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2007 Fiscal Year Final Research Report Summary

Development of hybrid type of removal equipment for VOC(Volatile Organic Compound)by diffusion scrubber method

Research Project

Project/Area Number 18310060
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental technology/Environmental materials
Research InstitutionKeio University

Principal Investigator

TANAKA Shigeru  Keio University, Fac. Sci. Technol., Professor (10137987)

Co-Investigator(Kenkyū-buntansha) OKUDA Tomoaki  Keio University, Fac. Sci. Technol., Instructor (30348809)
Project Period (FY) 2006 – 2007
KeywordsDiffusion scrubber method / Hybrid type / Removal equipment / VOC(Volatile Oreanic Compound) / Benzene / Toluene / Xylene / Aldehyde
Research Abstract

Recently, Volatile Organic Compounds (VOCs) emitted from building materials, adhesives, gasoline, automobile exhaust gas has become a serious problem as the air pollution and indoor air pollution.
Removal and treatment equipment for VOCs (Volatile Organic Compounds) in the air was developed by diffusion scrubber method. The equipment consisted of parallel plate type of diffusion scrubber with ACF (Activated Carbon Fiber) sheet. It could remove VOCs by flowing in the polluted air into the narrow space between two parallel ACF sheets. "Diffusion scrubber method" which flows the polluted air the narrow space between parallel plates has small aeration resistance, compared with the conventional air cleaning method used by "filtration". Therefore, diffusion scrubber method can treat a large volume of the polluted air due to its small aeration resistance. The removal equipment consists of a simple structure which has set the basic unit of the two ACF sheets to 410 layers. Between the two ACF s … More heets, in order to pass air, the spacer is inserted and the space between the two ACF sheets is 0.07mm.
VOCs gases (Benzene, Toluene, Ethylbenzene, p-Xylene, Trichloroethylene, Tetrachloroethylene) of 400-500ppbv was introduced into the removal equipment at the air flow rate of 600m^3/h. As results of evaluation experiments, it was found that the removal equipment could remove VOCs at more than 90% of removal efficiency. At the air flow rate of 1200m^3/h, the high removal efficiency of 80% for VOCs were also acquired. And then, it was found that the removal efficiency the removal equipment was agreed with the theoretical value calculated from Gormley-Kennedy equation.
In this study, the diffusion scrubber method was also combined with the photo catalyst action of titanium oxide (TiO_2), and the removal equipment for HCHO was developed to achieve high removal efficiency and small energy consumption. In order to irradiate efficiently ultraviolet rays to TiO_2 coated surface, the wheel type diffusion scrubber was developed. the wheel type diffusion scrubber consists of 36 boards coated with TiO_2 and they are set radically at 10 interval around a black light as a source of ultraviolet rays. By covering with the Pyrex glass outside 36 boards coated with TiO_2, the wheel type diffusion scrubber can use sunlight as a source of ultraviolet rays from any direction. The removal experiment of HCHO was carried out in the field by using the wheel type diffusion scrubber. 80% of high removal efficiency for HCHO was maintained to near the sunset by introducing 0.7 ppm of HCHO at 50 m^3/h to the wheel type diffusion scrubber. Less

  • Research Products

    (6 results)

All 2008 2007 2006

All Journal Article (3 results) Presentation (3 results)

  • [Journal Article] 低コストVOC除去処理技術の開発2008

    • Author(s)
      田中 茂
    • Journal Title

      コンバーテック 36

      Pages: 82-85

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 拡散スクラバー法を用いた循環効率的なVOC削減技術2007

    • Author(s)
      田中 茂
    • Journal Title

      ケミカル・エンジニヤリング 52

      Pages: 39-42

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 拡散スクラバー法を用いた揮発性有機化合物(VOC)の除去処理技術2007

    • Author(s)
      田中 茂
    • Journal Title

      機械の研究 59

      Pages: 757-764

    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] TiO_2光触媒を用いた歯車型拡散スクラバーによる有害ガス(アルデヒド)除去処理技術の開発2007

    • Author(s)
      丹羽 宏成
    • Organizer
      第25回空気清浄とコンタミネーションコントロール研究大会
    • Place of Presentation
      早稲田大学国際会議場
    • Year and Date
      2007-04-13
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 活性炭繊維シートを用いた平行板型拡散スクラバーによる塗装、印刷工場から排出されるVOC除去処理技術の開発2007

    • Author(s)
      渡邉 諭
    • Organizer
      第48回大気環境学会年会
    • Place of Presentation
      岡山市岡山理科大学
    • Year and Date
      2007-03-06
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Development of removal equipment for hazardous gases by using the diffusion scrubber coated with TiO_2 photo catalyst2006

    • Author(s)
      Shigeru, Tanaka
    • Organizer
      The 18th International Symposium on Contamination Control
    • Place of Presentation
      Beijing, China
    • Year and Date
      20060906-07
    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2010-02-04  

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