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Effects of Moisture and Temperature on the Photooxidation of Ethylene on Titania
Abstract
The effect of temperature, water vapor concentration, and ethylene concentration on the photooxidation of ethylene on titania was investigated. Ultraviolet radiation from a black-light lamp together with a glass-plate reactor were used to develop intrinsic oxidation rates. Ethylene oxida tion rates decreased significantly as the water vapor concentration was increased from 1000 ppmv for the three temperatures (2, 27, and 48 °C) investigated. The influence of water vapor on the reaction rate derived from the low adsorption of ethylene due to its low adsorption affinity relative to water. Over the range of water vapor concentration of 1000−25000 ppmv, ethylene oxidation rates increased as the temperature increased. An Arrhenius plot of the measured ethylene oxidation rates indicated an apparent activation energy of 3.4 kcal/mol. A Langmuir−Hinshelwood expression displaying an explicit temperature dependence was used to correlate the entire set of rate data. Based on this correlation, an enthalpy of adsorption for ethylene of −2.6 kcal/mol was found.
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Cited by
TiO2 photocatalysis and related surface phenomena
FUJISHIMA, A., ZHANG, X., & TRYK, D. (2008) · Surface Science Reports · doi:10.1016/j.surfrep.2008.10.001 · Cited by 6,737
Nanostructured materials for photocatalysis
Xu, C., Ravi Anusuyadevi, P., Aymonier, C., Luque, R., & Marre, S. (2019) · Chemical Society Reviews · doi:10.1039/c9cs00102f · Cited by 1,082
Volatile organic compounds in indoor environment and photocatalytic oxidation: state of the art
Wang, S., Ang, H. M., & Tade, M. O. (2007) · Environment International · doi:10.1016/j.envint.2007.02.011 · Cited by 678
Infrared Spectra of Photoinduced Species on Hydroxylated Titania Surfaces
Szczepankiewicz, S. H., Colussi, A. J., & Hoffmann, M. R. (2000) · The Journal of Physical Chemistry B · doi:10.1021/jp0007890 · Cited by 326
Einaga, H. (2002) · Applied Catalysis B: Environmental · doi:10.1016/s0926-3373(02)00056-5 · Cited by 323
Metadata
- Authors
- Obee, T. N., & Hay, S. O.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 1997-06-30
- Volume
- 31
- Issue
- 7
- Pages
- 2034-2038
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2083243692
- Cited by
- 198
- References
- 0
- FWCI
- 4.68
- Type
- journal article
- Language
- en
- Open access
- closed
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- Obee, T. N., & Hay, S. O. (1997). Effects of Moisture and Temperature on the Photooxidation of Ethylene on Titania. Environmental Science & Technology. https://doi.org/10.1021/es960827m
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