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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Photocatalytic synthesis of oxygenated hydrocarbons from diesel fuel for mobile deNOx application

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Title
Photocatalytic synthesis of oxygenated hydrocarbons from diesel fuel for mobile deNOx application
Author
Kim, Jae YulKim, Yeon HoHan, SuenghoonChoi, Sun HeeLee, Jae Sung
Keywords
Photocatalytic partial oxidation; Oxygenated hydrocarbons; TiO2– SiO2 mixed oxides; NOx reduction; Diesel vehicle
Issue Date
201306
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
JOURNAL OF CATALYSIS, v.302, no., pp.58 - 66
Abstract
oxygenated hydrocarbons (OHCs) as an effective nitrogen oxide (NOx) reductant in selective catalytic reduction (SCR) systems. Thus, TiO2-based photocatalysts produced OHCs composed mainly of C-1-C-6 aldehydes under UV irradiation, and TiO2-SiO2 mixed oxide photocatalysts showed higher selectivity and yield to OHCs than pristine TiO2 by diluting contiguous Ti sites and suppressing complete oxidation to CO2. The effects of reaction variables were studied in detail. A novel scheme of NOx after-treatment system for diesel engine exhaust line was proposed involving the new photocatalytic reaction, where on-board photocatalytic partial oxidation of a small amount of diesel fuel produced OHCs that were supplied to the deNOx system as NOx reductant. Although further improvement is needed in the selectivity for OHCs as well as the system operability, the proposed scheme could be a more environment-friendly option than the reduction by urea, currently considered the most promising technology.
URI
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DOI
http://dx.doi.org/10.1016/j.jcat.2013.03.003
ISSN
0021-9517
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