On-Line Oxidation of Volatile Organic Compounds Generated by Sawmill Wood Kilns

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The primary purpose of this project was to evaluate the effectiveness of the use of hydrogen peroxide in combination with ultra-violet (UV) light for the reduction in the amount of volatile organic compounds (VOC’s) released into the environment during wood drying in sawmill kilns. As originally envisioned the scope of work included the optimization of reaction parameters i.e. pH, peroxide concentration, UV light intensity that would lead to successful destruction of VOC’s. The second phase involved development of a prototypical reactor that could be taken to a sawmill kiln for demonstration of treatment of a slipstream. However, after some of ... continued below

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Kumar, R. Arun; Steele, Philip & Patterson, W. Dean March 29, 2007.

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Description

The primary purpose of this project was to evaluate the effectiveness of the use of hydrogen peroxide in combination with ultra-violet (UV) light for the reduction in the amount of volatile organic compounds (VOC’s) released into the environment during wood drying in sawmill kilns. As originally envisioned the scope of work included the optimization of reaction parameters i.e. pH, peroxide concentration, UV light intensity that would lead to successful destruction of VOC’s. The second phase involved development of a prototypical reactor that could be taken to a sawmill kiln for demonstration of treatment of a slipstream. However, after some of our initial experiments, we were forced to limit ourselves to more modest testing and development. During the project period we designed and constructed a small-scale reactor that was connected to the off-gas from a small wood drying kiln located at the Forest Products Lab at Mississippi State University. We ran a number of tests where we varied the process parameters (peroxide concentration, pH and UV light intensity) with no reasonable amount of VOC destruction. We employed a number of ways to atomize the peroxide into the kiln off-gas including using Laskin nozzles to see if that would improve the VOC reduction, but it was to no avail. The next option we explored was to try and utilize Fenton’s Reagent to see if that would be an effective tool in our treatment process. Initial measurements appeared to provide very good VOC reductions, but upon more detailed investigation it appeared that the oxygen being generated in the Fenton’s reaction was artificially reducing the VOC concentration coming from the treatment chamber. The last treatment system that we tried to use was the treatment of the kiln off-gas with hydrogen peroxide injection in the vapor phase. We were not able to achieve any success with this treatment method either. It appears from our tests that there doesn’t seem to be an easy way of obtaining VOC reduction using hydrogen peroxide in the presence of UV light. Either the reaction times are too long, or it is very difficult to get full mixing between the hydrogen peroxide and the off-gas.

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  • Report No.: Final Technical Report
  • Grant Number: FC36-04GO14311
  • DOI: 10.2172/901446 | External Link
  • Office of Scientific & Technical Information Report Number: 901446
  • Archival Resource Key: ark:/67531/metadc879146

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  • March 29, 2007

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Oct. 31, 2016, 7:32 p.m.

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Kumar, R. Arun; Steele, Philip & Patterson, W. Dean. On-Line Oxidation of Volatile Organic Compounds Generated by Sawmill Wood Kilns, report, March 29, 2007; United States. (digital.library.unt.edu/ark:/67531/metadc879146/: accessed August 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.