Document Detail


Feasibility of Light-Emitting Diode Uses for Annular Reactor Inner-Coated with TiO(2) or Nitrogen-Doped TiO(2) for Control of Dimethyl Sulfide.
MedLine Citation:
PMID:  21707635     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Limited environmental pollutants have only been investigated for the feasibility of light-emitting diodes (LED) uses in photocatalytic decomposition (PD). The present study investigated the applicability of LEDs for annular photocatalytic reactors by comparing PD efficiencies of dimethyl sulfide (DMS), which has not been investigated with any LED-PD system, between photocatalytic systems utilizing conventional and various LED lamps with different wavelengths. A conventional 8-W UV/TiO(2) system exhibited a higher DMS PD efficiency as compared with UV-LED/TiO(2) system. Similarly, a conventional 8-W visible lamp/N-enhanced TiO(2) system exhibited a higher PD efficiency as compared with six visible-LED/ N-enhanced TiO(2) systems. However, the ratios of PD efficiency to the electric power consumption were rather high for the photocatalytic systems using UV- or visible-LED lamps, except for two LED lamps (yellow- and red-LED lamps), compared to the photocatalytic systems using conventional lamps. For the photocatalytic systems using LEDs, lower flow rates and input concentrations, and shorter hydraulic diameters exhibited higher DMS PD efficiencies. An FTIR analysis suggested no significant absorption of byproducts on the catalyst surface. Consequently, it was suggested that LEDs can still be energy-efficiently utilized as alternative light sources for the PD of DMS, under the operational conditions used in this study.
Authors:
Wan-Kuen Jo; Sung-Soo Eun; Seung-Ho Shin
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-6-27
Journal Detail:
Title:  Photochemistry and photobiology     Volume:  -     ISSN:  1751-1097     ISO Abbreviation:  -     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-6-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376425     Medline TA:  Photochem Photobiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Photochemistry and Photobiology © 2011 American Society for Photobiology.
Affiliation:
Department of Environmental Engineering, Kyungpook National University Daegu, 702-701, Korea.
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