameters, kinetics, and mechanism. A conventional TiO2-coated plate system was used for this initial work on vaporized MTBE. On irradiating with UVBLB (∼5mW/cm 2), 0.6mg/cm2 of TiO2 (P25) photocatalyst showed the highest reaction rate (0.85 μmol/min) for 25.76μmole of MTBE (1000 ppmv). The numerical values obtained depended predictably with respect to light intensity, initial concentration, and quantity of P25. The photocatalytic degradation of MTBE followed Lanmuir-Hinshelwood kinetics with a linearity of 0.989. As far as the mechanism of degradation is concerned, attack by generated hydroxyl radicals on the methoxy group in the MTBE structure dominated and proceeded through tert-butyl formate (TBF) as an intermediate, instead of methyl group to proceed through producing 2-methoxy-2-methyl propionaldehyde (MMP). TBF finally degrades to CO2 through acetone, which was shown easily converted to CO2. This study shows that the use of sunlight seems to be possible given adequate tools for concentrating the light.

Original languageEnglish
Pages (from-to)73-84
Number of pages12
JournalSolar Energy Materials and Solar Cells
Volume80
Issue number1
DOIs
Publication statusPublished - 2003 Oct 15

Fingerprint

Photodegradation
Ether
Titanium dioxide
Ethers
Vapors
Degradation
Photocatalysts
Acetone
Kinetic parameters
Hydroxyl Radical
Reaction rates
titanium dioxide
Kinetics
tert-butyl formate

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

Cite this

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abstract = "A study on the photocatalytic degradation of methyl tertiary butyl ether (MTBE) vapor was performed with respect to reaction parameters, kinetics, and mechanism. A conventional TiO2-coated plate system was used for this initial work on vaporized MTBE. On irradiating with UVBLB (∼5mW/cm 2), 0.6mg/cm2 of TiO2 (P25) photocatalyst showed the highest reaction rate (0.85 μmol/min) for 25.76μmole of MTBE (1000 ppmv). The numerical values obtained depended predictably with respect to light intensity, initial concentration, and quantity of P25. The photocatalytic degradation of MTBE followed Lanmuir-Hinshelwood kinetics with a linearity of 0.989. As far as the mechanism of degradation is concerned, attack by generated hydroxyl radicals on the methoxy group in the MTBE structure dominated and proceeded through tert-butyl formate (TBF) as an intermediate, instead of methyl group to proceed through producing 2-methoxy-2-methyl propionaldehyde (MMP). TBF finally degrades to CO2 through acetone, which was shown easily converted to CO2. This study shows that the use of sunlight seems to be possible given adequate tools for concentrating the light.",
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Photodegradation of methyl tertiary butyl ether (MTBE) vapor with immobilized titanium dioxide. / Park, Sang Eun; Joo, Hyunku; Kang, Joonwun.

In: Solar Energy Materials and Solar Cells, Vol. 80, No. 1, 15.10.2003, p. 73-84.

Research output: Contribution to journalArticle

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